1
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Għalhekk huwa akbar pjaċir tiegħi
nilqgħek kollha hawn illum

2
00:00:17,970 --> 00:00:20,600
għall-ewwel taħdita
ta ', ukoll, Introduzzjoni

3
00:00:20,600 --> 00:00:22,510
biex Kompjuter u l-Ipprogrammar.

4
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Magħruf ukoll bħala CS50 jew ukoll, CPSC
100, uffiċjalment hawn fil-Yale.

5
00:00:29,110 --> 00:00:34,820
>> Allura aħna ma setax jiġi aktar eċċitati
biex tilqagħkom kollha hawn.

6
00:00:34,820 --> 00:00:36,620
Jisimni Patrick Rebeschini.

7
00:00:36,620 --> 00:00:39,180
Jien l-instructor kap għall-klassi.

8
00:00:39,180 --> 00:00:43,600
I am hawn tirrappreżenta grupp
ta 'madwar 60 membri tal-persunal

9
00:00:43,600 --> 00:00:46,380
li se jaħdmu miegħek
matul il-semestru.

10
00:00:46,380 --> 00:00:49,040
Dan in-numru huwa kważi 60 minna.

11
00:00:49,040 --> 00:00:52,440
Madankollu tul il straordinarja
livell ta 'impenji

12
00:00:52,440 --> 00:00:56,555
li nitfgħu fis dan
klassi, jagħmel CS50-klassi

13
00:00:56,555 --> 00:01:00,690
fil-Yale University li toffri
l-akbar livell ta 'appoġġ

14
00:01:00,690 --> 00:01:01,960
kollu inti.

15
00:01:01,960 --> 00:01:05,940
U aħna ma setax jiġi aktar kburin
joffri din il-klassi hawn ukoll.

16
00:01:05,940 --> 00:01:11,380
>> Fil-fatt, kif inti dalwaqt se esperjenza,
CS50 huwa ħafna aktar minn klassi.

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00:01:11,380 --> 00:01:13,120
Huwa komunità.

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00:01:13,120 --> 00:01:15,250
U int se tkun parti
Hekk ta din il-komunità.

19
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Din hija t-tieni sena li
Yale qed toffri din il-klassi.

20
00:01:18,730 --> 00:01:21,640
Aħna qed jibnu fuq il estremi
suċċess tal-aħħar sena, fejn

21
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għal-ewwel darba,
hawn fuq din l-università,

22
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assistent tagħlim undergraduate
ġew adottati fil-klassijiet.

23
00:01:28,930 --> 00:01:32,650
Kollox beda bl
din il-klassi tas-sena.

24
00:01:32,650 --> 00:01:37,050
>> Allura kif tafu, il-klassi huwa mgħallem
flimkien ma 'Università ta' Harvard.

25
00:01:37,050 --> 00:01:39,920
Biex jgħallmu dan il-kors
aħna relying-- nistgħu

26
00:01:39,920 --> 00:01:44,850
joqgħod fuq il-kompetenza kbira ta
David Malan u t-tim Harvard.

27
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Allura David kien tagħlim
CS50 għal ħafna, 10 snin issa.

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U kull sena hu kien
timbotta l-konfini

29
00:01:51,160 --> 00:01:54,210
u jtejbu l-esperjenza klassi.

30
00:01:54,210 --> 00:01:58,940
Għal darb'oħra, aħna ma setax jiġi aktar kuntenti li
tkompli din il-kollaborazzjoni magħhom.

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00:01:58,940 --> 00:02:01,840
>> Fil-fatt, wieħed mill-
partijiet l-aktar interessanti,

32
00:02:01,840 --> 00:02:06,560
I se ngħid mill running din il-klassi issa,
kemm fil-Harvard u hawn fil-Yale,

33
00:02:06,560 --> 00:02:09,420
huwa l-verament inkredibbli
transfertilizzazzjoni

34
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ta 'ideat, maħsuba biex itejbu l-
esperjenza ta 'tagħlim lilkom ilkoll.

35
00:02:13,770 --> 00:02:18,130
Allura bħala riżultat ta 'din estensiv
kollaborazzjoni bejn it-tnejn

36
00:02:18,130 --> 00:02:23,070
università, CS50 huwa kburi li
jħabbar l-verżjoni l-ġdida din is-sena

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00:02:23,070 --> 00:02:24,770
ma 'bidliet notevoli.

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David kollha se tgħidilna dwar minnhom issa.

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Allura please-- ma din tkun
qal, jekk jogħġbok jissieħbu miegħi

40
00:02:31,450 --> 00:02:34,220
u merħba li tagħti
rawnd kbir ta 'applause

41
00:02:34,220 --> 00:02:37,290
biex jilqgħu David u
tim Harvard hawn fil-Yale.

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>> [Applause]

43
00:02:40,032 --> 00:02:41,882

44
00:02:41,882 --> 00:02:43,247
>> DAVID Malan: Grazzi.

45
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Grazzi.

46
00:02:43,746 --> 00:02:46,550

47
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Dan huwa CS50, Harvard University
u l-introduzzjoni Yale University

48
00:02:51,400 --> 00:02:53,960
għall-intellettwali
intrapriżi ta 'xjenza tal-kompjuter

49
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u l-arti tal-ipprogrammar.

50
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U dak li tfisser hija li dan il-kors
finalment, huwa dwar soluzzjoni ta 'problemi.

51
00:02:59,640 --> 00:03:01,849
Tabilħaqq ħafna minnkom tista
waslu mill-iskola għolja

52
00:03:01,849 --> 00:03:04,931
jew jkunu qattgħu l-aħħar ftit snin
mintix dak li xi wħud mill-ħbieb tiegħek

53
00:03:04,931 --> 00:03:06,380
ma aħħar sena jew fi klassijiet oħra.

54
00:03:06,380 --> 00:03:08,449
And yet, ir-realtà
huwa, irrelevanti dak li aħna

55
00:03:08,449 --> 00:03:11,740
do fl-aħħar tal-ġurnata f'din il-klassi,
li għaddej biex tkun madwar jissolvew il-problemi.

56
00:03:11,740 --> 00:03:14,320
>> U bħala tali, forsi tieħu
xi riassigurazzjoni fil-fatt

57
00:03:14,320 --> 00:03:16,770
li 73% ta 'l-istudenti li
jieħdu din il-klassi, kemm hawn

58
00:03:16,770 --> 00:03:20,235
fil-Yale kif ukoll fil-Harvard,
qatt ma ħadu klassi CS qabel.

59
00:03:20,235 --> 00:03:22,610
Mela jekk int seduta hawn fil
l-udjenza tal-lum mintix

60
00:03:22,610 --> 00:03:24,520
għaliex inti seduta hawn
fl-udjenza tal-lum,

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00:03:24,520 --> 00:03:26,300
jew forsi inti biss segwiti
flimkien ma 'xi ħbieb,

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jew forsi inti ħadthom kien
ftit kurjuż dwar liema

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xjenza tal-kompjuter u
ipprogrammar huwa, realizzata

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00:03:30,194 --> 00:03:32,860
li ħafna mill-klassi tiegħek biex
ix-xellug u lejn il-lemin tal inti

65
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huma ferm fl-istess demografika.

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>> U fil-fatt, jekk inħarsu
lejn l-istatistika sena aħħar

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fi ħdan il-korp student ta 'CS50, kemm
hawn u fil-Harvard, 58% tal-istudenti

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00:03:42,760 --> 00:03:44,630
jiddeskrivu lilhom infushom bħala inqas komdi.

69
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9% huwa aktar komda.

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00:03:46,090 --> 00:03:47,699
U allura 33% hija x'imkien bejniethom.

71
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U hemm l-ebda definizzjoni formali
ta 'dak li jfisser dawn bramel.

72
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Inti tip ta 'taf int
inqas komdi jekk int.

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Inti tħossok ftit inċerti
ma forsi tkun fil-klassi.

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Int ma pjuttost ċert jekk il-kompjuter
klassi xjenza huwa finalment għalik,

75
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u tirrealizza li int
fil-kumpanija tajba ħafna.

76
00:04:00,009 --> 00:04:01,800
U fil-fatt l-gradazzjoni,
u l-valutazzjoni,

77
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u l-feedback, u kollha ta 'dak
istruttura ta 'appoġġ fil-klassi

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aħħar mill-aħħar ħafna individwalizzat.

79
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Aktar minn hekk ħafna xi
klassi oħra permezz tad-disinn.

80
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U fil-fatt, dak li finalment
kwistjonijiet f'din il-klassi mhuwiex

81
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tant fejn inti tispiċċa
sa relattiv lill-oħrajn,

82
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imma fejn int, fil-ġimgħa 11 jew l-aħħar,
u relattiv għall ruħek fil-ġimgħa

83
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0 hawn ewwel tagħna.

84
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Allura dak li jfisser?

85
00:04:21,330 --> 00:04:24,750
Ukoll, dan ifisser dawk 73% tal
studenti aħħar sena li qatt ma ħadu

86
00:04:24,750 --> 00:04:26,917
klassi KEFA qabel, mill-
bidu tas-semestru li

87
00:04:26,917 --> 00:04:29,500
kienu dabbling fl-lingwa
imsejħa Scratch, li aħna lilna nfusna

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00:04:29,500 --> 00:04:30,340
se tara hawn illum.

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U mill-aħħar tal-
semestru kieku marru

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00:04:32,190 --> 00:04:34,700
permezz ta 'din il-lista sħiħa ta' sfidi.

91
00:04:34,700 --> 00:04:36,399
Nibdew bl lingwa msejħa ċ.

92
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Implimentazzjoni, x'hemm
ewwel daqqa t'għajn, li tmur

93
00:04:38,190 --> 00:04:41,010
li jkun daqsxejn ta 'sfida għall-
xi wħud, iżda pjuttost sodisfazzjoni ladarba inti

94
00:04:41,010 --> 00:04:44,510
jiksbu super mario bouncing
u 'l isfel piramida

95
00:04:44,510 --> 00:04:47,005
implimentati, għalkemm, biss
xi ħaġa imsejħa arti ASCII.

96
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Implimentazzjoni tal-aħħar year-- dak
l-istudenti aħħar sena dakinhar

97
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ma wara li kien jimplimentaw tagħhom
stess cipher Caesar u cipher vigenere.

98
00:04:53,270 --> 00:04:55,180
Allura Algoritmi ta 'kriptar
li magħhom inti tista '

99
00:04:55,180 --> 00:04:58,920
informazzjoni ġirja u mbagħad Unscramble
informazzjoni biex jibagħtu messaġġi sigrieti.

100
00:04:58,920 --> 00:05:00,010
Il-logħba tal-15.

101
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Jekk tiftakar minn
tfulija jew xi favor parti,

102
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din il-logħba plastik ftit fejn inti tmur
-numri up, down, xellug u lemin

103
00:05:05,000 --> 00:05:07,500
biex tipprova tikseb minnhom fl-ordni,
attwalment timplimenta din il-logħba

104
00:05:07,500 --> 00:05:09,640
u jsolvu l-loġika meħtieġa hemmhekk.

105
00:05:09,640 --> 00:05:11,640
U allura aħna dabbled fil
forensika sena li għaddiet.

106
00:05:11,640 --> 00:05:13,810
>> Hekk sa nofs l-semestru,
studenti li kellhom qatt

107
00:05:13,810 --> 00:05:16,130
użat tastieri tagħhom
għal dan il-għan qabel,

108
00:05:16,130 --> 00:05:19,030
kienu kitba softwer
tirkupra, biex ngħidu hekk,

109
00:05:19,030 --> 00:05:21,420
JPEGs jew ritratti
li kellna aċċidentalment

110
00:05:21,420 --> 00:05:24,430
imħassra minn diġitali
karta tal-memorja minn kamera.

111
00:05:24,430 --> 00:05:28,130
Tirkupra messaġġi sigrieti
minn ġewwa ta 'immaġni Bitmap,

112
00:05:28,130 --> 00:05:30,030
u tipi oħra bħal dawn
tal-grafika kif ukoll.

113
00:05:30,030 --> 00:05:32,770
>> Aħna mbagħad transitioned għal għoti ta
il klassi kollha dizzjunarju.

114
00:05:32,770 --> 00:05:36,330
Biss fajl test verament kbir
bil 150.000 kliem Ingliż.

115
00:05:36,330 --> 00:05:39,080
U kulħadd ġiet ikkontestata
li b'xi mod jinqraw, biex ngħidu hekk,

116
00:05:39,080 --> 00:05:40,780
dawn il-kliem fil-memorja.

117
00:05:40,780 --> 00:05:42,060
Fil-memorja tal-kompjuter.

118
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U mbagħad twieġeb mistoqsijiet
tal-formola, hija din kelma?

119
00:05:44,310 --> 00:05:44,934
Huwa dan kelma?

120
00:05:44,934 --> 00:05:45,580
Huwa dan kelma?

121
00:05:45,580 --> 00:05:47,880
Verament ftit implimentattivi
jespliċitaw kontrollur.

122
00:05:47,880 --> 00:05:50,320
U mbagħad sfida lil
xulxin bil-board-- kbir

123
00:05:50,320 --> 00:05:53,040
bord mexxej biex tara li jista '
jużaw l-inqas ammont ta 'memorja,

124
00:05:53,040 --> 00:05:56,470
fl-inqas ammont ta 'ħin li
attwalment jespliċitaw check dokumenti kbar.

125
00:05:56,470 --> 00:05:59,760
>> Aħna transitioned minn dakinhar sa
li timplimenta dawk web server stess.

126
00:05:59,760 --> 00:06:04,070
Allura ma tkunx qed tagħmel paġni web fil-lingwi
bħal HTML u CSS, jekk int familjari.

127
00:06:04,070 --> 00:06:06,360
Imma fil-fatt li timplimenta
-server li

128
00:06:06,360 --> 00:06:09,260
jisma fuq l-internet
għat-talbiet mill-browsers

129
00:06:09,260 --> 00:06:11,022
u mbagħad jirrispondu għal dawn it-talbiet.

130
00:06:11,022 --> 00:06:13,230
Mbagħad timplementa tagħna stess
e-kummerċ bħal websajt, fejn

131
00:06:13,230 --> 00:06:15,490
studenti jistgħu jixtru u jbiegħu ħażniet.

132
00:06:15,490 --> 00:06:18,590
Tpinġija f'ħin kważi reali
stock kwotazzjonijiet minn Yahoo Finanzi.

133
00:06:18,590 --> 00:06:21,200
U tippermetti lill-istudenti biex tara
kif portafoll tagħhom tiżviluppa.

134
00:06:21,200 --> 00:06:23,570
U mbagħad finalment maxx up
ta 'Google News u Google

135
00:06:23,570 --> 00:06:26,540
Mapep li permezz tagħha l-istudenti
billi tul billi termini tmiem

136
00:06:26,540 --> 00:06:30,110
kellha l-kapaċità li ikklikkja, u
tondi, u tfittxija fuq mappa Google.

137
00:06:30,110 --> 00:06:32,060
U mbagħad tara l
l-artikoli aħbarijiet li

138
00:06:32,060 --> 00:06:33,940
huma prossimali għal dawk iż-żoni partikolari.

139
00:06:33,940 --> 00:06:36,180
Allura verament jmorru minn żero sa 60.

140
00:06:36,180 --> 00:06:39,420
>> U tul it-triq li għandha dak li kellna
sena li għaddiet imsejħa, żidiet Hacker.

141
00:06:39,420 --> 00:06:41,211
Dik jgħollu l-bar
aktar għal dawk minnkom

142
00:06:41,211 --> 00:06:44,390
li tista 'tajjeb ħafna jkollhom tajba
ammont ta 'esperjenza li hija f'dak 9%

143
00:06:44,390 --> 00:06:45,349
ta 'aktar komda.

144
00:06:45,349 --> 00:06:47,140
Allura jirrealizzaw li hemm
limitu għoli ħafna

145
00:06:47,140 --> 00:06:49,200
anke fi ħdan dawk
sfidi għall-istudenti

146
00:06:49,200 --> 00:06:50,660
ġejjin minn sfond differenti.

147
00:06:50,660 --> 00:06:52,618
Minħabba li fl-aħħar tal
il-ġurnata, aħna qed finalment

148
00:06:52,618 --> 00:06:54,910
iffukat sempliċement fuq dan.

149
00:06:54,910 --> 00:06:57,010
>> Imma dak ma dan
mean, soluzzjoni ta 'problemi?

150
00:06:57,010 --> 00:06:59,100
Mela ejja jipproponi li
aħna jiddistillaw dan bħal dan.

151
00:06:59,100 --> 00:07:01,550
Allura sabiex jissolvew problemi huwa verament
biss dan it-tip ta 'stampa.

152
00:07:01,550 --> 00:07:04,675
Allura inti ħadthom ltqajna l-inputs għal xi problema,
xi ħaġa li inti fil-fatt tixtieq li ssolvi.

153
00:07:04,675 --> 00:07:07,020
L-għan huwa li tikseb riżultati,
soluzzjoni għal din il-problema.

154
00:07:07,020 --> 00:07:09,950
U allura fin-nofs huwa
dak li aħna ser sejħa kaxxa sewda.

155
00:07:09,950 --> 00:07:13,970
Inti ma neċessarjament jaf jew saħansitra
kura x'hemm ġewwa li kaxxa s-sewda.

156
00:07:13,970 --> 00:07:16,670
Kulma għandek tkun taf li meta
inti għalf input fis dan,

157
00:07:16,670 --> 00:07:19,890
inti nisperaw tikseb l-output
jew soluzzjoni minnha.

158
00:07:19,890 --> 00:07:22,380
U filwaqt li llum aħna ser tħares
kemm fil-inputs u l-outputs,

159
00:07:22,380 --> 00:07:24,838
Aħna ser tul, u madwar id-
Matul is-Simestru kollu,

160
00:07:24,838 --> 00:07:26,880
tiffoka fuq x'hemm ġewwa dik il-kaxxa.

161
00:07:26,880 --> 00:07:30,040
>> U fih se tkun
xi ħaġa imsejħa algoritmi.

162
00:07:30,040 --> 00:07:33,300
Istruzzjonijiet pass pass għall
attwalment jissolvew xi problemi.

163
00:07:33,300 --> 00:07:35,090
Imma x'hemm eżempju ta 'xi inputs?

164
00:07:35,090 --> 00:07:37,840
Allura forsi xi ħaġa sempliċi fil-
bidu ta 'kull sena skolastika, xi ħadd

165
00:07:37,840 --> 00:07:39,090
tista 'tixtieq li tieħu attendenza.

166
00:07:39,090 --> 00:07:42,030
Allura nistgħu nagħmlu wieħed, tnejn,
tlieta, erba ', ħames, sitt,

167
00:07:42,030 --> 00:07:44,010
u kif se I iżommu
kont ta 'dik l-informazzjoni.

168
00:07:44,010 --> 00:07:46,051
I tista 'biss tmur wieħed, tnejn,
tlieta, erba ', ħames, sitta.

169
00:07:46,051 --> 00:07:47,720
U biss użu tip ta 'ċifri wieħed.

170
00:07:47,720 --> 00:07:51,210
>> Jew I jistgħu attwalment jirreġistraw
dan it-terminu ftit itwal.

171
00:07:51,210 --> 00:07:53,340
U kif nista jirrappreżentaw kollu
l-bnedmin f'din il-kamra?

172
00:07:53,340 --> 00:07:54,900
Well, I tista 'tagħmel xi ħaġa simili, OK.

173
00:07:54,900 --> 00:07:56,070
Nara persuna waħda.

174
00:07:56,070 --> 00:07:56,600
Kull dritt.

175
00:07:56,600 --> 00:08:01,180
Nara persuna oħra, li
terza persuna, u oħrajn.

176
00:08:01,180 --> 00:08:04,070
Imma l-ebda wieħed jgħodd nies bħal dan.

177
00:08:04,070 --> 00:08:06,952
Allura litteralment, ħafna minna, jekk aħna qed
anki jmorru biex tiġbed xejn affattu,

178
00:08:06,952 --> 00:08:08,910
huma probabbilment se jmorru
wieħed, tnejn, tlieta, erba,

179
00:08:08,910 --> 00:08:14,240
forsi jiksbu fancy ftit, ħamsa, sitta,
seba ', tmien, disa', għaxar u oħrajn.

180
00:08:14,240 --> 00:08:16,960
>> U li attwalment
sistema, imsejħa unary.

181
00:08:16,960 --> 00:08:20,549
Uno, bħal UNO jimplika waħda, fejn inti
biss ikollhom ittra waħda mill-alfabett.

182
00:08:20,549 --> 00:08:21,840
You ħadthom biss ltqajna din il-marka hash.

183
00:08:21,840 --> 00:08:24,570
UI, għall-effiċjenza, biss ġibdet
dawn il-marki hash, finalment

184
00:08:24,570 --> 00:08:25,500
Linji kif dritti.

185
00:08:25,500 --> 00:08:27,666
Imma I jistgħu fasslu għalihom
kif stick figuri ftit.

186
00:08:27,666 --> 00:08:29,550
Fejn jirrappreżentaw
persuna waħda, l-input wieħed,

187
00:08:29,550 --> 00:08:32,210
I biss jiġbed stick
figura jew marka hash.

188
00:08:32,210 --> 00:08:33,910
Iżda dan mhux kollox li espressiva.

189
00:08:33,910 --> 00:08:38,020
>> Jekk kollha jien huwa li dawn hash
marki, let stick figuri biss,

190
00:08:38,020 --> 00:08:41,410
kif jista I jirrappreżentaw
xi ħaġa bħall-numru 15?

191
00:08:41,410 --> 00:08:43,050
Jew 15 nies fil-kamra?

192
00:08:43,050 --> 00:08:48,740
I jista 'jkollhom biex jagħmlu xi ħaġa simili 1,
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,

193
00:08:48,740 --> 00:08:51,270
14, 15.

194
00:08:51,270 --> 00:08:52,830
Hija biss ma iskala tajjeb ħafna.

195
00:08:52,830 --> 00:08:55,730
Peress li l-inputs nikseb kbira, aħna
bżonn ta 'sistema aħjar minn hekk.

196
00:08:55,730 --> 00:08:57,910
>> U jirriżulta li l-
sistema li kompjuters jużaw

197
00:08:57,910 --> 00:09:00,510
mhux kollha li differenti
minn dak li inti u naf.

198
00:09:00,510 --> 00:09:03,301
Fil-fatt, ħafna nies f'dan kamra,
anki jekk inti fost dawk inqas

199
00:09:03,301 --> 00:09:06,300
komdu, ma neċessarjament jaf
kif Mac tiegħek jew PC tassew jaħdem,

200
00:09:06,300 --> 00:09:09,810
inti probabilment ħadthom mill-inqas jinstemgħu, li
taħt il-barnuża huma 0 u 1 ta.

201
00:09:09,810 --> 00:09:11,390
L-hekk imsejħa sistema binarja.

202
00:09:11,390 --> 00:09:15,340
Allura fil-fatt, kompjuters għandhom aktar minn
biss marki hash fil-vokabularju tagħhom,

203
00:09:15,340 --> 00:09:17,450
iżda mhux kemm ta '
vokabularju kif aħna bnedmin.

204
00:09:17,450 --> 00:09:19,210
>> Tabilħaqq, aħna bnedmin ma jużawx binarja.

205
00:09:19,210 --> 00:09:21,160
Bi jfisser 2, 0 u 1.

206
00:09:21,160 --> 00:09:24,140
Iżda deċimali, id-Deca
jiġifieri 10, 0 sa 9.

207
00:09:24,140 --> 00:09:27,660
Allura aħna għandna ħafna aktar espressiva
kapaċitajiet fil-dinja tal-bniedem normali tagħna.

208
00:09:27,660 --> 00:09:31,720
Imma I d jargumentaw li dawn is-sistemi,
binarju, u deċimali, u kollox

209
00:09:31,720 --> 00:09:35,290
fl bejn u lil hinn, huma
fil-fatt kollha pjuttost familjari.

210
00:09:35,290 --> 00:09:39,650
Per eżempju, jikkunsidraw
F'dan l-eżempju hawn, 123.

211
00:09:39,650 --> 00:09:43,850
Allura dan huwa verament, naturalment,
numru nafu bħala 123.

212
00:09:43,850 --> 00:09:47,160
Imma kollha I biss ġibdet kien biss dan
mudell ta 'simboli, glyphs biex ngħidu hekk.

213
00:09:47,160 --> 00:09:49,100
Tip ta 'forom fuq il-bord fl ġibs.

214
00:09:49,100 --> 00:09:52,951
>> Iżda għaliex aħna immedjatament u
intuwittivament jifhmu dan bħala 123?

215
00:09:52,951 --> 00:09:54,700
Ukoll, jekk inti kienu simili
lili fl-iskola grad,

216
00:09:54,700 --> 00:09:59,920
inti probabilment tgħallmu li dan huwa l-
Kolonna 1s, dan huwa l-kolonna 10s,

217
00:09:59,920 --> 00:10:01,330
dan huwa l-kolonna 100s.

218
00:10:01,330 --> 00:10:02,860
U għaliex hi li utli?

219
00:10:02,860 --> 00:10:06,440
Ukoll, huwa aritmetika sempliċi inti issa
tagħmel biex tikseb minn mudell ta 'simboli

220
00:10:06,440 --> 00:10:08,940
għal numru nifhmu intuwittivament.

221
00:10:08,940 --> 00:10:14,160
Huwa dak, 100 darba 1, u mbagħad
10 darbiet 2, u 1 ħinijiet 3,

222
00:10:14,160 --> 00:10:17,860
li naturalment huwa biss 100, u
dan huwa 20, u dan huwa tlieta.

223
00:10:17,860 --> 00:10:19,740
U hekk jekk aħna żid dawk together-- ah.

224
00:10:19,740 --> 00:10:23,880
Allura fih tinsab il-tip ta raġunament
wara għaliex dan is-sett ta 'simboli

225
00:10:23,880 --> 00:10:26,550
tfisser xi ħaġa reali u numeriku.

226
00:10:26,550 --> 00:10:32,030
>> Ukoll, kompjuters jagħmlu l-istess ħaġa eżatt,
iżda huma biss jistgħu jgħoddu bħala għoli daqs wieħed.

227
00:10:32,030 --> 00:10:34,400
Billi I kien kapaċi
jgħodd bħala għoli daqs tlieta.

228
00:10:34,400 --> 00:10:37,380
U fil-fatt, jekk I jinżammu għaddejjin I jistgħu
jogħla sa disa f'din is-sistema.

229
00:10:37,380 --> 00:10:40,430
Kompjuters biss ikollhom żerijiet
u dawk fl-alfabett tagħhom.

230
00:10:40,430 --> 00:10:41,410
>> Allura dak li jfisser?

231
00:10:41,410 --> 00:10:46,900
Ukoll, dan ifisser biss li jekk il-kompjuter
irid jirrappreżenta, jiġifieri l-għadd 0,

232
00:10:46,900 --> 00:10:51,300
forsi bl-użu tliet characters-- tlieta
ittri tal-alfabett biex ngħidu hekk,

233
00:10:51,300 --> 00:10:53,050
li kif il-kompjuter jirrappreżenta 0.

234
00:10:53,050 --> 00:10:54,620
Allura mhux kollha li scary s'issa.

235
00:10:54,620 --> 00:10:56,450
Huwa eżattament dak li aħna bnedmin ser jagħmlu.

236
00:10:56,450 --> 00:10:59,410
U fil-fatt, ħafna minna se biss
jinjora l-żerijiet ewlenin xorta waħda.

237
00:10:59,410 --> 00:11:01,640
>> A kompjuter, jekk trid
li jaħżen in-numru 1,

238
00:11:01,640 --> 00:11:03,330
jinstabx se tagħmel dan.

239
00:11:03,330 --> 00:11:05,630
U ta 'kompjuter li jaħżen
in-numru 2 mhux

240
00:11:05,630 --> 00:11:09,280
se jagħmlu s-sistema unary,
li jiena allużjoni għall qabel.

241
00:11:09,280 --> 00:11:11,360
Huwa fil-fatt se tagħmel dan.

242
00:11:11,360 --> 00:11:13,570
U dan huwa probabbilment
fejn l-mudell jibda

243
00:11:13,570 --> 00:11:15,570
biex isiru anqas ovvja għall folks aktar.

244
00:11:15,570 --> 00:11:18,580
C'est 2, dan huwa 3.

245
00:11:18,580 --> 00:11:21,600
Ħaġa kurjuża, dan issa 4 hu.

246
00:11:21,600 --> 00:11:24,120
U issa huwa verament ma
jidhru li huma forsi cryptic,

247
00:11:24,120 --> 00:11:26,762
iżda mhux jekk nikkunsidraw
dak binarja verament mezzi.

248
00:11:26,762 --> 00:11:28,720
Dan ifisser li inti għandek żewġ
ittri ta 'alfabett tiegħek.

249
00:11:28,720 --> 00:11:31,940
Allura żewġ karattri possibbli
għal kull placeholder.

250
00:11:31,940 --> 00:11:35,970
>> Allura li verament ifisser li aħna qed tmur
li bżonn post 1s, jew il-post 2s,

251
00:11:35,970 --> 00:11:40,800
post 4s u mbagħad
8, u 16, 32, u 64.

252
00:11:40,800 --> 00:11:42,290
U x'inhu l-differenza hemmhekk?

253
00:11:42,290 --> 00:11:47,150
Bħal dawn huma 1, 2, 4, 8, 16, 32, 64.

254
00:11:47,150 --> 00:11:50,690
U qabel kellna 110, 100,000, 10,000.

255
00:11:50,690 --> 00:11:53,170
X'hemm-xebh hemmhekk?

256
00:11:53,170 --> 00:11:54,940
U x'inhu l-mudell?

257
00:11:54,940 --> 00:11:55,505
Yeah.

258
00:11:55,505 --> 00:11:57,380
STUDENT: Setgħat ta '2
minflok poteri ta '10.

259
00:11:57,380 --> 00:11:57,660
DAVID Malan: Yeah.

260
00:11:57,660 --> 00:11:59,290
Setgħat ta '2 minflok poteri ta' 10.

261
00:11:59,290 --> 00:12:02,160
U hekk jekk jien ridt li jżommu
għaddejjin, 8, 16s u għalhekk forth--

262
00:12:02,160 --> 00:12:05,822
imma issa jekk għandek dan it-tip
ta clue, issa s-sistema binarja

263
00:12:05,822 --> 00:12:07,280
huwa attwalment pjuttost sempliċi.

264
00:12:07,280 --> 00:12:10,910
Għaliex hija din il-mudell ta '0 tal
fid-dinja tal-kompjuters 0?

265
00:12:10,910 --> 00:12:14,910
Ukoll, għaliex dan huwa 4 darbiet 0, 2
ħinijiet 0, 1 darbiet 0 u ikollok 0.

266
00:12:14,910 --> 00:12:16,650
>> Għaliex hija din in-numru 1?

267
00:12:16,650 --> 00:12:20,070
Istess raġunament, iżda issa aħna
ikollhom 1 fil-kolonna 1.

268
00:12:20,070 --> 00:12:21,840
Għaliex hija din il-2?

269
00:12:21,840 --> 00:12:24,450
Għandna 1 fil-kolonna 2s.

270
00:12:24,450 --> 00:12:30,190
U kif mela jiena nirrappreżenta
jgħidu, in-numru 7 fil binarju?

271
00:12:30,190 --> 00:12:31,324
Say louder.

272
00:12:31,324 --> 00:12:32,170
>> STUDENT: Tliet 1s.

273
00:12:32,170 --> 00:12:33,086
>> DAVID Malan: Tliet 1s.

274
00:12:33,086 --> 00:12:37,110
Allura 1, 1, 1 għax aħna biss bżonn
4 flimkien ma '2 flimkien ma' 1 tagħti me 7.

275
00:12:37,110 --> 00:12:37,610
Kull dritt.

276
00:12:37,610 --> 00:12:40,410
Allura minn hemm kif nistgħu
jirrappreżentaw 8 bi 3 placeholders?

277
00:12:40,410 --> 00:12:43,310

278
00:12:43,310 --> 00:12:43,922
Yeah.

279
00:12:43,922 --> 00:12:45,070
>> STUDENT: 1, 0, 0, 0.

280
00:12:45,070 --> 00:12:46,970
>> DAVID Malan: Yeah 1, 0, 0, 0.

281
00:12:46,970 --> 00:12:49,380
And yet forsi, I tip
tal teknikament bżonn

282
00:12:49,380 --> 00:12:52,380
li żżid placeholder ieħor lill-bord.

283
00:12:52,380 --> 00:12:55,480
Jekk irrid li jitwaħħal li jien tassew
bżonn tagħmel xi ħaġa bħal din.

284
00:12:55,480 --> 00:12:58,990
So I attwalment bżonn tuża issa
il-kolonna 8S, u li l-multa.

285
00:12:58,990 --> 00:13:02,680
Imma l-ħaġa kurjuż fl-informatika huwa
li li għaddej biex ispiża us xi ħaġa.

286
00:13:02,680 --> 00:13:04,390
Ikollok bżonn aktar RAM fil-kompjuter tiegħek issa.

287
00:13:04,390 --> 00:13:06,348
Ikollok bżonn memorja aktar
għaliex għandek bżonn xi ħaġa

288
00:13:06,348 --> 00:13:09,650
fiżika biex jaħżnu dik
bit addizzjonali, biex ngħidu hekk.

289
00:13:09,650 --> 00:13:10,700
binarja ċifri.

290
00:13:10,700 --> 00:13:13,260
U fil-fatt dak kollu li ġara
hawn, bħas-sistema deċimali,

291
00:13:13,260 --> 00:13:17,380
jekk inżommu żżid in-numri up u aġġornata
u sa, immorru 5-6 sa 7-8

292
00:13:17,380 --> 00:13:19,330
huwa simili jġorru l-1, litteralment.

293
00:13:19,330 --> 00:13:21,940
U mbagħad kull ħaġa oħra
imur lura għal żero.

294
00:13:21,940 --> 00:13:25,870
>> Imma kif nistgħu attwalment jirrappreżentaw
dawn l-affarijiet fiżikament fil-kompjuter?

295
00:13:25,870 --> 00:13:29,380
Ukoll, fl-aħħar tal-ġurnata, l-uniku
input fiżika nidħlu kompjuter tiegħi

296
00:13:29,380 --> 00:13:33,630
hawnhekk hija din korda enerġija, sabiex
elettriku jew elettroni mill-ħajt.

297
00:13:33,630 --> 00:13:36,920
U hekk kif nista 'nikseb minn xi ħaġa
fiżiċi bħal dik li attwalment

298
00:13:36,920 --> 00:13:40,630
li jirrappreżenta idea bħal din minflok.

299
00:13:40,630 --> 00:13:41,930
>> Ukoll, dak li nistgħu nagħmlu?

300
00:13:41,930 --> 00:13:45,560
Aħna tista 'tikkunsidra li, id-dritt,
forsi jekk elettriku li jirriżultaw

301
00:13:45,560 --> 00:13:47,420
I jistgħu jaħżnuh u jżommuh fuqha.

302
00:13:47,420 --> 00:13:49,250
U jekk jien azjenda fuq
għal xi elettriku,

303
00:13:49,250 --> 00:13:51,700
thats biss ser
arbitrarjament jirrappreżentaw 1.

304
00:13:51,700 --> 00:13:53,997
U jekk I iġbed il-plagg
u hemm xejn hemmhekk,

305
00:13:53,997 --> 00:13:56,330
inti taf li jinsab biss jmorru
li arbitrarjament jirrappreżenta 0.

306
00:13:56,330 --> 00:13:57,700
>> Mela jekk xi ħaġa hemm, 1.

307
00:13:57,700 --> 00:13:59,280
Jekk xejn hemm, 0.

308
00:13:59,280 --> 00:14:01,420
Jew inti tista 'tagħmel din l
ftit aktar viżwali.

309
00:14:01,420 --> 00:14:02,704
Hawnhekk huwa 0.

310
00:14:02,704 --> 00:14:05,370
M'hemm xejn li għaddejjin interessanti
fuq dwar il-dahar tal-telefon tiegħi.

311
00:14:05,370 --> 00:14:08,690
Imma jekk jien jippermettu ftit
daqsxejn ta 'elettriku għall-fluss,

312
00:14:08,690 --> 00:14:11,490
anki jekk huwa qawwi ftit
fil hawn, flashlight tiegħi marru fuq.

313
00:14:11,490 --> 00:14:15,840
Hekk jien ħażna ħlas u Ergo,
din id-telefon issa jirrappreżenta 1.

314
00:14:15,840 --> 00:14:17,700
Allura 0 1.

315
00:14:17,700 --> 00:14:23,630
>> Allura ma 1 iPhone kif għoli nista
count jużaw dan it-tip ta 'approċċ?

316
00:14:23,630 --> 00:14:24,490
I tfisser li 1.

317
00:14:24,490 --> 00:14:25,900
Huwa mhux kollha li konvinċenti.

318
00:14:25,900 --> 00:14:27,170
Allura x'jista 'jsir iktar li nagħmlu?

319
00:14:27,170 --> 00:14:31,180
Well ejja ara, huwa xi ħadd fuq tagħhom
telefon dritt issa li stajt jissellef?

320
00:14:31,180 --> 00:14:33,800
Kull min għandu cell
bi flashlight built-in?

321
00:14:33,800 --> 00:14:34,969
Mejju I jissellef?

322
00:14:34,969 --> 00:14:36,010
I m'għandhomx bżonn dan imsakkar.

323
00:14:36,010 --> 00:14:36,510
Kull dritt.

324
00:14:36,510 --> 00:14:37,150
Grazzi.

325
00:14:37,150 --> 00:14:37,780
Let me jissellef dan l.

326
00:14:37,780 --> 00:14:38,279
Kull dritt.

327
00:14:38,279 --> 00:14:45,570
Mela jekk jien issa iscroll u hawn,
dak li jien tirrappreżenta issa?

328
00:14:45,570 --> 00:14:46,070
Yeah.

329
00:14:46,070 --> 00:14:49,350
Allura huwa ta 'tliet għaliex dan huwa fl-
Kolonna 1s, dan huwa fil-kolonna 2s.

330
00:14:49,350 --> 00:14:50,480
Allura 1 flimkien ma '2 huwa 3.

331
00:14:50,480 --> 00:14:53,410
U allura jekk irridu tipprova tikseb
verament creative-- oh, grazie.

332
00:14:53,410 --> 00:14:54,690
preemptive ħafna.

333
00:14:54,690 --> 00:14:55,560
Kull dritt.

334
00:14:55,560 --> 00:14:57,100
I issa għandhom tliet iPhones.

335
00:14:57,100 --> 00:14:58,810
Kull dritt.

336
00:14:58,810 --> 00:15:02,500
>> U issa this-- jien mhux ser
do xi ulterjuri minn dan.

337
00:15:02,500 --> 00:15:04,380
What am I li tirrapreżenta issa?

338
00:15:04,380 --> 00:15:05,090
Just Sevens.

339
00:15:05,090 --> 00:15:08,000
Imma I meħtieġa fiżikament
memorja aktar f'dan il-każ.

340
00:15:08,000 --> 00:15:08,920
Imma li kollox huwa.

341
00:15:08,920 --> 00:15:12,870
Inti tista 'taħseb x'inhu għaddej on--
nirringrazzja you-- ġewwa tal-mobile tieghek

342
00:15:12,870 --> 00:15:16,240
bħala sempliċement swiċċ li l-
qed jinxtegħlu u jintfew.

343
00:15:16,240 --> 00:15:18,350
>> U jekk inti stajt qatt semgħu
il transistor kelma.

344
00:15:18,350 --> 00:15:21,312
Jew jekk inti stajt qatt semgħu l-
kummerċjalizzazzjoni jitkellmu Intel ġewwa,

345
00:15:21,312 --> 00:15:24,270
li l-jitkellem it-tip ta 'hardware
li l-ġewwa ta 'kompjuter tiegħek.

346
00:15:24,270 --> 00:15:26,707
Intel jagħmel mikroproċessuri,
unitajiet ċentrali ta 'proċessar,

347
00:15:26,707 --> 00:15:28,790
li huma simili l-imħuħ
ġewwa tal-kompjuter tiegħek.

348
00:15:28,790 --> 00:15:30,640
U dawn il CPUs u
affarijiet li qed konnessi

349
00:15:30,640 --> 00:15:32,740
li jkollhom lottijiet u lottijiet ta 'swiċċijiet ċkejkna.

350
00:15:32,740 --> 00:15:36,440
Miljuni, biljuni ta 'swiċċijiet
li jistgħu jew fuq jew barra.

351
00:15:36,440 --> 00:15:38,840
>> Allura kompjuters, Thankfully,
bħal MACs tagħna u PCs,

352
00:15:38,840 --> 00:15:43,830
jista 'joqgħod b'mod għola minn 7 jew 8
minħabba li jkunu mod aktar minn tliet

353
00:15:43,830 --> 00:15:44,660
jew erba 'bits.

354
00:15:44,660 --> 00:15:48,140
B'mod aktar mill-ekwivalenti ta 'l-
tliet flashlights li aħna biss kellhom.

355
00:15:48,140 --> 00:15:52,110
Imma issa din il tibda tikseb
pjuttost uninteresting malajr.

356
00:15:52,110 --> 00:15:55,810
Jekk jien issa jridu effettivament ikun jista
biex tagħmel xi ħaġa aktar interessanti,

357
00:15:55,810 --> 00:16:00,340
Irrid li tkun tista 'tiżdied
għal xi ħaġa bħal din.

358
00:16:00,340 --> 00:16:03,604
>> Allura ASCII, mhuwiex verament utli
akronimu, iżda American Standard Kodiċi

359
00:16:03,604 --> 00:16:04,770
għall-Informazzjoni Interchange.

360
00:16:04,770 --> 00:16:07,450
Dan ifisser biss, xi snin
ilu aħna bnedmin iddeċieda,

361
00:16:07,450 --> 00:16:10,724
inti taf liema, irridu jkunu jistgħu jagħmlu
aktar ma 'kompjuters milli sempliċiment numri.

362
00:16:10,724 --> 00:16:12,890
Aħna ma rridux li ftit
jkun kalkolaturi għaljin,

363
00:16:12,890 --> 00:16:16,730
aħna tixtieq li tkun tista 'tagħmel affarijiet simili
word-processing, għalkemm sempliċiment ħafna.

364
00:16:16,730 --> 00:16:20,030
Aktar tard kellna email u mezzi oħra bħal dawn.

365
00:16:20,030 --> 00:16:23,700
>> U għalhekk il-dinja iddeċieda xi snin
ilu skond din ASCII is-sistema,

366
00:16:23,700 --> 00:16:24,770
taf xiex?

367
00:16:24,770 --> 00:16:26,970
F'ċerti tipi ta '
Programmi kwalunkwe ħin li inti

368
00:16:26,970 --> 00:16:30,649
ara l-ekwivalenti tan-numru
65, bħall-mudell ta 'bits.

369
00:16:30,649 --> 00:16:32,440
U nistgħu nagħmlu l
matematika hawn fuq il-bord.

370
00:16:32,440 --> 00:16:34,450
Il-mudell ta 'bits li jirrappreżentaw 65.

371
00:16:34,450 --> 00:16:37,240
Ma naħsibx li bħala 65 fil deċimali.

372
00:16:37,240 --> 00:16:41,620
Jaħsbu li bħala arbitrarju, iżda
globalment, b'mod konsistenti bħala l-kapital

373
00:16:41,620 --> 00:16:42,201
A.

374
00:16:42,201 --> 00:16:43,950
U allura l-dinja
iddeċieda, inti taf liema?

375
00:16:43,950 --> 00:16:45,630
Ejja tieħu xejra oħra ta 'bits.

376
00:16:45,630 --> 00:16:47,770
U jekk aħna qatt tara l
Numru 66, ejja biss

377
00:16:47,770 --> 00:16:50,573
jassumi li dan huwa l-
kapital B. Fast quddiem sa H

378
00:16:50,573 --> 00:16:55,510
u jien, jekk tara 72 jew 73, dik
għandu jkun H u I, rispettivament.

379
00:16:55,510 --> 00:16:57,780
U hekk sakemm il-sħiħ
dinja jaqbel fuq din.

380
00:16:57,780 --> 00:17:01,342
B'tali mod li meta inti tirċievi email, jew
inti se tikseb fajl fuq USB stick,

381
00:17:01,342 --> 00:17:03,800
jew xi ħaġa bħal that-- meta
tara dak il-mudell ta 'bits,

382
00:17:03,800 --> 00:17:06,980
inti taf li dan għandu jkun dan
ittra jew xi ittra ohra.

383
00:17:06,980 --> 00:17:08,620
>> Imma hija kuntest speċifiku, id-dritt.

384
00:17:08,620 --> 00:17:12,250
Programm ta 'email jistgħu jinterpretaw
dawn l-affarijiet kif karattri,

385
00:17:12,250 --> 00:17:15,760
iżda kalkolatur graphs jew
calculator jista 'jirrappreżenta jew jinterpretaw

386
00:17:15,760 --> 00:17:18,370
dawn l-affarijiet, naturalment, bħala ittri.

387
00:17:18,370 --> 00:17:21,610
>> Allura ma 'dak imsemmi, ir-reviżjoni ftit malajr.

388
00:17:21,610 --> 00:17:25,440
Din hija forsi tlieta karattru
e-mail li kien mibgħuta lili.

389
00:17:25,440 --> 00:17:27,990
Taht il-barnuża dan kollu fil
0s u 1s, imma aħna ma kura.

390
00:17:27,990 --> 00:17:31,580
Aħna ser tibda astratt
fuq mill-0s u 1s lill ittri.

391
00:17:31,580 --> 00:17:36,830
U jekk nara mudell ta 0s u 1s li
verament jirrappreżentaw 72, ħjiel, ħjiel, 73,

392
00:17:36,830 --> 00:17:38,866
u mbagħad 33, x'inhu l-messaġġ?

393
00:17:38,866 --> 00:17:40,348
>> STUDENT: [inaudible]

394
00:17:40,348 --> 00:17:42,639
DAVID Malan: Mela jekk inti taħseb
lura ftit mument ilu, HI

395
00:17:42,639 --> 00:17:47,210
kien il-messaġġ I kien qed jipprova
jikkomunikaw hawnhekk għaliex H hija 72,

396
00:17:47,210 --> 00:17:50,925
I huwa 73, u issa 33-- inti ma tkunx
bilfors jafu dan minn qabel,

397
00:17:50,925 --> 00:17:53,800
iżda jirriżulta jekk inti fil-fatt
tara aktar ta 'l-chart u s-sistema

398
00:17:53,800 --> 00:17:56,800
li l-umanità miftiehma snin
ilu, huwa biss punt exclamation.

399
00:17:56,800 --> 00:18:01,590
U fil-fatt, hemm mudell ta '
simboli u numri għal kull karattru

400
00:18:01,590 --> 00:18:03,849
li inti jista 'jkollhom fuq it-tastiera tiegħek.

401
00:18:03,849 --> 00:18:04,389
>> Kull dritt.

402
00:18:04,389 --> 00:18:05,660
Ejja astratta ulterjuri.

403
00:18:05,660 --> 00:18:09,380
Jekk ma rridux li jkollhom biss
affarijiet simili numri u ittri,

404
00:18:09,380 --> 00:18:11,420
aħna fil-fatt tixtieq li jimplimentaw grafika.

405
00:18:11,420 --> 00:18:13,351
Ukoll, jekk inti stajt qatt
sema 'l-akronimu RGB.

406
00:18:13,351 --> 00:18:15,559
Huwa tip ta 'datata issa, iżda
huwa għadu tip ta 'hemmhekk.

407
00:18:15,559 --> 00:18:17,380
RGB huwa aħmar, aħdar, blu.

408
00:18:17,380 --> 00:18:19,380
U huwa biss sistema
ta 'tgħid, inti taf liema,

409
00:18:19,380 --> 00:18:21,650
ejja tuża t-tliet settijiet ta 'bits.

410
00:18:21,650 --> 00:18:25,280
Sett ta '8 bits, sett ieħor ta' 8
bits, u sett ieħor ta '8 bits.

411
00:18:25,280 --> 00:18:27,710
U ejja jużaw dawk bits
li jaħżen kemm aħmar aħna

412
00:18:27,710 --> 00:18:31,430
trid fuq l-iskrin tagħna, kemm
aħdar irridu fuq l-iskrin tagħna,

413
00:18:31,430 --> 00:18:34,070
u kemm blu irridu fuq l-iskrin tagħna.

414
00:18:34,070 --> 00:18:37,860
U dan ifisser biss li jekk inti
jkollu lot-- numru kbir ta aħmar,

415
00:18:37,860 --> 00:18:39,200
dan ifisser jagħtu me ħafna ta 'aħmar.

416
00:18:39,200 --> 00:18:41,658
Jekk għandek numru kbir ta
aħdar, tagħti me ħafna ta 'aħdar.

417
00:18:41,658 --> 00:18:44,660
U jekk ikollok biss ftit
ta blu jew numru żgħir bħal 33,

418
00:18:44,660 --> 00:18:45,960
tagħti me ftit ta 'blu.

419
00:18:45,960 --> 00:18:49,720
U jekk inti jiġri li jikkombinaw dawk
tliet kobor, biex ngħidu hekk,

420
00:18:49,720 --> 00:18:53,160
ikollok this-- inti bilkemm tista 'tara fuq
il-projector hawn, iżda dan murky

421
00:18:53,160 --> 00:18:54,630
dell isfar jew kannella.

422
00:18:54,630 --> 00:18:58,590
>> Iżda dan huwa li wieħed jgħid, bl-użu li
mudell tat-8 + 8 flimkien flimkien ma 8--

423
00:18:58,590 --> 00:19:01,710
dak il-mudell ta '24 bits
huwa kif kompjuter ikun

424
00:19:01,710 --> 00:19:06,460
jaħżnu dik dell isfar f'waħda
ċkejkna dot pixel fuq l-iskrin.

425
00:19:06,460 --> 00:19:10,570
Allura konna marret minn 0s u 1s li deċimali
numri għall-ittri tal-alfabett.

426
00:19:10,570 --> 00:19:13,680
Jew aktar interessanti, tikek kkulurita.

427
00:19:13,680 --> 00:19:16,200
>> Ukoll, liema naturalment mbagħad taqa jmiss?

428
00:19:16,200 --> 00:19:19,040
Ukoll, dak li hija immaġni li inti
tara fuq Facebook jew tikseb fl-email?

429
00:19:19,040 --> 00:19:20,172
Jew affarijiet simili?

430
00:19:20,172 --> 00:19:22,130
X'inhi d-definizzjoni
teknikament ta 'immaġni?

431
00:19:22,130 --> 00:19:25,090

432
00:19:25,090 --> 00:19:27,710
Yeah.

433
00:19:27,710 --> 00:19:31,270
X'inhu immaġni magħmul minn jekk inti
tfittex verament qrib lejn l-iskrin tiegħek?

434
00:19:31,270 --> 00:19:31,770
Yeah.

435
00:19:31,770 --> 00:19:33,186
Huwa biss mazz sħiħ ta 'pixels.

436
00:19:33,186 --> 00:19:35,220
Fil-fatt, jekk inti tieħu tiegħek
laptop forsi aktar tard,

437
00:19:35,220 --> 00:19:37,180
u ħarsa verament qrib
fil it-- jiddependi

438
00:19:37,180 --> 00:19:40,370
dwar kemm jiswew il-laptop huwa u
kif għolja ta 'kwalità l-iskrin huwa,

439
00:19:40,370 --> 00:19:43,480
inti tista 'tajjeb ħafna' tara kollha ta '
-tikek ftit fuq l-iskrin.

440
00:19:43,480 --> 00:19:45,890
>> U dawk tikek jew pixel,
li jfisser li hemm

441
00:19:45,890 --> 00:19:49,810
24 bits li jirrappreżentaw kull pixel f'dak
ritratt li inti tara fuq Facebook,

442
00:19:49,810 --> 00:19:52,049
jew li inti biss ħa
fuq iPhone tiegħek reċentement.

443
00:19:52,049 --> 00:19:54,090
U hekk dan huwa kif aħna tikseb
għal affarijiet simili grafika.

444
00:19:54,090 --> 00:19:55,120
Ukoll, x'hemm video?

445
00:19:55,120 --> 00:19:58,660
A video huwa biss sett ta 'grafika
li jtajru l-iskrin mill-ġdid

446
00:19:58,660 --> 00:19:59,780
u għal darb'oħra u għal darb'oħra.

447
00:19:59,780 --> 00:20:04,080
U hekk videos tassew, huma biss l-mudelli
ta 'bits li jirrappreżentaw grilji, ringieli

448
00:20:04,080 --> 00:20:06,880
u kolonni ta 'tikek,
li jtajru l-immaġni iskrin,

449
00:20:06,880 --> 00:20:09,240
wara immaġni, wara immaġni, a.k.a.

450
00:20:09,240 --> 00:20:10,650
stampi mozzjoni.

451
00:20:10,650 --> 00:20:12,340
Allura dak li għal inputs u l-outputs.

452
00:20:12,340 --> 00:20:14,420
>> Kollha għandna issa huwa
suppożizzjoni li, inti

453
00:20:14,420 --> 00:20:17,190
taf liema, jekk irridu kompjuter
biex jirrappreżentaw l-informazzjoni,

454
00:20:17,190 --> 00:20:18,560
għandna sistema biex isir dan.

455
00:20:18,560 --> 00:20:20,780
Nistgħu nagħmlu dan bl 0s u
1s fl-aħħar tal-ġurnata.

456
00:20:20,780 --> 00:20:23,160
Iżda nistgħu astratta, hekk
biex jitkellmu, li fuq kollox

457
00:20:23,160 --> 00:20:25,140
sabiex tirrappreżenta aktar
affarijiet interessanti.

458
00:20:25,140 --> 00:20:28,790
U hawn fuq fil CS50, u b'mod
xjenza tal-kompjuter b'mod aktar ġenerali,

459
00:20:28,790 --> 00:20:31,250
aħna issa joqgħod fuq l-ispallejn
tal-persuni kollha li

460
00:20:31,250 --> 00:20:33,530
waslet quddiem minna li dehret li l-.

461
00:20:33,530 --> 00:20:38,170
U issa biss wieħed jassumi li l-kompjuters
jistgħu jirrappreżentaw inputs u l-outputs.

462
00:20:38,170 --> 00:20:41,140
>> Imma issa ejja attwalment
jagħmel xi ħaġa magħhom.

463
00:20:41,140 --> 00:20:44,850
Allura algoriżmu huwa biss sett
ta 'struzzjonijiet, pass pass,

464
00:20:44,850 --> 00:20:46,340
sabiex isolvi xi problema.

465
00:20:46,340 --> 00:20:48,730
U dak li jista 'wieħed problema bħal din tkun.

466
00:20:48,730 --> 00:20:52,440
Allura dan huwa l-iskola antika
teknoloġija, ktieb tat-telefon.

467
00:20:52,440 --> 00:20:55,534
U ġewwa ta 'ktieb tat-telefon huwa
mazz sħiħ ta 'ismijiet u numri.

468
00:20:55,534 --> 00:20:57,700
U dawk l-ismijiet huma ġeneralment
magħżula alfabetikament.

469
00:20:57,700 --> 00:21:01,310
>> Mela jekk jien ridt li ssib xi ħadd fil
dan il-ktieb tat-telefon bħal Mike Smith,

470
00:21:01,310 --> 00:21:02,930
x'hemm bniedem tipiku se jagħmlu?

471
00:21:02,930 --> 00:21:06,000
Ukoll, inti tista 'sempliċement tiftaħ
it up, tħares lejn l-ewwel paġna.

472
00:21:06,000 --> 00:21:07,390
Jiena ma narax Mike Smith.

473
00:21:07,390 --> 00:21:09,740
Dawwar it-tieni paġna,
Jiena ma narax Mike Smith.

474
00:21:09,740 --> 00:21:11,830
U biss iżommu għaddejjin u għaddejjin.

475
00:21:11,830 --> 00:21:14,397
Huwa dan strateġija pass pass korretta?

476
00:21:14,397 --> 00:21:17,380

477
00:21:17,380 --> 00:21:18,310
Yeah.

478
00:21:18,310 --> 00:21:20,080
Huwa tip ta 'stupid, id-dritt.

479
00:21:20,080 --> 00:21:21,646
Huwa ineffiċjenti, id-dritt.

480
00:21:21,646 --> 00:21:24,520
Minħabba li għaddej biex jieħdu dejjem
biex jiksbu l Mike, iżda huwa korrett.

481
00:21:24,520 --> 00:21:26,620
Għaliex jekk Mike huwa hawnhekk
Jien ser tabilħaqq issib lilu.

482
00:21:26,620 --> 00:21:29,030
>> Allura x'hemm ftit aktar
persuna raġjonevoli se jagħmlu?

483
00:21:29,030 --> 00:21:32,180
Huma xorta jistgħu jiftħu lejn il-quddiem,
u forsi jtajru permezz tal-ktieb tat-telefon

484
00:21:32,180 --> 00:21:33,250
żewġ paġni kull darba.

485
00:21:33,250 --> 00:21:34,840
Tnejn, erba ', sitt, tmien.

486
00:21:34,840 --> 00:21:36,830
Ma nistax attwalment
fiżikament jagħmlu dan tajjeb ħafna.

487
00:21:36,830 --> 00:21:39,560
Iżda fit-teorija, dan għandu jkun
darbtejn aktar malajr, żewġ paġni kull darba.

488
00:21:39,560 --> 00:21:41,152
Huwa dan algoritmu korretta?

489
00:21:41,152 --> 00:21:43,252
>> STUDENT: [inaudible]

490
00:21:43,252 --> 00:21:44,460
DAVID Malan: Mhux bilfors.

491
00:21:44,460 --> 00:21:44,960
Tajba.

492
00:21:44,960 --> 00:21:46,112
Għaliex dan twiddiba?

493
00:21:46,112 --> 00:21:50,020
>> STUDENT: Minħabba li hu jista 'jkun fuq waħda
tal-paġni li int taqbeż is-site.

494
00:21:50,020 --> 00:21:50,770
DAVID Malan: Yeah.

495
00:21:50,770 --> 00:21:52,260
Għalhekk anki jekk nasal eqreb u eqreb.

496
00:21:52,260 --> 00:21:56,150
X'jiġri jekk hu biss aċċidentalment, billi ħażin
Xorti, mgħaffeġ bejn iż-żewġ paġni

497
00:21:56,150 --> 00:21:57,290
li jien jtiru fuq?

498
00:21:57,290 --> 00:21:59,920

499
00:21:59,920 --> 00:22:01,730
Għalhekk għandna bżonn jiffissaw għal dan.

500
00:22:01,730 --> 00:22:03,590
Għandna attwalment ħtieġa li
imbagħad ngħidu, stenna minuta,

501
00:22:03,590 --> 00:22:06,240
forsi jekk immorru wisq, forsi
jekk aħna hit-taqsima T,

502
00:22:06,240 --> 00:22:09,670
għall T ġejjin wara Smith, allura għandna
mill-inqas doppju lura paġna mill-inqas wieħed.

503
00:22:09,670 --> 00:22:12,630
Allura fixable, iżda hemm
kwistjoni kondizzjonali hemmhekk.

504
00:22:12,630 --> 00:22:16,159
Allura huwa darbtejn aktar malajr, imma int tista
għandhom għad-doppju lura biss ftit.

505
00:22:16,159 --> 00:22:19,200
Imma l-ebda wieħed fil-kamra tiegħu, anki jekk inti
ma tantx jużaw kotba tat-telefon aktar,

506
00:22:19,200 --> 00:22:20,740
se tibda fil-bidu.

507
00:22:20,740 --> 00:22:23,317
Liema huma inti se tagħmel
infittxu Mike Smith?

508
00:22:23,317 --> 00:22:24,900
Inti se jmorru madwar l-S ta.

509
00:22:24,900 --> 00:22:26,820
Jew jekk inti ma verament ikollhom
il-karta tal iqarrqu fuq il-karta,

510
00:22:26,820 --> 00:22:28,365
int se jmorru mill-inqas
bejn wieħed u ieħor għall-nofs.

511
00:22:28,365 --> 00:22:30,220
U ċertament ma
-quddiem tal-ktieb.

512
00:22:30,220 --> 00:22:31,130
Inti qed tmur biex tfittex l isfel.

513
00:22:31,130 --> 00:22:33,770
U matematikament int probabilment
ser tara t-taqsima M, li

514
00:22:33,770 --> 00:22:34,890
huwa bejn wieħed u ieħor fin-nofs.

515
00:22:34,890 --> 00:22:36,848
U allura int ser
realizzata, dak li huwa veru?

516
00:22:36,848 --> 00:22:37,968
Fejn hi Mike?

517
00:22:37,968 --> 00:22:39,170
>> STUDENT: [inaudible]

518
00:22:39,170 --> 00:22:39,920
DAVID Malan: Yeah.

519
00:22:39,920 --> 00:22:41,530
Hekk hu fuq fuq din in-naħa.

520
00:22:41,530 --> 00:22:42,710
U għalhekk dak li tista 'tagħmel?

521
00:22:42,710 --> 00:22:48,870
Ukoll, kemm figurattivament u litteralment
inti tista 'tiċrita l-problema fil nofs darba?

522
00:22:48,870 --> 00:22:54,260
U allura taf li inti tista tarmi
Din it-taqsima tal-problema bogħod.

523
00:22:54,260 --> 00:22:58,170
U issa aħna qed xellug ma fundamentalment
l-istess problema, imma hija nofs bħala kbar.

524
00:22:58,170 --> 00:22:59,920
U hekk issa x'inhu l-
sett ta 'struzzjonijiet?

525
00:22:59,920 --> 00:23:01,753
X'hemm l-algoritmu
għall-konstatazzjoni Mike Smith?

526
00:23:01,753 --> 00:23:03,030
Huwa l-istess ħaġa eżatt.

527
00:23:03,030 --> 00:23:05,750
>> Issa dan jiġri li jkun il-M
-taqsima u dan huwa t-taqsima Z,

528
00:23:05,750 --> 00:23:08,650
iżda l-fundamentali
Formula għadu l-istess.

529
00:23:08,650 --> 00:23:10,800
Mur madwar in-nofs,
tfittex l isfel, oh, darn dan.

530
00:23:10,800 --> 00:23:13,160
Issa jien fit-taqsima T,
Stajt marret wisq.

531
00:23:13,160 --> 00:23:16,640
Iżda hawnhekk ukoll tista 'inti
japplikaw l-istess loġika.

532
00:23:16,640 --> 00:23:19,189
nofs tarmi mill-problema
bogħod u issa aħna qed

533
00:23:19,189 --> 00:23:21,230
jitħalla bi problema li l-
kwart tad-daqs.

534
00:23:21,230 --> 00:23:28,140
U aħna tista 'tirrepeti, u nistgħu jirrepeti,
u nistgħu rrepeti sakemm teoretikament

535
00:23:28,140 --> 00:23:32,190
hemm waħda biss paġna jitħalla fuq
li Mike jew hi jew mhuwiex.

536
00:23:32,190 --> 00:23:34,014
>> Allura x'hemm tant qawwija dwar din l-idea?

537
00:23:34,014 --> 00:23:35,680
I mean wara kollox, huwa pjuttost intuwittivi.

538
00:23:35,680 --> 00:23:37,390
Ebda wieħed għaddej biex tibda fil-
bidu tal-ktieb tat-telefon

539
00:23:37,390 --> 00:23:39,320
u għatu flip 1,000 paġni li ssib Mike Smith.

540
00:23:39,320 --> 00:23:42,319
Ħafna kulħadd f'din il-kamra huwa għaddej
biex tagħmel bejn wieħed u ieħor dak it-tip ta algoritmu

541
00:23:42,319 --> 00:23:43,220
ħlief għal l-dmugħ.

542
00:23:43,220 --> 00:23:45,480
>> U hekk għaliex ma nagħmlu dan?

543
00:23:45,480 --> 00:23:47,810
Ukoll, jikkunsidraw l-effiċjenza.

544
00:23:47,810 --> 00:23:51,500
Tikkunsidra kemm kemm aħjar dan
algoritmu kien billi jitkissru l-isfel

545
00:23:51,500 --> 00:23:52,890
fil-partijiet komponenti tiegħu.

546
00:23:52,890 --> 00:23:53,980
Allura dak li ma nagħmel ewwel do?

547
00:23:53,980 --> 00:23:55,389
I telgħet il-ktieb tat-telefon.

548
00:23:55,389 --> 00:23:57,180
U xjenzat kompjuter,
u programmer,

549
00:23:57,180 --> 00:24:00,090
b'mod aktar ġenerali jirriżulta, va
li jibdew jingħaddu kollox f'0.

550
00:24:00,090 --> 00:24:00,610
>> Għaliex?

551
00:24:00,610 --> 00:24:03,240
Ukoll, huwa ftit stramba
li aħna bnedmin għadd, ġeneralment,

552
00:24:03,240 --> 00:24:04,400
jibdew minn wieħed.

553
00:24:04,400 --> 00:24:08,110
Minħabba x'inhu l-iżgħar numru
nistgħu jirrappreżentaw bbażata b'mod ċar

554
00:24:08,110 --> 00:24:09,930
anki fuq matematika antika tagħna iskola grad?

555
00:24:09,930 --> 00:24:12,400
Ukoll, kien 0, kemm jekk
huwa fl deċimali jew binarja.

556
00:24:12,400 --> 00:24:14,900
U hekk tkun taf tara fid-dinja
tal-kompjuters u l-ipprogrammar,

557
00:24:14,900 --> 00:24:17,620
speċifikament, nibdew
tgħodd kollox minn 0.

558
00:24:17,620 --> 00:24:19,690
>> So I telgħet-telefon ktieb pass 0.

559
00:24:19,690 --> 00:24:21,924
Jien ser tiftaħ għall-
nofs tal-ktieb tat-telefon.

560
00:24:21,924 --> 00:24:23,840
U li tabilħaqq
espressjoni ta 'dak li għamilt.

561
00:24:23,840 --> 00:24:25,900
U mbagħad it-tieni pass kien ħarsa lejn l-ismijiet.

562
00:24:25,900 --> 00:24:29,110
It-tielet pass huwa ftit
differenti kunċettwalment.

563
00:24:29,110 --> 00:24:30,600
Jien tistaqsi lili nnifsi mistoqsija.

564
00:24:30,600 --> 00:24:33,610
Jekk Smith huwa fost l-ismijiet,
Jien ser jagħmlu deċiżjoni.

565
00:24:33,610 --> 00:24:36,550
Jekk hu fost l-ismijiet,
allura jien ser sejħa Mike.

566
00:24:36,550 --> 00:24:39,590
U jien ser jagħmlu deċiżjoni
ibbażati fuq dik il-biċċa ta 'informazzjoni.

567
00:24:39,590 --> 00:24:44,100
>> Madankollu, jekk le, jekk Smith huwa
aktar kmieni fil-ktieb fuq ix-xellug,

568
00:24:44,100 --> 00:24:48,200
Jien ser tiftaħ għall-nofs
ta 'nofs tax-xellug tal-ktieb.

569
00:24:48,200 --> 00:24:51,674
U allura hawnhekk l-cleverness,
Jien se jmorru lura biex iżidu tnejn.

570
00:24:51,674 --> 00:24:53,590
Jien ser issolvi ta
toqgħod fuq spallejn tiegħi stess

571
00:24:53,590 --> 00:24:55,110
u biss jirrepetu l-ħidma fil-passat I did.

572
00:24:55,110 --> 00:24:58,062
Iżda l-ħidma jien baqa 'huwa
inqas, u inqas, u inqas.

573
00:24:58,062 --> 00:24:59,270
Iżda huwa għadu sejjer jaħdem.

574
00:24:59,270 --> 00:25:02,110
Iżda jekk Mike, minflok, tiġi aktar tard
fil-ktieb fuq il-lemin,

575
00:25:02,110 --> 00:25:04,980
Jien ser tiftaħ għall-nofs
tad-nofs tal-lemin tal-ktieb,

576
00:25:04,980 --> 00:25:07,240
imbagħad mur lura għall-pass tnejn.

577
00:25:07,240 --> 00:25:09,330
>> Iżda hemm attwalment raba xenarju.

578
00:25:09,330 --> 00:25:13,336
s Mike jew hawn,
jew hawn, jew hawn, or--

579
00:25:13,336 --> 00:25:14,152
>> STUDENT: Mhux hemmhekk.

580
00:25:14,152 --> 00:25:15,110
DAVID Malan: Mhux hemmhekk.

581
00:25:15,110 --> 00:25:18,580
U fil-fatt, jekk aħna ma tantiċipa
dan ir-raba 'u finali xenarju

582
00:25:18,580 --> 00:25:21,510
programm tagħna jista 'jkun Buggy
jew difettuż b'xi mod.

583
00:25:21,510 --> 00:25:25,020
Else, nieqaf fil-każ li
aħna ma sabu Mike fil-livelli kollha.

584
00:25:25,020 --> 00:25:27,720
U fil-fatt, jekk inti stajt qatt innotajt
tiegħek jiddendlu kompjuter, jew kollha

585
00:25:27,720 --> 00:25:30,490
ta 'kelma f'daqqa jew xi oħra
programm biss quits għarrieda,

586
00:25:30,490 --> 00:25:32,614
u xi kultant thee żball
messaġġ huwa litteralment dak.

587
00:25:32,614 --> 00:25:34,070
Dan il-programm nieqaf għarrieda.

588
00:25:34,070 --> 00:25:35,570
Dan jista 'jkun għal kull numru ta' raġunijiet.

589
00:25:35,570 --> 00:25:38,120
Imma xi kultant huwa
xi ħaġa sempliċi kemm dan il.

590
00:25:38,120 --> 00:25:40,440
L-programmer bniedem
li kiteb li s-softwer

591
00:25:40,440 --> 00:25:43,610
ma jirrealizzaw li, oh, hemm
raba ħaġa li jista 'jiġri attwalment.

592
00:25:43,610 --> 00:25:46,480
U jekk inti ma jiktbu kodiċi li
qbid li r-raba ix-xenarju,

593
00:25:46,480 --> 00:25:51,342
huwa tabilħaqq mhux mistennija kultant
dak il-kompjuter jista 'attwalment jagħmlu.

594
00:25:51,342 --> 00:25:53,050
Issa ejja sejħa out
ftit ta 'dawn l-affarijiet.

595
00:25:53,050 --> 00:25:55,465
Għalhekk fl-isfar hawn, jien
għandhom termini enfasizzati

596
00:25:55,465 --> 00:25:57,590
li issa aħna qed biss
ser sejħa funzjonijiet.

597
00:25:57,590 --> 00:26:00,700
Funzjonijiet fid-dinja ta '
programmazzjoni huma eżatt bħal azzjonijiet,

598
00:26:00,700 --> 00:26:01,850
dikjarazzjonijiet ta 'azzjonijiet.

599
00:26:01,850 --> 00:26:05,720
Allura aqbad, miftuħa għall-ħarsa
fil, sejħa, miftuħa, miftuħa, nieqaf.

600
00:26:05,720 --> 00:26:09,350
Li l-funzjoni, proċedura,
azzjoni, kwalunkwe numru ta 'sinonimi

601
00:26:09,350 --> 00:26:10,184
jaħdmu kif ukoll.

602
00:26:10,184 --> 00:26:11,850
Issa liema huma dawn l-affarijiet issa bl-isfar?

603
00:26:11,850 --> 00:26:14,210
Jekk inkella, jekk inkella, jekk
inkella, dawn huma dak

604
00:26:14,210 --> 00:26:16,500
aħna qed tmur biex sejħa
kundizzjonijiet fl-ipprogrammar,

605
00:26:16,500 --> 00:26:19,270
jew fergħat, id-deċiżjoni
jirrimarka, jekk inti se.

606
00:26:19,270 --> 00:26:22,759
Imma kif tkun taf liema furketta
fit-triq li tieħu, biex ngħidu hekk?

607
00:26:22,759 --> 00:26:24,550
Għandna bżonn li jenfasizzaw
it-termini għad-dritt

608
00:26:24,550 --> 00:26:27,570
hemm, li huma dawn
iva, l-ebda mistoqsijiet.

609
00:26:27,570 --> 00:26:29,040
Dawn il-mistoqsijiet foloz veru.

610
00:26:29,040 --> 00:26:30,880
Smith fost ismijiet?

611
00:26:30,880 --> 00:26:32,190
Smith kmieni fil-ktieb?

612
00:26:32,190 --> 00:26:33,260
Smith aktar tard fil-ktieb?

613
00:26:33,260 --> 00:26:35,490
Dawn huma mistoqsijiet lill
li hemm iva, jew le,

614
00:26:35,490 --> 00:26:42,110
jew b'mod ekwivalenti vera, jew falza, jew
b'mod ekwivalenti, wieħed jew żero risposta.

615
00:26:42,110 --> 00:26:44,260
>> U sadanittant hemm
waħda biss aħħar biċċa.

616
00:26:44,260 --> 00:26:45,940
Din il hawn għandha x'tip ta 'effett?

617
00:26:45,940 --> 00:26:48,230
Kemm jekk int programm jew le
qabel, kif kieku inti

618
00:26:48,230 --> 00:26:51,030
jiddeskrivu liema pass
sebgħa u 10 qed jagħmlu?

619
00:26:51,030 --> 00:26:54,110

620
00:26:54,110 --> 00:26:55,027
X'għidt?

621
00:26:55,027 --> 00:26:56,110
STUDENT: Pass rikursivi.

622
00:26:56,110 --> 00:26:56,980
DAVID Malan: Pass rikursivi.

623
00:26:56,980 --> 00:26:58,000
Iva, essenzjalment.

624
00:26:58,000 --> 00:27:00,384
Huwa teknikament iterattiv
hawn jekk int familjari.

625
00:27:00,384 --> 00:27:01,550
Iżda aħna ser terga 'lura għal dan.

626
00:27:01,550 --> 00:27:03,930
Iżda huwa qed jagħmel xi ħaġa b'mod ċar.

627
00:27:03,930 --> 00:27:06,370
Għal darb'oħra, huwa jinduċi
ċiklu, linja, id-dritt.

628
00:27:06,370 --> 00:27:08,770
Inti litteralment tmur
lura għal xi pass qabel.

629
00:27:08,770 --> 00:27:12,592
U għalhekk fil-fatt, dan se
timplimenta xi tip ta 'ċiklu.

630
00:27:12,592 --> 00:27:15,050
Imma int mhux qed tmur biex tikseb
staġnati f'dan il endlessly, id-dritt.

631
00:27:15,050 --> 00:27:19,290
Għaliex jekk int dejjem iċċekkjar huwa
Mike hawn, jew lejn ix-xellug, jew mhux hawn,

632
00:27:19,290 --> 00:27:21,360
eventwalment hu mhux ser ikun hemm.

633
00:27:21,360 --> 00:27:24,590
U inti tista 'biss nieqaf għal kollox
kif kull li aħħar linja.

634
00:27:24,590 --> 00:27:25,834
>> Allura dak li għal vokabularju.

635
00:27:25,834 --> 00:27:28,250
U dan kien dak li nixtiequ
ġeneralment sejħa kodiċi pseudocode.

636
00:27:28,250 --> 00:27:29,570
Mhuwiex lingwa attwali.

637
00:27:29,570 --> 00:27:32,405
Huwa biss konċiż ħafna Ingliż,
iżda hija tikkomunika l-punt.

638
00:27:32,405 --> 00:27:33,780
M'hemm l-ebda struttura formali hawn.

639
00:27:33,780 --> 00:27:35,738
Inti biss użu huwa ftit
kliem, iżda kliem kif ċari

640
00:27:35,738 --> 00:27:37,870
kemm tista 'biex tikkomunika l-idea tiegħek.

641
00:27:37,870 --> 00:27:40,580
>> Issa kif tajba hija din l-algorithm
u kemm ikun aħjar huwa?

642
00:27:40,580 --> 00:27:43,570
Ukoll, aħna ma jkollhomx biex tikseb fis-
ispeċifiċitajiet ta 'numri jew xejn

643
00:27:43,570 --> 00:27:44,069
bħal dik.

644
00:27:44,069 --> 00:27:46,300
Iżda nistgħu nħarsu lejn l-
forma ta 'din is-soluzzjoni.

645
00:27:46,300 --> 00:27:50,194
Allura jekk aħna biss jiġbed xi plott xy
hawn fuq l-assi orizzontali hawn.

646
00:27:50,194 --> 00:27:51,860
Ejja biss sejħa-daqs tal-problema.

647
00:27:51,860 --> 00:27:55,540
U xjenzat kompjuter kieku
tipikament jużaw n bħala l-varjabbli hawn.

648
00:27:55,540 --> 00:27:59,690
Allura n paġni, jew n-nies fil-kamra, jew
kwalunkwe huwa inti qed tipprova biex jingħaddu.

649
00:27:59,690 --> 00:28:03,039
>> U mbagħad fuq l-assi vertikali fuq il-
xellug, li jkun il-ħin biex issolvi.

650
00:28:03,039 --> 00:28:05,330
Allura kif ħafna sekondi tagħmlu
jieħdu me biex isibu Mike Smith?

651
00:28:05,330 --> 00:28:06,621
Jew kif ħafna passi ma tieħu?

652
00:28:06,621 --> 00:28:08,100
Kemm dawriet paġna ħafna ma jieħdu?

653
00:28:08,100 --> 00:28:11,370
Allura dak kemm l-ispejjeż
lili fil-ħin biex issolvi problema.

654
00:28:11,370 --> 00:28:15,030
U nistgħu jiġbed l-ewwel
algoritmi inklinazzjoni, jekk inti se,

655
00:28:15,030 --> 00:28:16,910
kif biss din il-linja dritta bl-aħmar.

656
00:28:16,910 --> 00:28:18,450
U jien ser sejħa hija n.

657
00:28:18,450 --> 00:28:19,117
>> Għaliex n?

658
00:28:19,117 --> 00:28:20,950
Għaliex huwa biss dan wieħed
relazzjoni waħda?

659
00:28:20,950 --> 00:28:22,700
Ukoll, jekk Verizon jew
tkun xi tkun il-kumpanija tat-telefon

660
00:28:22,700 --> 00:28:25,130
iżid paġna waħda aktar biex
-ktieb tat-telefon sena d-dieħla,

661
00:28:25,130 --> 00:28:28,370
li jistgħu jimbuttaw wieħed Mike
aktar pass eqreb lejn l-għan,

662
00:28:28,370 --> 00:28:29,950
jiddependi fuq fejn dik il-paġna hu.

663
00:28:29,950 --> 00:28:32,380
U għalhekk l-effett jista 'biss
jkun li jżidu sekonda waħda aktar.

664
00:28:32,380 --> 00:28:33,520
Jew waħda aktar paġna dawran.

665
00:28:33,520 --> 00:28:34,970
A waħda għall-proporzjon wieħed.

666
00:28:34,970 --> 00:28:37,410
>> B'kuntrast, it-tieni algoritmu.

667
00:28:37,410 --> 00:28:41,406
Kemm aktar mgħaġġla kienet li intuwittivament?

668
00:28:41,406 --> 00:28:42,780
Fejn I marru żewġ paġni kull darba?

669
00:28:42,780 --> 00:28:43,664
Yeah.

670
00:28:43,664 --> 00:28:44,497
>> STUDENT: [inaudible]

671
00:28:44,497 --> 00:28:47,255

672
00:28:47,255 --> 00:28:48,080
>> DAVID Malan: Yeah.

673
00:28:48,080 --> 00:28:49,220
Allura li għaddej biex tkun darbtejn aktar malajr.

674
00:28:49,220 --> 00:28:51,344
U aħna se tiġbed l hawn
jiddependi fuq l-iskala.

675
00:28:51,344 --> 00:28:54,220
Xorta hija linja dritta,
iżda anqas mill-linja ħamra.

676
00:28:54,220 --> 00:28:56,410
Għaliex għal xi numru
ta 'paġni, jekk tieħu

677
00:28:56,410 --> 00:28:58,360
inti dan passi ħafna ma '
l-ewwel algoritmu,

678
00:28:58,360 --> 00:29:00,570
li għaddej biex tieħu inti nofs
bħala passi ħafna bit-tieni.

679
00:29:00,570 --> 00:29:02,770
U għalhekk il-linja isfar
jiddeskrivi t-tieni algoritmu

680
00:29:02,770 --> 00:29:03,990
huwa biss se tkun taħtha.

681
00:29:03,990 --> 00:29:07,250
>> Imma x'hemm verament b'saħħtu huwa li
jaħsbu dwar it-tielet u finali,

682
00:29:07,250 --> 00:29:10,480
u amazingly aktar intuwittivi
algoritmu, li għandha dan forma.

683
00:29:10,480 --> 00:29:12,720
Teknikament aħna kieku ssejjaħ
din il-kurva logaritmika.

684
00:29:12,720 --> 00:29:14,309
Log bażi 2 ta n f'dan il-każ.

685
00:29:14,309 --> 00:29:15,600
Iżda dan ma verament kwistjoni.

686
00:29:15,600 --> 00:29:19,140
Li huwa importanti hija verament l fundamentalment
għamla differenti li hija għandha.

687
00:29:19,140 --> 00:29:22,810
U inti tista 'tikkunsidra kemm
ħafna iqsar din il-linja verament

688
00:29:22,810 --> 00:29:24,620
huwa fil-medda t-twila.

689
00:29:24,620 --> 00:29:25,870
Huwa dejjem jiżdied.

690
00:29:25,870 --> 00:29:27,620
Ma flatten out perfettament.

691
00:29:27,620 --> 00:29:34,030
Iżda tikber dejjem hekk ħafna aktar bil-mod
bħala l-problema gets akbar u akbar.

692
00:29:34,030 --> 00:29:36,710
U inti tista 'taħseb li dan il-
way-- jekk Verizon ma biss

693
00:29:36,710 --> 00:29:40,410
żid paġna sena d-dieħla, imma jirdoppja
l-għadd ta 'paġni fil-ktieb tat-telefon,

694
00:29:40,410 --> 00:29:42,740
l-ewwel algoritmu jista
tieħu d-doppju passi.

695
00:29:42,740 --> 00:29:45,360
Jekk huwa 1,000 paġni dan
sena, 2,000 paġni sena d-dieħla,

696
00:29:45,360 --> 00:29:47,180
Mike jista 'jkun li ħafna aktar' l bogħod.

697
00:29:47,180 --> 00:29:49,380
Allura huwa 1,000 passi addizzjonali biex isibu lilu.

698
00:29:49,380 --> 00:29:51,610
It-tieni algoritmu
jista 'jkun biss 500 iktar

699
00:29:51,610 --> 00:29:55,490
passi biex issib lilu minħabba darb'oħra,
Jien jtajru permezz ta 'dan tnejn fi żmien.

700
00:29:55,490 --> 00:29:56,950
>> Imma xi ngħidu dwar it-tielet algoritmu?

701
00:29:56,950 --> 00:29:59,010
Jekk Verizon jirdoppja l
daqs tal-ktieb tat-telefon

702
00:29:59,010 --> 00:30:02,620
sena d-dieħla mill-1000 sal-2000
paġni, kemm-passi aktar

703
00:30:02,620 --> 00:30:05,540
huwa tielet algoritmu tiegħi se jieħu?

704
00:30:05,540 --> 00:30:06,630
Yeah, huwa biss wieħed.

705
00:30:06,630 --> 00:30:08,600
U li l-idea qawwija.

706
00:30:08,600 --> 00:30:12,780
Tista 'tieħu 1,000 paġna gidma
barra minn dik il-problema f'daqqa.

707
00:30:12,780 --> 00:30:14,510
U issa jekk inti tqis
xenarju iblah,

708
00:30:14,510 --> 00:30:17,320
iżda tip ta 'jitkellem għall-
qawwa ta 'dan it-tip ta intuition--

709
00:30:17,320 --> 00:30:21,494
jekk ktieb tat-telefon kellhom, bħall-erba 'biljun
paġni, iħoss bħal problema verament kbir.

710
00:30:21,494 --> 00:30:23,410
U fil-fatt, dan jista 'jkun
jieħdu me erba 'biljun paġna

711
00:30:23,410 --> 00:30:26,549
dawriet li ssib Mike Smith f'dak
każ bl-ewwel algoritmu.

712
00:30:26,549 --> 00:30:28,840
Imma kif ħafna passi ikun jidher
jieħdu fit-tielet algoritmu

713
00:30:28,840 --> 00:30:31,585
biex isibu Mike fost erba
biljun biċċiet tal-karti?

714
00:30:31,585 --> 00:30:34,865

715
00:30:34,865 --> 00:30:36,240
Allura erba 'biljun inti tiċrita fil nofs.

716
00:30:36,240 --> 00:30:37,220
Ikollok żewġ biljun.

717
00:30:37,220 --> 00:30:42,810
Imbagħad biljun, imbagħad 500 miljun,
250 miljun, 125 million-- iżda

718
00:30:42,810 --> 00:30:44,780
iħoss bħal dan huwa
ser jieħu waqt.

719
00:30:44,780 --> 00:30:47,340
I jista 'jkollhom bżonn 32-swaba
biex jingħaddu up li għoli.

720
00:30:47,340 --> 00:30:51,340
Iżda huwa tassew bħala
ftit bħala 32 tiċrit paġna.

721
00:30:51,340 --> 00:30:54,060
Inti tista 'tmur minn erba
biljun għall-paġna ta 'diviżjoni waħda

722
00:30:54,060 --> 00:30:57,030
in-numru oriġinali ta '
paġni fil nofs 32 darbiet

723
00:30:57,030 --> 00:30:59,290
sakemm int xellug ma
biss dik il-paġna waħda.

724
00:30:59,290 --> 00:31:01,320
>> Issa, naturalment, jien qerq hawn.

725
00:31:01,320 --> 00:31:06,470
Mhuwiex li aħna biss qed sort
tal stupid kollox ma 'l-ewwel tnejn

726
00:31:06,470 --> 00:31:07,470
algoritmi.

727
00:31:07,470 --> 00:31:11,500
I am qerq f'ċertu sens, jew
verament Jien lieva suppożizzjoni.

728
00:31:11,500 --> 00:31:15,610
Dak li kien veru dwar il-ktieb tat-telefon
fil-forma oriġinali tiegħu li ppermettew

729
00:31:15,610 --> 00:31:17,450
me li anki tuża dan it-tielet algoritmu?

730
00:31:17,450 --> 00:31:18,110
Yeah?

731
00:31:18,110 --> 00:31:19,360
UDJENZA: Kien alphabetized.

732
00:31:19,360 --> 00:31:21,130
DAVID Malan: Kien alphabetized, id-dritt?

733
00:31:21,130 --> 00:31:23,500
Kieku kien biss fl-addoċċ
ordni, dan huwa ħela

734
00:31:23,500 --> 00:31:24,880
ta 'żmien, dan il-konverżazzjoni kollu.

735
00:31:24,880 --> 00:31:27,500
Għandi biex tħares lejn kull
paġna jekk huwa sabiex każwali

736
00:31:27,500 --> 00:31:30,350
biex isibu Mike Smith qabel I
jista 'jikkonkludi hu hemmhekk jew le.

737
00:31:30,350 --> 00:31:32,880
U għalhekk l-kantuniera aħna
naqqsu hija li jien

738
00:31:32,880 --> 00:31:35,752
jassumi li xi ħadd ieħor fil
F'dan il-każ għamlu x-xogħol għalija.

739
00:31:35,752 --> 00:31:38,460
U sabiex finalment jistieden
il-kwistjoni, ukoll, stenna minuta.

740
00:31:38,460 --> 00:31:41,284
Kif inti sort 1000
paġni ta 'ismijiet u n-numri?

741
00:31:41,284 --> 00:31:43,200
Li l-fatt differenti
problema, xi ħaġa

742
00:31:43,200 --> 00:31:44,574
aħna ser terga 'lura għal fil-futur.

743
00:31:44,574 --> 00:31:48,130
Imma meta taħseb dwar websajts
bħall Facebook u Google għal Gmail

744
00:31:48,130 --> 00:31:50,450
u affarijiet simili Google
indiċi tfittxija stess,

745
00:31:50,450 --> 00:31:53,800
meta jkollok miljuni jew biljuni ta '
biċċiet ta 'data maħżuna dawn il-ġranet,

746
00:31:53,800 --> 00:31:56,660
searching-- u biex ma nsemmux
issortjar dawk problems--

747
00:31:56,660 --> 00:31:59,450
huwa finalment sfida fiha nnifisha.

748
00:31:59,450 --> 00:32:02,250
U fil-fatt, dan imbagħad huwa
biss wieħed minn dawk l-isfidi

749
00:32:02,250 --> 00:32:03,460
li aħna ser tkun tħares lejn.

750
00:32:03,460 --> 00:32:05,590
>> Allura issa ejja tieħu mument
u tagħti ħarsa lejn CS50

751
00:32:05,590 --> 00:32:09,082
innifsu u jagħtuk sens ta '
x'hemm fil-maħżen dan is-semestru.

752
00:32:09,082 --> 00:32:11,540
Tabilħaqq, jekk inti ma jkunux diġà,
do tagħti ħarsa lejn dan il-URL.

753
00:32:11,540 --> 00:32:13,880
U kif Patrick alluda
għal din is-sena aħna qed

754
00:32:13,880 --> 00:32:17,130
jagħmlu investiment sinifikanti kollha
aktar in sostenn tal-kors tal-

755
00:32:17,130 --> 00:32:20,170
struttura f 'termini ta' l-TAs
u l-CAs, ħinijiet,

756
00:32:20,170 --> 00:32:23,520
disponibbiltà sezzjonijiet, u
materjali diġitali onlajn, kif ukoll.

757
00:32:23,520 --> 00:32:27,489
Tabilħaqq, fir-rigward ta 'l-tal-kors
lecture, aħna qed hawn illum.

758
00:32:27,489 --> 00:32:29,780
U l-aspettattivi dan il
sena uffiċjalment tal-kors

759
00:32:29,780 --> 00:32:32,370
huma jattendu għall llum, il-kors tal-
aħħar lecture, u kors

760
00:32:32,370 --> 00:32:35,161
bejn wieħed u ieħor fin-nofs tas-semestru
ma 'kull lecture bejniethom

761
00:32:35,161 --> 00:32:37,280
magħmula disponibbli b'mod ġenerali
nhar ta 'Ġimgħa wara nofsinhar

762
00:32:37,280 --> 00:32:40,240
fuq l-internet, kemm għall-istudenti Yale
u studenti Harvard din is-sena.

763
00:32:40,240 --> 00:32:42,090
Tabilħaqq, wieħed mill-
bidliet fundamentali huwa

764
00:32:42,090 --> 00:32:44,310
li aħna qed tadotta fi
Harvard paradigma ħafna

765
00:32:44,310 --> 00:32:46,570
bħal għamilna hawn aħħar
sena u issa din is-sena,

766
00:32:46,570 --> 00:32:50,300
sabiex b'mod simili, aħna xorta film aktar
tal-kors ta 'lectures fl-Cambridge

767
00:32:50,300 --> 00:32:52,900
iżda jagħmilhom disponibbli aktar kmieni
milli għandna fil-passat

768
00:32:52,900 --> 00:32:55,540
sabiex dawk tal you-- jekk inti
jixtieq, per eżempju,

769
00:32:55,540 --> 00:32:58,400
jiksbu bidu ras fuq materjali
dwar il--ewwel weekend pjuttost

770
00:32:58,400 --> 00:33:02,000
mit-tieni weekend, inti ser ikollok
aċċess għal dawn it-tipi ta 'materjali,

771
00:33:02,000 --> 00:33:06,561
jitfittex, embeddable, hyperlinkable
għar-riżorsi relatati l-kollha qabel.

772
00:33:06,561 --> 00:33:09,560
F'termini tas-suġġetti, li jtik
sens ta 'trajectory---kors tal

773
00:33:09,560 --> 00:33:12,365
u xi wħud dan jista 'jkun lingwaġġ għall
issa, iżda mhux għal żmien twil, mistrieħ assigurat.

774
00:33:12,365 --> 00:33:15,010
Aħna ser tibda llum, finalment,
ma tħares lejn programmazzjoni wieħed

775
00:33:15,010 --> 00:33:16,260
lingwa imsejħa scratch.

776
00:33:16,260 --> 00:33:19,380
Aħna ser tranżizzjoni wara
ġimgħa d-dieħla għal xi ħaġa imsejħa C

777
00:33:19,380 --> 00:33:22,140
u mbagħad tħares lejn bini ieħor
blokki biex isolvu problemi,

778
00:33:22,140 --> 00:33:26,230
affarijiet imsejħa arrays u algoritmi,
kif nużaw memorja għall-vantaġġ tagħna

779
00:33:26,230 --> 00:33:28,326
u l-iżvantaġġ, u
affarijiet simili strutturi tad-dejta,

780
00:33:28,326 --> 00:33:31,200
u mbagħad lejn it-tmiem denb tal-
klassi tħares lejn it-tagħlim magna

781
00:33:31,200 --> 00:33:33,410
u tħares lejn ieħor
lingwa imsejħa Python,

782
00:33:33,410 --> 00:33:37,460
kif il-web jaħdem, kif l-Internet aktar
ġeneralment taħdem, protokolli bħall HTTP,

783
00:33:37,460 --> 00:33:40,950
-lingwi għall-databases simili
SQL, JavaScript għall-web,

784
00:33:40,950 --> 00:33:43,000
u finalment irbit
kollha flimkien.

785
00:33:43,000 --> 00:33:44,708
>> U għalhekk fil-fatt, fil-
tmiem tal-jum, inti

786
00:33:44,708 --> 00:33:50,250
mhux se jitgħallmu f'din il Scratch-klassi
jew C jew Python jew SQL jew JavaScript.

787
00:33:50,250 --> 00:33:53,560
Inti se minflok b'mod aktar ġenerali jitgħallmu
xjenza tal-kompjuter u l-pedamenti

788
00:33:53,560 --> 00:33:55,790
tiegħu, u int se
jitgħallmu kif program

789
00:33:55,790 --> 00:33:58,800
fi kwalunkwe numru ta 'dawn
lingwi tul it-triq.

790
00:33:58,800 --> 00:34:00,970
Allura fil-fatt, wieħed mill-għanijiet
tal-kors fl-aħħar

791
00:34:00,970 --> 00:34:04,160
huwa li jieħdu off kollha tal-proċeduri ta 'kors
roti ta 'taħriġ billi dawk il-ġimgħat finali

792
00:34:04,160 --> 00:34:06,710
sabiex wara dan, inti tista '
ritorn għall fields-- tiegħek stess

793
00:34:06,710 --> 00:34:08,510
jekk dan huwiex jew
mhux xjenza tal-kompjuter

794
00:34:08,510 --> 00:34:12,290
jew l-inġinerija, fil-naturali
xjenzi, arti, umanistiċi, jew beyond--

795
00:34:12,290 --> 00:34:14,720
u jġibu xi ftit minn dan
ideat kors u l-s f'dan il-qasam

796
00:34:14,720 --> 00:34:17,400
ideat u prattiċi
ħiliet għall-dominju tiegħek stess

797
00:34:17,400 --> 00:34:19,480
sabiex isolvu problemi hemmhekk.

798
00:34:19,480 --> 00:34:22,990
>> Dak li aħna ser tkun qiegħda tagħmel hawn sadanittant
f'ħafna Ħamis wara illum

799
00:34:22,990 --> 00:34:26,160
huwa bl-irjus tal-kors li jwasslu
dak li aħna ser sejħa walkthroughs

800
00:34:26,160 --> 00:34:27,620
ta 'settijiet problema tal-kors tal.

801
00:34:27,620 --> 00:34:29,610
Allura kull ġimgħa meta aħna
għandhom problema stabbiliti, aħna ser

802
00:34:29,610 --> 00:34:32,900
tkun mixi permezz f'post
bħal dan isfidi tal-kors, il-

803
00:34:32,900 --> 00:34:35,582
joffrilkom xi tips u
tricks u tekniki tad-disinn.

804
00:34:35,582 --> 00:34:37,540
Imma jekk int ma kapaċi
biex jagħmlu dawk fil-persuna,

805
00:34:37,540 --> 00:34:39,760
tirrealizza dawk istess
ir-riżorsi se tkun inkorporata

806
00:34:39,760 --> 00:34:41,590
minn wieħed mill-l-kors
assistenti tagħlim

807
00:34:41,590 --> 00:34:43,860
fil-problema settijiet infushom, kif ukoll.

808
00:34:43,860 --> 00:34:47,124
>> Il-problema settijiet din is-sena, b'differenza
sena li għaddiet, ibbażati fuq ir-rispons,

809
00:34:47,124 --> 00:34:48,540
xorta se jiġu rilaxxati nhar ta 'Ġimgħa.

810
00:34:48,540 --> 00:34:51,310
Imma aktar milli dovut
-Ġimgħa sussegwenti,

811
00:34:51,310 --> 00:34:55,079
biex b'hekk jagħtik biss sebat ijiem,
effettivament se jkun dovut 10 ijiem wara.

812
00:34:55,079 --> 00:34:57,620
U fil-fatt, dan se jfisser li
dawn ser jikkoinċidu minn weekend.

813
00:34:57,620 --> 00:34:59,369
Iżda nisperaw din is-sena
speċjalment dan se

814
00:34:59,369 --> 00:35:02,320
jippermetti lill-istudenti biex jakkomodaw aħjar
ebb u l-fluss fl-iskedi tagħhom,

815
00:35:02,320 --> 00:35:05,040
jekk huwa akkademiċi jew
extracurriculars jew atletika

816
00:35:05,040 --> 00:35:06,280
jew staġun nofs it-terminu.

817
00:35:06,280 --> 00:35:10,060
Inti tista 'jew antiċipati jew back-tagħbija
ġimgħa tiegħek jiffoka fuq CS50 bbażati

818
00:35:10,060 --> 00:35:12,400
fuq it-tagħbija attwali kors ġimgħa tiegħek stess.

819
00:35:12,400 --> 00:35:14,990
>> Il-problema settijiet infushom
se jkopru firxa ta 'lingwi,

820
00:35:14,990 --> 00:35:17,990
għalkemm aħna ser niffukaw
predominantement minn kmieni dwar C

821
00:35:17,990 --> 00:35:23,040
qabel aħna niffukaw wara dan, fuq għolja
livell, aktar lingwi fuq l-internet iċċentrati.

822
00:35:23,040 --> 00:35:25,970
U mbagħad ftit ta 'here-- FAQs
għandek tieħu klassi bħal CS50

823
00:35:25,970 --> 00:35:26,900
bħala l-ewwel sena?

824
00:35:26,900 --> 00:35:27,970
Allura assolutament.

825
00:35:27,970 --> 00:35:30,470
U fil-fatt, mhuwiex
neċessarjament xi ħaġa

826
00:35:30,470 --> 00:35:34,440
inti għandek tipposponi sakemm inti ħadthom cut
snienek fuq tipi oħra ta 'klassijiet.

827
00:35:34,440 --> 00:35:36,290
Iżda, jqisu
li għal ħafna studenti,

828
00:35:36,290 --> 00:35:39,040
myself inklużi lura fil-ġurnata,
dan huwa qasam familjari ħafna,

829
00:35:39,040 --> 00:35:40,997
speċjalment jekk inti
qatt ma jieħdu CSA AP

830
00:35:40,997 --> 00:35:42,580
jew xi ħaġa bħal dik fl-iskola għolja.

831
00:35:42,580 --> 00:35:44,705
Iżda jirrealizzaw li kmieni,
jekk huwa dan il-kors

832
00:35:44,705 --> 00:35:47,900
jew xi kors introduttorju oħra,
issa huwa tabilħaqq l-aħjar ħin,

833
00:35:47,900 --> 00:35:52,082
Naħseb, li ssib xi triq ġdida jew
xi interess akkademiku ġdid, kif ukoll.

834
00:35:52,082 --> 00:35:55,040
U mbagħad tieħu ma 'courses-- oħra
sabiex wieħed mid-differenzi ewlenin hawnhekk

835
00:35:55,040 --> 00:35:57,906
kontra Harvard hija li aħna biss
jieħdu erba 'korsijiet għal kull semestru

836
00:35:57,906 --> 00:35:59,030
fil-Harvard għal xi raġuni.

837
00:35:59,030 --> 00:36:01,494
U inti guys attwalment pull
off xi 36 korsijiet b'kollox

838
00:36:01,494 --> 00:36:04,410
matul il-kors ta 'erba' snin tiegħek,
li jfisser ġeneralment erba 'jew ħames

839
00:36:04,410 --> 00:36:05,040
klassijiet.

840
00:36:05,040 --> 00:36:08,367
U jien naħseb huwa pjuttost ġust li wieħed jgħid
u jiċħadx CS50, permezz tad-disinn, hija

841
00:36:08,367 --> 00:36:10,700
probabbilment mhux it-tip ta 'klassi
li għandek tipikament

842
00:36:10,700 --> 00:36:13,680
tieħu erbgħa l-oħra
korsijiet għal total ta 'ħames

843
00:36:13,680 --> 00:36:16,249
għaliex psets huma bil
disinn pjuttost intensivi.

844
00:36:16,249 --> 00:36:18,040
Tabilħaqq, I wisq tgħallimt
din il lura fil-ġurnata.

845
00:36:18,040 --> 00:36:21,110
Jien ma jiddeskrivi CS50 u
xjenza tal-kompjuter, l-ipprogrammar

846
00:36:21,110 --> 00:36:24,477
kif daqstant hard kif
huwa biss l-ħin.

847
00:36:24,477 --> 00:36:26,560
Mhuwiex-tip ta 'ħaġa
fejn wara l-pranzu, inti

848
00:36:26,560 --> 00:36:28,310
tista 'tmur lura għall-dorm tiegħek
kamra, bilqegħda, u tibda

849
00:36:28,310 --> 00:36:29,710
jiffoka fuq il pset
ħsieb, id-dritt,

850
00:36:29,710 --> 00:36:31,340
Jien gonna bang dan out
tonight u mbagħad jimxu

851
00:36:31,340 --> 00:36:33,000
dwar is-suġġett li jmiss tiegħi l-għada.

852
00:36:33,000 --> 00:36:34,450
Kultant inti biss hit ħajt.

853
00:36:34,450 --> 00:36:35,690
Inti għandek bugs fil-kodiċi tiegħek.

854
00:36:35,690 --> 00:36:37,900
Inti ma neċessarjament jaf
kif se ssolvi xi problema.

855
00:36:37,900 --> 00:36:41,670
U waħda mill-karatteristiċi ewlenin ta '
programmazzjoni għalija nnifsi din il-ġurnata

856
00:36:41,670 --> 00:36:44,480
huwa inti biss tip ta 'bżonn tieħu
pass lura kultant, irqad fuqha

857
00:36:44,480 --> 00:36:47,870
jew taħseb dwar dan matul il-kors
ta jog jew xi attività oħra,

858
00:36:47,870 --> 00:36:49,240
u mbagħad terga 'lura għal frisk.

859
00:36:49,240 --> 00:36:50,930
U inti biss bżonn dawn it-twieqi ta 'żmien.

860
00:36:50,930 --> 00:36:52,910
>> U fil-fatt, hu għalhekk li konna
tawwal l-ammont ta 'ħin

861
00:36:52,910 --> 00:36:55,710
disponibbli għall-settijiet problema
din is-sena u wkoll, per dik URL

862
00:36:55,710 --> 00:36:57,950
I impoġġija qabel fir-rigward
x'hemm ġdid dan is-semestru,

863
00:36:57,950 --> 00:37:00,950
mirqum il-problema settijiet b'tali mod li
dawn qed fundamentalment mhux inqas rigorużi,

864
00:37:00,950 --> 00:37:03,741
u l-takeaways mhumiex inqas, iżda
hemm ħafna kwistjoni inqas ta 'quddiem,

865
00:37:03,741 --> 00:37:07,630
ħafna inqas legwork li għandek bżonn biex
do fuq quddiem ta 'kull sett problema,

866
00:37:07,630 --> 00:37:10,680
kif tkun taf tara, qabel ma inti tista '
attwalment adsa fil-laħam ta 'dan.

867
00:37:10,680 --> 00:37:13,500
Allura jirrealizzaw li dawk u oħrajn
bidliet huma fuq l-orizzont

868
00:37:13,500 --> 00:37:16,490
biex jakkomodaw aħjar studenti,
iżda fl-aħħar biex tiżgura

869
00:37:16,490 --> 00:37:18,860
li l takeaways huma
tabilħaqq aktar għoli possibli.

870
00:37:18,860 --> 00:37:21,330
Għalhekk, filwaqt li x-xogħol aktar milli
jista 'jkun fi klassi tipika,

871
00:37:21,330 --> 00:37:25,120
aħna nittamaw li l-prospetti għall-
inti u l-takeaways għalik

872
00:37:25,120 --> 00:37:27,490
u l-ħiliet u l-ideat
li magħhom inti ħruġ

873
00:37:27,490 --> 00:37:29,921
huma l-aktar konvinċenti bħala riżultat.

874
00:37:29,921 --> 00:37:32,420
U biex inti tikseb there-- u dan
hija waħda mill-takeaways ewlenin,

875
00:37:32,420 --> 00:37:35,470
kif Patrick alluda earlier-- huwa
istruttura ta 'appoġġ tal-kors tal.

876
00:37:35,470 --> 00:37:39,720
Allura mhux biss ma CS50 jkollhom waħda mill
l-istaff kors akbar fuq il-kampus.

877
00:37:39,720 --> 00:37:41,750
Hija wkoll għandha waħda mill-
aktar undergraduate.

878
00:37:41,750 --> 00:37:43,700
Tabilħaqq, is-sena CS50
kienet l-ewwel klassi

879
00:37:43,700 --> 00:37:45,366
li jkollhom għalliema undergraduate.

880
00:37:45,366 --> 00:37:48,570
U xhieda ta 'dan is-suċċess tagħmel issa
korsijiet oħra ħafna fil-Yale KEFA

881
00:37:48,570 --> 00:37:49,500
jkollu dik, kif ukoll.

882
00:37:49,500 --> 00:37:52,906
U għall-istudenti, b'mod speċifiku,
se dawn TAs u l-assistenti kors

883
00:37:52,906 --> 00:37:55,030
tkun ta 'sostenn kollu kemm hu
netwerk ta 'riżorsi ta' appoġġ,

884
00:37:55,030 --> 00:37:58,250
Fost dawn is-sezzjonijiet jew
recitations, l-opportunitajiet ta 'kull ġimgħa

885
00:37:58,250 --> 00:38:01,674
li jkollha diskussjonijiet aktar intimi
u reviżjonijiet ta 'materjal fil-mira

886
00:38:01,674 --> 00:38:04,590
għall binarji differenti, għall-istudenti
inqas komdi, aktar komda,

887
00:38:04,590 --> 00:38:05,720
jew x'imkien bejniethom.

888
00:38:05,720 --> 00:38:08,886
Dawn se ssegwi d-disponibbiltà ta '
il lectures minn diversi jiem kull ġimgħa

889
00:38:08,886 --> 00:38:09,970
nhar ta 'Tnejn u t-Tlieta.

890
00:38:09,970 --> 00:38:11,970
U mbagħad hours-- uffiċċju
one-on-waħda opportunitajiet

891
00:38:11,970 --> 00:38:15,490
għall-għajnuna mill-CAs kors u TAs
se jkun nhar ta 'Erbgħa u l-Ħamis

892
00:38:15,490 --> 00:38:18,400
u Ħdud fuq multipli
drabi, li kollha

893
00:38:18,400 --> 00:38:22,180
se jitpoġġew fuq il-websajt tal-kors, il-
saħansitra aktar minn sena li għaddiet, kif ukoll.

894
00:38:22,180 --> 00:38:25,501
>> Imma x'hemm muftieħ għas CS50, jekk
mhux Ċertament daqsxejn mhux tas-soltu,

895
00:38:25,501 --> 00:38:27,750
huwa kultura tal-kors li
konna ppruvaw li tkun ikkultivata,

896
00:38:27,750 --> 00:38:30,672
kemm fil Cambridge għal ħafna snin
u issa aktar riċenti fi New Haven.

897
00:38:30,672 --> 00:38:33,130
U fil-fatt, li ġejjin up dan
Sibt, jekk int ma semgħu,

898
00:38:33,130 --> 00:38:36,410
huwa Jum CS50 Puzzle, li għandu
xejn x'jaqsmu ma 'xjenza tal-kompjuter

899
00:38:36,410 --> 00:38:39,430
iżda hija kompletament iddisinjati biex jibgħat
messaġġ li x-xjenza tal-kompjuter hija

900
00:38:39,430 --> 00:38:40,665
dwar soluzzjoni ta 'problemi.

901
00:38:40,665 --> 00:38:43,540
U fil-fatt, jekk inti tixtieq li msieħba
ma 'wieħed jew tnejn jew tlieta ħbieb

902
00:38:43,540 --> 00:38:46,150
u jiffurmaw tim għal CS50
Puzzle Jum, tagħti ħarsa

903
00:38:46,150 --> 00:38:48,010
lejn l-reklami li huma fuq il-mod.

904
00:38:48,010 --> 00:38:51,582
U tliet sigħat ta 'pizza u
puzzles u premjijiet jistennew.

905
00:38:51,582 --> 00:38:53,290
U fil-fatt, għall-
ewwel darba din is-sena,

906
00:38:53,290 --> 00:38:54,873
mhux se jkun responsabbli konġuntament ma 'Harvard.

907
00:38:54,873 --> 00:38:57,530
Se jkun hawn indipendentement fil-Yale.

908
00:38:57,530 --> 00:38:59,815
Allura żżomm għajnejk out għal
dawk jekk inti ma.

909
00:38:59,815 --> 00:39:02,440
Ħafna kull Ġimgħa fl-semestru
do aħna nippruvaw nagħmlu klassi kbira

910
00:39:02,440 --> 00:39:06,710
jħossu żgħar u tressaq xi 50 studenti
biex lunch mal-persunal tal-kors, il-

911
00:39:06,710 --> 00:39:08,730
mal-alunni, ħbieb
mill-industrija biex jitkellmu

912
00:39:08,730 --> 00:39:12,630
dwar dak il-ħajja huwa simili wara
klassi bħall CS50 u matul is-sjuf

913
00:39:12,630 --> 00:39:14,250
u wara l-gradwazzjoni.

914
00:39:14,250 --> 00:39:16,280
Allura żżomm għajnejk out għal
stediniet għal dak.

915
00:39:16,280 --> 00:39:17,988
Għal-ewwel darba
Qatt din is-sena se aħna

916
00:39:17,988 --> 00:39:21,420
żomm l-ewwel kodifikazzjoni CS50
konkors, fakultattiv opt-in opportunità

917
00:39:21,420 --> 00:39:25,580
nofs l-semestru, wara kollox minna kellhom
xi sitt jew seba 'ġimgħat ta' programmazzjoni

918
00:39:25,580 --> 00:39:30,100
fis-C taħt ċinturini tagħhom li jikkompetu,
jekk inti hekk choose-- darb'oħra

919
00:39:30,100 --> 00:39:32,460
fuq teams-- jippruvaw
issolvi kif ħafna sfidi

920
00:39:32,460 --> 00:39:36,160
kif inti tista 'fil ipprogrammar mal
ħbieb tal tiegħek kontra ħaddieħor.

921
00:39:36,160 --> 00:39:38,850
>> U lejn il-denb tal-semestru
se aħna charter xi xarabanks,

922
00:39:38,850 --> 00:39:40,850
fil-fatt tqatta 'xi żmien
fil-Cambridge, jekk youd

923
00:39:40,850 --> 00:39:43,460
simili biex jingħaqdu magħna, għall-
hekk imsejħa hackathon CS50.

924
00:39:43,460 --> 00:39:44,600
Fl 19:00 aħna ser tibda.

925
00:39:44,600 --> 00:39:45,970
Madwar 09:00, aħna ser ikollhom pizza.

926
00:39:45,970 --> 00:39:47,650
Madwar 01:00, aħna ser ikollhom burritos.

927
00:39:47,650 --> 00:39:50,550
U ħadd għadu imqajjem fuq il-
bus dar rikba madwar 05:00,

928
00:39:50,550 --> 00:39:54,070
aħna ser tieqaf off għal pancakes
fil IHOP fuq il-mod home--

929
00:39:54,070 --> 00:39:57,540
opportunità 12 siegħa li tgħaddas
ruħek mal-klassi u l-persunal

930
00:39:57,540 --> 00:39:59,950
fil-proġett finali tal-kors, il-
li hija opportunità

931
00:39:59,950 --> 00:40:01,870
li jmorru lil hinn mill-
settijiet problema kors ta

932
00:40:01,870 --> 00:40:05,950
u jfasslu u jimplimentaw l-aktar
xejn ta 'interess għalik,

933
00:40:05,950 --> 00:40:09,170
li finalment se jkun
dehru hawn fil Commons.

934
00:40:09,170 --> 00:40:12,510
L-ewwel fiera qatt CS50 kien l-aħħar
sena, wirja end-of semestru

935
00:40:12,510 --> 00:40:15,460
jew ċelebrazzjoni ta 'dak li kulħadd
fil-klassi kienet mwettqa,

936
00:40:15,460 --> 00:40:19,810
speċjalment dawk, għal darb'oħra, li marru minn
xejn għal xi ħaġa, minn żero sa 60,

937
00:40:19,810 --> 00:40:22,450
li m'għandha ebda isfond qabel
u li juru, finalment,

938
00:40:22,450 --> 00:40:26,960
xi ħaġa għall-kampus kollu u,
jekk onlajn, id-dinja biex tara, kif ukoll.

939
00:40:26,960 --> 00:40:30,780
>> Issa, dawn hawn huma biss ftit mill-
TAs u CAs li jagħmel CS50 possibbli.

940
00:40:30,780 --> 00:40:33,034
Ippermettuli li jistieden lil kull
ta 'dawk il-membri tal-persunal

941
00:40:33,034 --> 00:40:35,700
li huma hawn biex toħroġ fuq il-palk,
kif ukoll kapijiet tal-kors, il-

942
00:40:35,700 --> 00:40:38,785
li joffri xi kliem ta '
ispirazzjoni, kif ukoll.

943
00:40:38,785 --> 00:41:03,138

944
00:41:03,138 --> 00:41:03,950
>> ANDI: Hi, guys.

945
00:41:03,950 --> 00:41:05,290
Nista inti guys tismagħni?

946
00:41:05,290 --> 00:41:10,260
Grazzi għall-jingħaqdu magħna fuq din il-
sabiħ, b'xita il-Ħamis wara nofsinhar.

947
00:41:10,260 --> 00:41:11,010
Jisimni Andi.

948
00:41:11,010 --> 00:41:12,070
I'ma junior fil Berkeley.

949
00:41:12,070 --> 00:41:17,250
U flimkien ma 'Stelios u Sajf,
se nkunu tagħlim tliet kap tiegħek

950
00:41:17,250 --> 00:41:19,277
assistenti għal dan is-sena li jmiss.

951
00:41:19,277 --> 00:41:21,110
So, I raden, b'turija ta '
hands-- kif ħafna minnkom

952
00:41:21,110 --> 00:41:26,680
m'għandhom l-ebda intenzjoni li tkun CS
maġġuri u lanqas verament għadis profondament

953
00:41:26,680 --> 00:41:29,930
fis xjenza tal-kompjuter bħala prinċipali hawnhekk?

954
00:41:29,930 --> 00:41:30,520
Tal-biża.

955
00:41:30,520 --> 00:41:32,730
Li brillanti.

956
00:41:32,730 --> 00:41:35,850
>> Hekk jien attwalment kwistjonijiet globali
u maġġuri tax-xjenza konjittivi.

957
00:41:35,850 --> 00:41:37,780
I litteralment waslet għall
Yale bl-intenzjoni

958
00:41:37,780 --> 00:41:42,199
ta qatt ma jkollhom għalfejn tħares lejn
numru dejjem mill-ġdid fil-ħajja tiegħi.

959
00:41:42,199 --> 00:41:44,990
Meta Wasalt għall Yale, dan kien
xi ħaġa li qatt ma kien fuq radar tiegħi.

960
00:41:44,990 --> 00:41:46,460
Jien ridt li jitgħallmu dwar poeżija.

961
00:41:46,460 --> 00:41:48,500
Jien ridt li jitgħallmu dwar
affarijiet internazzjonali.

962
00:41:48,500 --> 00:41:50,510
Jien ridt li jitgħallmu dwar
tpinġijiet watercolor.

963
00:41:50,510 --> 00:41:53,360
Iva, noffru klassi
fuq tpinġijiet watercolor.

964
00:41:53,360 --> 00:41:57,340
>> Imma jien qatt ma kien interessat
f'xi ħaġa ZOKK relatati.

965
00:41:57,340 --> 00:41:59,620
Imma mbagħad lI anzjani
ltqajna, l-aktar I realizzati

966
00:41:59,620 --> 00:42:03,340
li kull qasam verament f'xi
sens timpjega xjenza tal-kompjuter,

967
00:42:03,340 --> 00:42:05,700
jew jekk le xjenza tal-kompjuter, komputazzjoni.

968
00:42:05,700 --> 00:42:08,300
Fil-fatt, għal dinjija tiegħi
affarijiet proġett capstone,

969
00:42:08,300 --> 00:42:12,020
aħna qed jużaw analytics data
biex tanalizza l-attakki terroristiċi

970
00:42:12,020 --> 00:42:13,680
għall Boko Haram fin-Niġerja.

971
00:42:13,680 --> 00:42:17,510
U hekk kif tistgħu taraw, irrispettivament
ta 'dak li maġġuri inti tispiċċa jsegwu

972
00:42:17,510 --> 00:42:21,640
jew dak interessi tiegħek hawn fil-Yale
huma, programmazzjoni u l-pedamenti

973
00:42:21,640 --> 00:42:24,130
ta 'kwalunkwe ħiliet huma super utli.

974
00:42:24,130 --> 00:42:29,840
U CS50 verament hija mgħammra tajjeb biex
tip ta jsellef ħafna riżorsi tagħha

975
00:42:29,840 --> 00:42:32,060
lilek, irrispettivament mill
kif komda int

976
00:42:32,060 --> 00:42:34,590
jew kif inti interessat
fl-insegwiment tal-klassi.

977
00:42:34,590 --> 00:42:37,290
>> Is-sajf ser jitkellmu ftit
ftit dwar dak li inti guys huma

978
00:42:37,290 --> 00:42:39,635
ser jitgħallmu dwar din is-sena.

979
00:42:39,635 --> 00:42:40,510
SAJF: Hi, kulħadd.

980
00:42:40,510 --> 00:42:41,320
Jien Sajf Wu.

981
00:42:41,320 --> 00:42:43,090
I'ma junior fil Morse.

982
00:42:43,090 --> 00:42:48,100
U jien attwalment beda
bħala student CS50 myself.

983
00:42:48,100 --> 00:42:51,460
Allura tliet snin ilu, I kien fuq sena vojt.

984
00:42:51,460 --> 00:42:53,940
I qatt ma d ħadet CS
klassi fl-iskola għolja,

985
00:42:53,940 --> 00:42:57,800
imma ħsibt dak fil-ħin liberu tiegħi,
huwa d jkun jibred biex jitgħallmu kif kodiċi.

986
00:42:57,800 --> 00:43:02,610
So I għamlet quick Google Tfittxija,
stenna għal dak li kien disponibbli fuq l-internet,

987
00:43:02,610 --> 00:43:06,990
u raw dan il-video ma 'Muppets
u DJs u websajts jibred.

988
00:43:06,990 --> 00:43:09,450
I kien simili, nixtieq li
jitgħallmu kif jagħmlu dan.

989
00:43:09,450 --> 00:43:14,690
>> So I ħa l-kors, u jien
biss waqa 'fl-imħabba miegħu.

990
00:43:14,690 --> 00:43:20,410
Imma niftakar li huma tant jealous tal-
gidjien li jistgħu jattendu l-hackathon,

991
00:43:20,410 --> 00:43:24,610
jattendu Puzzle Jum, jattendu l-uffiċċju
sigħat, jiksbu għajnuna minn TAs personalment.

992
00:43:24,610 --> 00:43:27,410
U hekk jien qatt ma immaġina
li I d jiksbu l-opportunità

993
00:43:27,410 --> 00:43:30,640
li hawn jiġu involuti fl
Matul dan l-ewwel ltqajna

994
00:43:30,640 --> 00:43:33,630
lili interessati fil-kompjuter
xjenza u hija r-raġuni għaliex

995
00:43:33,630 --> 00:43:35,690
I'ma xjenza tal-kompjuter kbir illum.

996
00:43:35,690 --> 00:43:39,290
So I ser twissi inti, din il-klassi
va biex tistira lilek.

997
00:43:39,290 --> 00:43:41,120
Huwa ser isfida inti.

998
00:43:41,120 --> 00:43:43,910
Iżda huwa wkoll ser
jgħallmu kif għandek tagħmel affarijiet għalik

999
00:43:43,910 --> 00:43:45,506
li int qatt ma immaġina inti tista '.

1000
00:43:45,506 --> 00:43:49,330

1001
00:43:49,330 --> 00:43:52,160
>> Stelios: Hi, kulħadd.

1002
00:43:52,160 --> 00:43:53,510
Jisimni Stelios.

1003
00:43:53,510 --> 00:43:58,240
I am a junior fil Branford
Kulleġġ u maġġuri KEFA.

1004
00:43:58,240 --> 00:44:01,640
Jien ukoll minn Ateni, il-Greċja.

1005
00:44:01,640 --> 00:44:03,830
Ninsab verament bil-ħerqa
sabiex jintlaħqu lilkom kollha,

1006
00:44:03,830 --> 00:44:09,010
chat miegħek fit-taqsima, fuq
ħinijiet tal-uffiċċju, fuq ikliet Ġimgħa.

1007
00:44:09,010 --> 00:44:11,250
Ninsab verament eċċitati għax
konna jitqiegħdu tant sforz

1008
00:44:11,250 --> 00:44:14,650
fil-ħolqien ta 'appoġġ uniku
istruttura għalikom

1009
00:44:14,650 --> 00:44:19,170
biex tagħmel l-esperjenza tiegħek ma '
Matul l-aħjar possibbli.

1010
00:44:19,170 --> 00:44:22,640
U nispera li għalkemm ħafna mill
inti probabilment ma ħadu CS

1011
00:44:22,640 --> 00:44:27,310
kors qabel, nispera li l-CS50
ghalik huwa dak xrar interess

1012
00:44:27,310 --> 00:44:30,260
li jsegwu ulterjorment kompjuter
xjenza fil-futur,

1013
00:44:30,260 --> 00:44:33,270
kif għamlet bil tant
ħafna nies fil-passat.

1014
00:44:33,270 --> 00:44:36,740
Allura nirringrazzjak talli
hawn, eċċitati biex tara int.

1015
00:44:36,740 --> 00:44:38,487
Jason Hirschhorn.

1016
00:44:38,487 --> 00:44:39,820
JASON Hirschhorn: Hi, kulħadd.

1017
00:44:39,820 --> 00:44:41,700
Jisimni Jason Hirschhorn.

1018
00:44:41,700 --> 00:44:43,050
I live in Silliman.

1019
00:44:43,050 --> 00:44:46,910
UI marru għall Harvard bħala Undergrad
u majored fl-istudji soċjali

1020
00:44:46,910 --> 00:44:48,870
u minored fix-xjenza tal-kompjuter.

1021
00:44:48,870 --> 00:44:53,100
U wieħed mill-irwoli ewlenin tiegħi hawn
huwa li jappoġġa dan il-persunal mill-isbaħ

1022
00:44:53,100 --> 00:44:54,630
kif huma jappoġġjaw inti kollha.

1023
00:44:54,630 --> 00:44:56,410
Fil-fatt, dan mhux kollha kemm huma.

1024
00:44:56,410 --> 00:45:01,230
Hemm 55 ggradwawx u
gradwati hawn biex jappoġġjaw inti kollha.

1025
00:45:01,230 --> 00:45:04,420
U jien daresay wieħed mill-aħjar
partijiet tal-kors għalik

1026
00:45:04,420 --> 00:45:08,080
kollox huwa jkollna biex jaħdmu ma
minnhom, saru jafu lilhom,

1027
00:45:08,080 --> 00:45:12,389
jkollna biex tara minnhom, kemm fil CS50
u barra ta 'CS50 dan is-semestru

1028
00:45:12,389 --> 00:45:13,680
u għal ħafna semestri li ġejjin.

1029
00:45:13,680 --> 00:45:16,770
Allura nisperaw li int ser tieħu l-
kors għaliex nisperaw li inti

1030
00:45:16,770 --> 00:45:21,060
nikseb li jinteraġixxu ma 'l-
persunal mill-isbaħ għandna fuq il-palk.

1031
00:45:21,060 --> 00:45:24,977
>> Speaker: Well, let me finitura
billi qal li se jkun gost.

1032
00:45:24,977 --> 00:45:26,810
DAVID Malan: Well,
grazzi lit-tim kollu tagħna.

1033
00:45:26,810 --> 00:45:29,610
Ippermettuli li dim-dwal u
jippermettu ftit aktar mill-tim tagħna,

1034
00:45:29,610 --> 00:45:32,890
kemm mill-Cambridge u New Haven,
biex jgħidu bonjour kif dawn guys fajl off.

1035
00:45:32,890 --> 00:45:36,130
U wara li se aħna transizzjoni għal
l-ewwel ta 'impenji ta' programmazzjoni tagħna

1036
00:45:36,130 --> 00:45:37,584
ma din il-lingwa imsejħa scratch.

1037
00:45:37,584 --> 00:45:38,500
Allura grazzi għall-iskwadra.

1038
00:45:38,500 --> 00:45:40,770
Ejja dim-dwal u
tisma 'minn ftit oħrajn.

1039
00:45:40,770 --> 00:45:44,207
>> [Applause]

1040
00:45:44,207 --> 00:45:45,680

1041
00:45:45,680 --> 00:45:48,140
>> [Daqq video]

1042
00:45:48,140 --> 00:45:53,210
>> -Il-Missjoni ta 'CS50 huwa li tagħmel inti
aktar komdi bi mod totalment ġdida

1043
00:45:53,210 --> 00:45:54,947
ta 'ħsieb, dan il-mentalità komputazzjoni.

1044
00:45:54,947 --> 00:45:56,780
-Hija Magħmula xjenza tal-kompjuter
interessanti, li

1045
00:45:56,780 --> 00:46:00,241
hija xi ħaġa I ma verament tirrealizza
kien possibbli sal I ħa l-klassi.

1046
00:46:00,241 --> 00:46:00,990
-I Kien simili, Whoa.

1047
00:46:00,990 --> 00:46:04,120
Ninsab verament traduzzjoni tal-ħsibijiet tiegħi
f'kompjuter dritt issa.

1048
00:46:04,120 --> 00:46:07,970
>> -Even Jekk inti ma għandekx kwalunkwe sfond
fix-xjenza tal-kompjuter jew xi esperjenza,

1049
00:46:07,970 --> 00:46:10,140
dan huwa effettivament il-klassi għalik.

1050
00:46:10,140 --> 00:46:12,250
>> -Allura I definitely jridu
-istudenti tiegħi għal ftit

1051
00:46:12,250 --> 00:46:14,350
nikseb eċċitati dwar ix-xjenza tal-kompjuter.

1052
00:46:14,350 --> 00:46:17,187
Mhux biss programmazzjoni, iżda
ħsieb bħal xjenzat kompjuter

1053
00:46:17,187 --> 00:46:19,270
huwa verament dak li nixtieq li
jippruvaw jgħallmu Freshman tiegħi.

1054
00:46:19,270 --> 00:46:21,560
>> -CS50 Huwa diffiċli u ppremjati.

1055
00:46:21,560 --> 00:46:22,592
>> esperjenza -An.

1056
00:46:22,592 --> 00:46:23,456
>> -Extravaganza.

1057
00:46:23,456 --> 00:46:26,350
>> -Hija S jġibu us għal-livell li jmiss.

1058
00:46:26,350 --> 00:46:28,850
>> [Ddoqq il-mużika]

1059
00:46:28,850 --> 00:46:32,167
>> -Il TFS huma, naħseb, il
ħajja tal-kors.

1060
00:46:32,167 --> 00:46:34,560
>> -I'm Eċċitati li jkollhom
-istudenti tiegħi jien jgħinu

1061
00:46:34,560 --> 00:46:38,027
jkollhom dik aha mument biex tirrealizza
dak li qed nipprovaw

1062
00:46:38,027 --> 00:46:39,610
biex tagħmel, biex insemmu kif jagħmlu pset.

1063
00:46:39,610 --> 00:46:41,438
>> definittivament -CS50 kors iebsa.

1064
00:46:41,438 --> 00:46:43,960
Iżda differenti minn kwalunkwe ieħor
kors verament fil-Yale,

1065
00:46:43,960 --> 00:46:45,759
dan ikollu din kbir,
komunità ta 'appoġġ.

1066
00:46:45,759 --> 00:46:47,550
-Inti Assolutament ma
bżonn tkun taf xejn

1067
00:46:47,550 --> 00:46:49,341
dwar kodifika biex ikunu jistgħu
biex tieħu l-kors.

1068
00:46:49,341 --> 00:46:52,270
-Hija Aqwa biex jaraw kemm
nies jidħlu fi semestru wieħed.

1069
00:46:52,270 --> 00:46:55,610
>> -Inti Ma kinux waħedhom seduta fil
kamra tiegħek tagħlim għall-kodiċi,

1070
00:46:55,610 --> 00:46:57,170
imma kien aktar minn sempliċiment klassi.

1071
00:46:57,170 --> 00:46:58,044
Kienet esperjenza.

1072
00:46:58,044 --> 00:47:02,500
-Il-Aħjar mod biex jitgħallmu kunċetti u
li jipproċessawha huwa billi tagħlim oħrajn.

1073
00:47:02,500 --> 00:47:04,033
>> Liema hija l-qasma tat-telefon?

1074
00:47:04,033 --> 00:47:06,934
>> [Ddoqq il-mużika]

1075
00:47:06,934 --> 00:47:08,080
>> -u Dan huwa CS50.

1076
00:47:08,080 --> 00:47:10,810
>> [Ddoqq il-mużika]

1077
00:47:10,810 --> 00:47:11,720

1078
00:47:11,720 --> 00:47:12,380
>> -Dan Huwa CS50.

1079
00:47:12,380 --> 00:47:13,446
>> -Got Problema?

1080
00:47:13,446 --> 00:47:14,852
Tiċrita min-nofs.

1081
00:47:14,852 --> 00:47:15,804
>> [Ddoqq il-mużika]

1082
00:47:15,804 --> 00:47:18,184
>> Armih.

1083
00:47:18,184 --> 00:47:19,520
>> DAVID Malan: Kull dritt.

1084
00:47:19,520 --> 00:47:23,190
Mela ejja tackle-- fi ftit
bit, inċidentalment, huwa

1085
00:47:23,190 --> 00:47:25,270
Kien din it-tradizzjoni għall
xi raġuni għal 10 snin

1086
00:47:25,270 --> 00:47:27,260
biex iservu kejk fil-
bidu u t-tmiem ta 'CS50.

1087
00:47:27,260 --> 00:47:30,800
Allura tistenna int fl-aħħar tal
Illum, minbarra l sillabi,

1088
00:47:30,800 --> 00:47:34,270
se jkun hemm xi kejk kif ukoll, u
persunal tal-kors li jgħidu bonjour.

1089
00:47:34,270 --> 00:47:37,110
Imma issa, ejja tranżizzjoni għat-
ewwel ta 'lingwi tagħna, fejn

1090
00:47:37,110 --> 00:47:40,970
aħna ser iqattgħu verament biss fil-ġimgħa u wieħed
problema stabbiliti fuq dan id-dominju, scratch.

1091
00:47:40,970 --> 00:47:43,160
U inti ser issib jekk inti stajt
programmati qabel, ħafna

1092
00:47:43,160 --> 00:47:46,280
ta 'l-ideat u l-
possibilitajiet huma familjari għalik.

1093
00:47:46,280 --> 00:47:48,160
Imma inti ser issib li
huwa gost tul it-triq

1094
00:47:48,160 --> 00:47:51,201
biex insemmu eżattament kif tittraduċi
xi wħud mill-ideat li inti diġà taf

1095
00:47:51,201 --> 00:47:53,852
għal dan l-ambjent partikolari
biex verament timpressjona familja tiegħek

1096
00:47:53,852 --> 00:47:57,060
u ħbieb ma 'xogħol tiegħek, li jista'
imorru online, jekk hekk jagħżlu, afterward.

1097
00:47:57,060 --> 00:47:58,851
>> U jekk ma jkollokx
esperjenza minn qabel u huma

1098
00:47:58,851 --> 00:48:01,540
fost il-maġġoranza ta '
studenti inqas komdu,

1099
00:48:01,540 --> 00:48:05,320
tirrealizza li ħafna mill-ideat aħna
biss esplorati ma 'affarijiet reality--

1100
00:48:05,320 --> 00:48:07,970
bħall-kotba tat-telefon u l-attendenza
u għalhekk forth-- tittraduċi

1101
00:48:07,970 --> 00:48:12,280
pjuttost nicely ma 'kompjuter,
imma mhux jekk inti tuża,

1102
00:48:12,280 --> 00:48:13,710
inizjalment, lingwa bħal dan.

1103
00:48:13,710 --> 00:48:16,290
Allura dan huwa programm bil-miktub
f'lingwa msejjħa Ċ

1104
00:48:16,290 --> 00:48:18,590
U aħna ser jonfqu pjuttost ftit
ta 'żmien fis-C, finalment.

1105
00:48:18,590 --> 00:48:22,560
Iżda odds huma, dan se tfittex ftit
cryptic lilek fl-ewwel daqqa t'għajn.

1106
00:48:22,560 --> 00:48:25,760
Fil-fatt, hemm ħafna ta 'stramb
sintassi, parentesi, brazzi angolu,

1107
00:48:25,760 --> 00:48:27,422
ċingi kaboċċi, kwotazzjonijiet, u semicolons.

1108
00:48:27,422 --> 00:48:29,880
U fil-fatt, jekk inti adsa fis
programmazzjoni għall-ewwel darba

1109
00:48:29,880 --> 00:48:33,420
tħares lejn u tipprova toħloq Jittieħed
bħal dan, onestament, ikollok hekk mired

1110
00:48:33,420 --> 00:48:36,500
hekk spiss fi ftit stupid
dettall li m'għandha x'taqsam xejn

1111
00:48:36,500 --> 00:48:38,240
intellettwalment interessanti dwar dan.

1112
00:48:38,240 --> 00:48:40,980
>> Imma immaġina jekk inti tista 'toħloq
din l-istess program-- li,

1113
00:48:40,980 --> 00:48:46,200
kif inti tista tip ta jiddeduċu, probabbilment
stampi "Hello, dinja" b'xi mod jew ieħor.

1114
00:48:46,200 --> 00:48:49,850
Nistgħu jiddistillaw l-istess idea fis
biss żewġ biċċiet puzzle, jekk inti se.

1115
00:48:49,850 --> 00:48:52,850
Tabilħaqq, Scratch huwa interessanti
għaliex dan huwa din il-lingwa grafika.

1116
00:48:52,850 --> 00:48:56,110
Inti tista 'ttawwal u qatra dawn
biċċiet puzzle li jorbtu ma 'xulxin biss

1117
00:48:56,110 --> 00:48:57,940
jekk jagħmel sens loġiku li jagħmlu dan.

1118
00:48:57,940 --> 00:48:59,830
U għalhekk fil Scratch,
aħna ser dalwaqt tara, dan huwa

1119
00:48:59,830 --> 00:49:03,460
kif inti jimplimentaw l-istess
programm, bil biss żewġ biċċiet puzzle

1120
00:49:03,460 --> 00:49:05,420
li pretty ħafna jagħmlu dak li jgħidu.

1121
00:49:05,420 --> 00:49:08,870
>> Iżda aħna ser tara fi ftit mument li xi
tal-blokki tal-bini li aħna evokati

1122
00:49:08,870 --> 00:49:12,140
li qabel u ftit aktar huma kollha li
aħħar mill-aħħar ser jikkostitwixxu

1123
00:49:12,140 --> 00:49:13,460
xi wħud mill-programmi kmieni tagħna.

1124
00:49:13,460 --> 00:49:15,460
Aħna ser jkollhom affarijiet
bħal functions-- biss

1125
00:49:15,460 --> 00:49:18,034
azzjonijiet li jagħmlu xi ħaġa,
bħal jgħidu bonjour, dinja.

1126
00:49:18,034 --> 00:49:20,200
Aħna qed tmur biex ikollhom linji,
affarijiet li jinduċu ċikli

1127
00:49:20,200 --> 00:49:23,210
għal darb'oħra u għal darb'oħra, bħad aħna
għamlet mument ilu ma 'tiftix

1128
00:49:23,210 --> 00:49:24,110
għal Mike Smith.

1129
00:49:24,110 --> 00:49:27,190
Varjabbli, bħal fl-alġebra, jekk inti
għandhom x jew y, li jista 'jaħżen numru.

1130
00:49:27,190 --> 00:49:29,940
Ukoll, fi programm, inti tista 'attwalment
jaħżen aktar minn sempliċiment numri.

1131
00:49:29,940 --> 00:49:34,290
Inti jista 'jaħżen kliem u sentenzi
u grafika u affarijiet oħra għadhom.

1132
00:49:34,290 --> 00:49:37,530
espressjonijiet Boolean, biss
questions-- iva jew le, vera jew falza.

1133
00:49:37,530 --> 00:49:40,680
Kundizzjonijiet, id-deċiżjonijiet teħid
ibbażati fuq dawk iva / le tweġibiet.

1134
00:49:40,680 --> 00:49:43,890
>> U affarijiet imbagħad fancier simili
firxa u ħjut u avvenimenti

1135
00:49:43,890 --> 00:49:46,100
u kull numru ta 'ieħor
karatteristiċi, iżda li kollha

1136
00:49:46,100 --> 00:49:48,670
Mappa ħafna nicely mal ħafna
blokki friendly bħal dan.

1137
00:49:48,670 --> 00:49:52,736
Din se tkun funzjoni, li
biċċa puzzle vjola li biss jgħid

1138
00:49:52,736 --> 00:49:54,717
dak l-isem tagħha is-- f'dan il-każ, jiġifieri.

1139
00:49:54,717 --> 00:49:56,550
U allura drabi, hemm
kaxxa bajda li inti

1140
00:49:56,550 --> 00:49:58,550
tista 'tip fi jew drag xi valur fis.

1141
00:49:58,550 --> 00:50:01,370
U dan huwa dak li ġeneralment
imsejħa argument jew parametru.

1142
00:50:01,370 --> 00:50:04,110
Huwa mod li tbiddel l-
imġiba inadempjenza ta 'puzzle

1143
00:50:04,110 --> 00:50:07,530
biċċa jew funzjoni sabiex ma
xi ħaġa użanza għalik simili qal,

1144
00:50:07,530 --> 00:50:12,570
bonjour, dinja jew bonjour, Andy jew bonjour,
Jason jew xi sentenza ieħor minflok.

1145
00:50:12,570 --> 00:50:15,830
>> Jekk inti tixtieq li jgħidu li
lot-- litteralment forever--

1146
00:50:15,830 --> 00:50:18,142
inti tista 'tieħu ieħor
biċċa puzzle imsejħa dejjem

1147
00:50:18,142 --> 00:50:20,100
u biss mgħaffeġ l
tnejn flimkien bħal dan.

1148
00:50:20,100 --> 00:50:24,090
U li loop, bħala l-istampa jissuġġerixxi,
tfisser biss jgħidu bonjour, dinja dejjem,

1149
00:50:24,090 --> 00:50:25,810
ġdid u għal darb'oħra u għal darb'oħra.

1150
00:50:25,810 --> 00:50:28,840
Jew, jekk inti biss tixtieq li tagħmel dan għal
numru finit ta 'drabi, bħal 50 darba,

1151
00:50:28,840 --> 00:50:32,050
hemm għaddej li jkun puzzle ieħor
biċċa għall that-- irrepeti 50 darba.

1152
00:50:32,050 --> 00:50:34,190
>> Sadanittant, jekk inti tixtieq
li jkollhom varjabbli

1153
00:50:34,190 --> 00:50:36,090
f'din il-lingwa nkunu
dwar jilagħbu ma ',

1154
00:50:36,090 --> 00:50:37,880
inti tista 'tuża blokk oranġjo bħal dan.

1155
00:50:37,880 --> 00:50:40,750
U dan il-varjabbli jien arbitrarju
sejjaħ i għall-eqreb numru sħiħ.

1156
00:50:40,750 --> 00:50:42,290
U jien biss sett huwa ugwali għal 0.

1157
00:50:42,290 --> 00:50:44,780
U hekk forsi I, f'dan il-
case-- din il variable--

1158
00:50:44,780 --> 00:50:46,630
jirrappreżenta punteġġ xi ħadd fil-logħba.

1159
00:50:46,630 --> 00:50:49,680
Tibda għal żero, u kull darba li inti
jagħmlu għan jew xi ħaġa bħal dik,

1160
00:50:49,680 --> 00:50:51,270
ikollok punt wieħed addizzjonali.

1161
00:50:51,270 --> 00:50:52,830
>> Tista 'jistaqsi mistoqsijiet fil scratch.

1162
00:50:52,830 --> 00:50:55,390
Jekk aħna drag u qatra puzzle
biċċiet fil-mument bħal dan,

1163
00:50:55,390 --> 00:50:58,470
inti tista 'tistaqsi mistoqsijiet bħal,
ukoll, huwa i inqas minn 50?

1164
00:50:58,470 --> 00:51:00,060
Forsi inti bżonn 50 punt biex tirbaħ.

1165
00:51:00,060 --> 00:51:01,893
U għalhekk dan ikun
il-kwistjoni youd titlob.

1166
00:51:01,893 --> 00:51:04,030
Jew, b'mod iktar ġenerali, inti
jista 'jgħid hu x inqas minn y,

1167
00:51:04,030 --> 00:51:05,780
fejn hemm żewġ fatturi varjabbli involuti?

1168
00:51:05,780 --> 00:51:08,320
Issa, dan huwa wieħed lott
akbar fl-ewwel daqqa t'għajn,

1169
00:51:08,320 --> 00:51:11,470
imma verament mhux kollha li aktar kumplessi.

1170
00:51:11,470 --> 00:51:15,390
>> Dan huwa biss kombinazzjoni
tal-kundizzjonijiet u varjabbli

1171
00:51:15,390 --> 00:51:19,370
u espressjonijiet Boolean li jistaqsu
tliet questions-- huwa x inqas minn y?

1172
00:51:19,370 --> 00:51:20,660
Jekk iva, tgħid hekk.

1173
00:51:20,660 --> 00:51:22,170
Say, x hija inqas minn y.

1174
00:51:22,170 --> 00:51:26,571
Inkella, jekk x huwa akbar minn
y, inkella x irid ikun ugwali għal y.

1175
00:51:26,571 --> 00:51:29,070
U billi ma 'Mike Smith,
kien hemm erba 'xenarji, hawnhekk

1176
00:51:29,070 --> 00:51:32,270
fid-dinja ta 'numri, x hija jew
inqas minn, akbar minn, jew daqs.

1177
00:51:32,270 --> 00:51:34,531
Kollha għandna huma tliet frieket fl-triq.

1178
00:51:34,531 --> 00:51:36,530
U allura hemm fancier
biċċiet puzzle bħal dan

1179
00:51:36,530 --> 00:51:39,613
għal affarijiet simili arrays, fejn aħna qed
ser ikunu kapaċi li jaħżnu l-informazzjoni.

1180
00:51:39,613 --> 00:51:43,590
Aħna qed tmur biex tara blokki li jippermettu
ahna jimplimentaw ħjut multipli,

1181
00:51:43,590 --> 00:51:46,620
Karatteristika oħra aħna ser jintużaw, u
allura wkoll xi ħaġa imsejħa avvenimenti.

1182
00:51:46,620 --> 00:51:49,390
Iżda qabel ma nikbru għal dan
punt u joħolqu saħansitra,

1183
00:51:49,390 --> 00:51:52,000
finalment, użanza tagħna stess
biċċiet puzzle, ejja

1184
00:51:52,000 --> 00:51:53,950
attwalment tiftaħ il-programm innifsu.

1185
00:51:53,950 --> 00:51:54,860
>> Allura dan huwa scratch.

1186
00:51:54,860 --> 00:51:57,490
Huwa disponibbli fuq scratch.mit.edu.

1187
00:51:57,490 --> 00:51:59,650
U inti qed jilqgħu biex jilgħabu
issa jew aktar tard, kif ukoll.

1188
00:51:59,650 --> 00:52:01,330
Dan jiġri li jkun l-verżjoni offline.

1189
00:52:01,330 --> 00:52:03,129
Għall-persuni li m'għandhomx
neċessarjament internet kbira,

1190
00:52:03,129 --> 00:52:04,962
inti tista 'tniżżel il-
istess software, kif ukoll.

1191
00:52:04,962 --> 00:52:07,460
U hemm verament biss tlieta
komponenti għal dan is-software.

1192
00:52:07,460 --> 00:52:10,860
Fuq il-quċċata rokna tan-naħa tax-xellug tal
-iskrin huwa t-tip ta 'stadju

1193
00:52:10,860 --> 00:52:13,800
li Scratch, li fil-kontumaċja
qisu qattus, jgħix ġewwa.

1194
00:52:13,800 --> 00:52:16,799
Huwa jista 'jiċċaqlaq up, down, xellug, u d-dritt
u jagħmlu kull numru ta 'affarijiet oħra,

1195
00:52:16,799 --> 00:52:20,520
u tista 'tfittex kull numru ta' modi bbażati
fuq il-kostumi li inti tassenja lilu.

1196
00:52:20,520 --> 00:52:22,980
Imma dan huwa dak li aħna ser sejħa
Sprite, tip ta 'karattru.

1197
00:52:22,980 --> 00:52:25,429
U inti jista 'jkollhom multipli
karattri, kif aħna ser dalwaqt tara.

1198
00:52:25,429 --> 00:52:30,060
>> Fin-nofs issa huma dawn kollha puzzle
biċċiet u dawn il-kategoriji jew il-paliti

1199
00:52:30,060 --> 00:52:30,900
tiegħu.

1200
00:52:30,900 --> 00:52:32,429
Allura issa dritt, jien għafast fuq Mozzjoni.

1201
00:52:32,429 --> 00:52:35,900
U hekk jien jaraw kollha ta 'l-
biċċiet puzzle jew blokki relatati mal-mozzjoni,

1202
00:52:35,900 --> 00:52:37,950
hekk funzjonijiet li għandhom
li tagħmel ma jitla ',

1203
00:52:37,950 --> 00:52:39,950
isfel, xellug, jew dritt jew
xi operazzjoni oħra.

1204
00:52:39,950 --> 00:52:43,790
Imma jekk jien għafast fuq Jistenna, inti
tista 'tara l-affarijiet bħall-blokk ngħidu aħna

1205
00:52:43,790 --> 00:52:45,084
li rajna ftit mument ilu.

1206
00:52:45,084 --> 00:52:48,250
U jekk jien ikklikkja fuq Kontroll, tkun taf tara
affarijiet bħall-irrepeti u l dejjem

1207
00:52:48,250 --> 00:52:50,410
u l-, jekk blokk li
rajna mument ilu.

1208
00:52:50,410 --> 00:52:51,670
>> U għalhekk inti ser issib
li aħna ser biss scratch

1209
00:52:51,670 --> 00:52:53,750
il-wiċċ ta 'xi wħud l-
puzzle biċċiet flimkien,

1210
00:52:53,750 --> 00:52:55,833
iżda huwa kollu pjuttost intuwittivi
u l-punt u ikklikkja.

1211
00:52:55,833 --> 00:52:58,219
Tabilħaqq, Scratch kien maħsub
għall-istudenti żgħar

1212
00:52:58,219 --> 00:53:00,730
biex tgħin jagħtuhom żbokk
għall-ħsieb kreattiv.

1213
00:53:00,730 --> 00:53:03,040
And yet wonderfully, huwa
tarġa isbaħ

1214
00:53:03,040 --> 00:53:07,020
li eżattament l-ideat aħna qed tmur biex
tesplora Ċ u Python u JavaScript,

1215
00:53:07,020 --> 00:53:07,719
kif ukoll.

1216
00:53:07,719 --> 00:53:11,960
>> Fuq in-naħa tal-lemin, fl-aħħarnett, hawnhekk
huwa dan, l-hekk imsejħa żona skripts.

1217
00:53:11,960 --> 00:53:15,750
U dan huwa biss il-lavanja vojt bl
li tibda tikteb programm.

1218
00:53:15,750 --> 00:53:16,897
U jien ser eżattament dan.

1219
00:53:16,897 --> 00:53:19,980
Issa, I jiġri li tkun taf fejn affarijiet huma
minħabba I ghamilt dan il għal xi ftit drabi.

1220
00:53:19,980 --> 00:53:22,710
Imma naf li taħt
il-kategorija Avvenimenti,

1221
00:53:22,710 --> 00:53:25,520
hemm dan here-- blokk
meta bandiera aħdar għafast.

1222
00:53:25,520 --> 00:53:28,790
U Avviż jekk I zoom out u
lura f'aktar minn hawn fix-xena,

1223
00:53:28,790 --> 00:53:31,190
ħajjiet Scratch fi ħdan dan
ftit dinja rettangolari,

1224
00:53:31,190 --> 00:53:33,920
atop li hija ħadra
bandiera u sinjal waqfien aħmar.

1225
00:53:33,920 --> 00:53:36,180
Allura jmorru u jieqfu, rispettivament.

1226
00:53:36,180 --> 00:53:38,710
>> U hekk dak do I trid tagħmel
meta dik il-bandiera ħadra huwa għafast?

1227
00:53:38,710 --> 00:53:40,900
Well, let me go għal dak Jistenna kategorija.

1228
00:53:40,900 --> 00:53:43,357
U let me imorru quddiem
u drag u qatra din il.

1229
00:53:43,357 --> 00:53:45,940
U avviż hekk kif jiġrilha
qrib, dawn qed tip ta manjetiċi.

1230
00:53:45,940 --> 00:53:48,489
Mela jekk jien issa let go, snaps
flimkien sbieħ u nadif.

1231
00:53:48,489 --> 00:53:51,030
U jien ser jimxi 'l quddiem u
ngħid xi ħaġa simili bonjour, dinja

1232
00:53:51,030 --> 00:53:52,190
għal żewġ sekondi.

1233
00:53:52,190 --> 00:53:56,730
Let me zoom out u kklikkja issa l
bandiera aħdar, u jgħidu, bonjour, dinja.

1234
00:53:56,730 --> 00:53:57,230
Kull dritt.

1235
00:53:57,230 --> 00:53:58,460
Allura li kollox multa u tajba.

1236
00:53:58,460 --> 00:53:59,900
Mhux kollha li eċċitanti.

1237
00:53:59,900 --> 00:54:01,340
Ejja jagħmilha cuter ftit.

1238
00:54:01,340 --> 00:54:03,494
U naf li fil
quddiem, Scratch jiġri

1239
00:54:03,494 --> 00:54:05,160
li ġejjin ma 'xi affarijiet ħelu bħal dan.

1240
00:54:05,160 --> 00:54:07,720
Allura play meow ħoss sakemm isir.

1241
00:54:07,720 --> 00:54:09,531
Mela ejja tagħmel dan.

1242
00:54:09,531 --> 00:54:10,380
>> [MJAW]

1243
00:54:10,380 --> 00:54:11,819
>> Aw, dan huwa adorable.

1244
00:54:11,819 --> 00:54:12,860
U jekk jien ikklikkja again--

1245
00:54:12,860 --> 00:54:14,920
>> [MJAW]

1246
00:54:14,920 --> 00:54:15,460
>> U għal darb'oħra.

1247
00:54:15,460 --> 00:54:16,740
>> [MJAW]

1248
00:54:16,740 --> 00:54:18,760
>> Imma I iżommu jkollhom reanimate scratch.

1249
00:54:18,760 --> 00:54:20,010
Imma I tista 'tagħmel aħjar minn hekk.

1250
00:54:20,010 --> 00:54:23,060
Għaliex ma I biss drag tlieta minn dawn.

1251
00:54:23,060 --> 00:54:24,821
U issa huwa tliet darbiet aktar adorable.

1252
00:54:24,821 --> 00:54:26,264
>> [Meowing]

1253
00:54:26,264 --> 00:54:28,190
>> OK, fil-fatt, huwa ftit creepy.

1254
00:54:28,190 --> 00:54:31,020
Għalhekk għandna bżonn xi ħaġa bejn hemmhekk.

1255
00:54:31,020 --> 00:54:33,870
Jekk immur Kontroll, jidher qisu
hemm attwalment blokk stenna.

1256
00:54:33,870 --> 00:54:36,994
U hekk Avviż jekk I imbagħad jerġgħu jsiru fuq there--
u let me tagħmel dan ftit akbar.

1257
00:54:36,994 --> 00:54:38,780
Jekk I imbagħad jerġgħu, li għaddej
li snap fil-post.

1258
00:54:38,780 --> 00:54:41,660
Allura stenna sekonda waħda, stenna sekonda waħda.

1259
00:54:41,660 --> 00:54:43,170
Ejja hit bandiera aħdar darb'oħra.

1260
00:54:43,170 --> 00:54:46,330
>> [Meowing]

1261
00:54:46,330 --> 00:54:47,695

1262
00:54:47,695 --> 00:54:50,660
>> OK, ftit aktar naturali,
iżda mhux effiċjenti ħafna.

1263
00:54:50,660 --> 00:54:54,300
Allura dan huwa korrett jekk il-programm tiegħi
għan kien meow tliet darbiet.

1264
00:54:54,300 --> 00:54:56,410
Iżda huwa ma tantx mfassla tajjeb.

1265
00:54:56,410 --> 00:54:57,740
I tip ta 'cut xi kantunieri.

1266
00:54:57,740 --> 00:54:58,730
Sibt ftit għażżien.

1267
00:54:58,730 --> 00:55:05,620
Dak li jħoss like-- x'għandi nagħmel jidhirx
li għamlu ħażin, tgħid?

1268
00:55:05,620 --> 00:55:07,197
Yeah?

1269
00:55:07,197 --> 00:55:08,030
Yeah, fin-nofs.

1270
00:55:08,030 --> 00:55:11,208

1271
00:55:11,208 --> 00:55:13,083
UDJENZA: Użati aktar
Memorja milli għandek bżonn biex

1272
00:55:13,083 --> 00:55:15,005
għaliex inti qed tuża
Linja differenti tant.

1273
00:55:15,005 --> 00:55:16,380
DAVID Malan: Yeah, hekk aktar linji.

1274
00:55:16,380 --> 00:55:19,190
U ma jkunx neċessarjament memorja,
għalkemm din tista 'titqies bħala li mod.

1275
00:55:19,190 --> 00:55:20,898
Iżda huwa definitely--
hemm sensja.

1276
00:55:20,898 --> 00:55:23,440
U jien litteralment tip ta mkaxkra
u niżel l-istess affarijiet.

1277
00:55:23,440 --> 00:55:26,564
U jekk inti tip ta extrapolate-- jekk
mhuwiex ovvju here-- tajjeb, kif ikun

1278
00:55:26,564 --> 00:55:27,910
I meow 30 darba?

1279
00:55:27,910 --> 00:55:31,450
Nixtieq drag u qatra, bħal,
30 pari aktar ta 'biċċiet puzzle.

1280
00:55:31,450 --> 00:55:32,890
U żgur, hemm mod aħjar.

1281
00:55:32,890 --> 00:55:34,056
U aħna stajt tidher b'mod aħjar.

1282
00:55:34,056 --> 00:55:36,870
Liema intuwittivament kieku
jkun il-mod aħjar?

1283
00:55:36,870 --> 00:55:37,890
Yeah, biss użu loop.

1284
00:55:37,890 --> 00:55:38,810
Nru kopja u paste.

1285
00:55:38,810 --> 00:55:40,790
U fil-fatt, f'kull waqt din il
semestru jekk tibda

1286
00:55:40,790 --> 00:55:43,890
konstatazzjoni yourself jittrattienu u twaqqa,
jew verament ikkupjar u pasta,

1287
00:55:43,890 --> 00:55:47,050
vizzju perikolużi li jsibu rwieħhom minħabba
dan huwa biss mhux maintainable ħafna.

1288
00:55:47,050 --> 00:55:49,740
Per eżempju, jekk I trid tibdel
il-ħoss għal xi ħaġa oħra,

1289
00:55:49,740 --> 00:55:52,826
Għandi biex jibdlu issa fi tliet
postijiet minflok waħda biss.

1290
00:55:52,826 --> 00:55:54,575
Minħabba li fil-fatt, jekk I
jiksru dan away-- jien

1291
00:55:54,575 --> 00:55:56,170
biss se jinfired dan bħal dik.

1292
00:55:56,170 --> 00:56:01,900
Let me grab blokk ripetuta, u
imbagħad ikklikkja tlieta, it-tip tlieta,

1293
00:56:01,900 --> 00:56:04,015
tarmi xi wħud minn dawn
bogħod bi ftit kiri go.

1294
00:56:04,015 --> 00:56:05,890
U allura tinnota li
ma look like taqbel,

1295
00:56:05,890 --> 00:56:08,139
iżda manjetikament, li għaddej
li mhux biss snap fis-seħħ

1296
00:56:08,139 --> 00:56:09,510
iżda jikber biex jitwaħħal il-forma.

1297
00:56:09,510 --> 00:56:10,310
Allura li tajjeb.

1298
00:56:10,310 --> 00:56:11,530
U issa jekk jien ikklikkja play.

1299
00:56:11,530 --> 00:56:13,870
>> [Meowing]

1300
00:56:13,870 --> 00:56:14,370

1301
00:56:14,370 --> 00:56:15,620
Sbieħ ħafna.

1302
00:56:15,620 --> 00:56:16,126
Kull dritt.

1303
00:56:16,126 --> 00:56:18,500
U issa huwa faċli ħafna li
bidla, wisq, minħabba I tista 'sempliċement

1304
00:56:18,500 --> 00:56:20,670
jibdlu n-numru wieħed f'post wieħed.

1305
00:56:20,670 --> 00:56:22,500
Iżda dan, wisq, mhix
dak kollu li interessanti.

1306
00:56:22,500 --> 00:56:25,350
Ejja fil-fatt ikollhom
Scratch mhux meow, iżda jiċċaqalqu.

1307
00:56:25,350 --> 00:56:32,680
Let me mur Mozzjoni u jimxu 10 passi
ġewwa of-- Whoops, let me jiffissaw dan.

1308
00:56:32,680 --> 00:56:37,460
Let me jkollhom dan tmexxi 10 steps--
fil-fatt, ejja ma do jirrepetu.

1309
00:56:37,460 --> 00:56:40,670
Let me grab blokk ta 'kontroll,
u jagħmel dan li ġej għal dejjem.

1310
00:56:40,670 --> 00:56:42,720
Forever, jimxu 10 passi.

1311
00:56:42,720 --> 00:56:45,070
U kklikkja Play.

1312
00:56:45,070 --> 00:56:45,600
>> KOLLOX SEW.

1313
00:56:45,600 --> 00:56:46,740
Hekk Thankfully, huwa jieqaf.

1314
00:56:46,740 --> 00:56:49,710
Inkella, gidjien se tikseb ħafna taqlib
meta tip ta 'jitilfu qtates tagħhom.

1315
00:56:49,710 --> 00:56:52,720
Imma l-anqas jien tista 'ttawwal
lilu lura fil-iskrin.

1316
00:56:52,720 --> 00:56:56,177
Iżda dan mhux kollox li
kbira ta 'logħba jew animazzjoni.

1317
00:56:56,177 --> 00:56:58,260
Ikun sbieħ jekk forsi
huwa irkupra off-tarf.

1318
00:56:58,260 --> 00:57:00,020
Allura dak li nagħmlu?

1319
00:57:00,020 --> 00:57:04,302
Dak jibnu għandna bżonn li jkollhom
Scratch jiddeċiedi li bounce, do you think,

1320
00:57:04,302 --> 00:57:06,010
anki jekk inti stajt qatt
tidher Scratch qabel?

1321
00:57:06,010 --> 00:57:06,593
Yeah, fid-dahar.

1322
00:57:06,593 --> 00:57:08,359
UDJENZA: Għandek bżonn ta '
jekk blokk jew jekk 'mbagħad.

1323
00:57:08,359 --> 00:57:10,650
DAVID Malan: Yeah, għalhekk xi
tip ta 'jekk blokka jew jekk' mbagħad.

1324
00:57:10,650 --> 00:57:12,275
Allura fil-fatt, aħna għandna waħda minn dawn hawn.

1325
00:57:12,275 --> 00:57:14,500
Mela if-- so let me nikseb
rid tal-moviment.

1326
00:57:14,500 --> 00:57:16,070
Let me zoom fl hekk huwa akbar.

1327
00:57:16,070 --> 00:57:16,890
Allura kif dwar dan.

1328
00:57:16,890 --> 00:57:21,920
Forever, jekk Sensing--
konna ma bbenefikawx dan qabel.

1329
00:57:21,920 --> 00:57:23,160
I ħtieġa espressjoni Boolean.

1330
00:57:23,160 --> 00:57:25,970
U jirriżulta jekk jmissu liema?

1331
00:57:25,970 --> 00:57:29,030
Jekk jmiss it-tarf,
dak li nixtieq do?

1332
00:57:29,030 --> 00:57:32,030
Ukoll, jekk immur lura għall-Mozzjoni,
jirriżulta, oh, I jistgħu jduru madwar.

1333
00:57:32,030 --> 00:57:33,350
Let me drag dan hawn.

1334
00:57:33,350 --> 00:57:36,430
Għaliex ma I jimxi 'l quddiem u
jdur 180 gradi?

1335
00:57:36,430 --> 00:57:38,190
>> U issa, let me biss jimxu fl-aħħar.

1336
00:57:38,190 --> 00:57:40,500
I tista 'tpoġġi l-moviment lejn
-bidu jew fit-tmiem.

1337
00:57:40,500 --> 00:57:44,452
Iżda loġikament, kull darba I jiċċaqalqu, I
tkun trid tivverifika, jien jmiss it-tarf?

1338
00:57:44,452 --> 00:57:45,410
Am I jmiss it-tarf?

1339
00:57:45,410 --> 00:57:46,490
Am I jmiss it-tarf?

1340
00:57:46,490 --> 00:57:49,200
Allura li loġikament ndur madwar jekk hekk.

1341
00:57:49,200 --> 00:57:51,190
Mela ejja hit play.

1342
00:57:51,190 --> 00:57:52,030
>> KOLLOX SEW.

1343
00:57:52,030 --> 00:57:53,910
Allura huwa kemmxejn Buggy, biex ngħidu hekk.

1344
00:57:53,910 --> 00:57:56,560
U bug huwa biss żball
fi programm tal-kompjuter.

1345
00:57:56,560 --> 00:57:57,800
Imma l-anqas huwa xogħol.

1346
00:57:57,800 --> 00:57:59,420
U fil-fatt, I tista 'tmur fil hawn.

1347
00:57:59,420 --> 00:58:03,130
U let me tagħmel dan ma '10 passi fi
żmien, iżda din hija kollha animazzjoni hu.

1348
00:58:03,130 --> 00:58:05,310
Din hija kollha cartoons
jew saħansitra movie hu.

1349
00:58:05,310 --> 00:58:07,110
Let me jimxu 20 passi fi żmien.

1350
00:58:07,110 --> 00:58:11,200
Hekk 20 darbiet kif ħafna affarijiet qed jiġri
darba, jew darbtejn kif ħafna, f'dan il-każ.

1351
00:58:11,200 --> 00:58:12,600
U hu jiċċaqilqu aktar mgħaġġla.

1352
00:58:12,600 --> 00:58:15,150
Let me bidla għal 30.

1353
00:58:15,150 --> 00:58:17,450
100.

1354
00:58:17,450 --> 00:58:19,406
1000.

1355
00:58:19,406 --> 00:58:20,530
U li għaddej verament mgħaġġel.

1356
00:58:20,530 --> 00:58:22,190
U dan is-- yeah, OK.

1357
00:58:22,190 --> 00:58:24,130
>> Allura issa aħna qed biss messing magħha.

1358
00:58:24,130 --> 00:58:24,954
OK, hekk Buggy.

1359
00:58:24,954 --> 00:58:26,620
Iżda aħna tista 'ttawwal lilu mill-mod hawn.

1360
00:58:26,620 --> 00:58:28,286
Iżda nistgħu nagħmlu aktar divertenti ma 'dan, wisq.

1361
00:58:28,286 --> 00:58:30,710
Kif dwar this-- hu rasu 'l isfel.

1362
00:58:30,710 --> 00:58:32,800
Iżda jirriżulta Scratch--
u hemm attwalment,

1363
00:58:32,800 --> 00:58:35,510
Irrid jiċħadx, l-ebda akkademika
valur għal dak li jien ser tagħmel.

1364
00:58:35,510 --> 00:58:40,200
Imma jekk jien jiftħu l-mikrofonu, ejja
twaqqaf lilu u jagħmel xi ħaġa bħal din.

1365
00:58:40,200 --> 00:58:41,960
Ouch!

1366
00:58:41,960 --> 00:58:42,884
>> [Tidħaq]

1367
00:58:42,884 --> 00:58:45,200

1368
00:58:45,200 --> 00:58:45,990
>> Dan kien adorable.

1369
00:58:45,990 --> 00:58:46,740
Grazzi.

1370
00:58:46,740 --> 00:58:50,850
Issa, dan huwa dak li l-vuċi tiegħi
Dehra meta I Yell Ouch.

1371
00:58:50,850 --> 00:58:52,630
I do not think we maqbuda Rires tiegħek.

1372
00:58:52,630 --> 00:58:53,280
Kollox sew.

1373
00:58:53,280 --> 00:58:56,550
Let me jiffranka dan bħala "Ouch."

1374
00:58:56,550 --> 00:58:57,915
Ejja tiffranka dan bħala "Ouch".

1375
00:58:57,915 --> 00:58:59,410
U issa aħna ser jmorru lura għall skripts.

1376
00:58:59,410 --> 00:59:01,660
U issa jien need-- ejja ara, Sound.

1377
00:59:01,660 --> 00:59:03,160
Oh, play Ouch ħoss.

1378
00:59:03,160 --> 00:59:08,180
Mela jekk jien jmiss it-tarf, let me
ewwel play Ouch, u mbagħad idur.

1379
00:59:08,180 --> 00:59:10,191
U issa ejja tpoġġi lilu fin-nofs.

1380
00:59:10,191 --> 00:59:14,754
>> [Qal "Ouch"]

1381
00:59:14,754 --> 00:59:15,740
>> Darbtejn aktar malajr.

1382
00:59:15,740 --> 00:59:20,660

1383
00:59:20,660 --> 00:59:21,830
>> KOLLOX SEW.

1384
00:59:21,830 --> 00:59:23,780
Iżda huwa litteralment
tagħmel dak li jien tgħid.

1385
00:59:23,780 --> 00:59:27,580
Għalhekk huwa fil-fatt korretta, huwa
biss ftit annoying malajr.

1386
00:59:27,580 --> 00:59:30,330
Mela ejja żid xi ħaġa
aktar interessanti għal dan.

1387
00:59:30,330 --> 00:59:32,950
Let me attwalment jiftħu
wieħed li għamilt qabel,

1388
00:59:32,950 --> 00:59:38,560
aptly imsejjaħ Pet il
Cat, li ma dan.

1389
00:59:38,560 --> 00:59:40,340
Hawn il-iskrittura hawn.

1390
00:59:40,340 --> 00:59:44,510
X'inhu dan se
do f'termini Ingliż?

1391
00:59:44,510 --> 00:59:45,820
X'hemm dan mfassla biex jagħmlu?

1392
00:59:45,820 --> 00:59:47,900
Yeah, ejja go some-- yeah?

1393
00:59:47,900 --> 00:59:49,665
>> UDJENZA: Meta inti
domestiċi il-qattus, dan meows.

1394
00:59:49,665 --> 00:59:52,290
DAVID Malan: Yeah, hekk meta inti
domestiċi il-qattus, li għaddej biex meow.

1395
00:59:52,290 --> 00:59:55,452
Allura fi kliem ieħor, issa hemm
a dejjem loop xorta, flimkien

1396
00:59:55,452 --> 00:59:57,660
bil-kundizzjoni, flimkien
bil-espressjoni Boolean,

1397
00:59:57,660 --> 01:00:00,140
flimkien ma 'koppja
tal-funzjonijiet, l-effett

1398
01:00:00,140 --> 01:00:02,610
li minnhom, la darba I play
dan il-programm, huwa xejn

1399
01:00:02,610 --> 01:00:06,820
jiġri sal I tmexxi l-cursor
eqreb u eqreb u eqreb and--

1400
01:00:06,820 --> 01:00:08,029
>> [MJAW]

1401
01:00:08,029 --> 01:00:09,320
Imbagħad huwa simili petting-qattus.

1402
01:00:09,320 --> 01:00:11,210
[MJAW]

1403
01:00:11,210 --> 01:00:14,270
Biss ladarba inti fil-fatt
tmexxi l-cursor fuq lilu.

1404
01:00:14,270 --> 01:00:19,964
Issa, I wkoll bit-tarjola up ma domestiċi
il-qattus, li ma dan minflok.

1405
01:00:19,964 --> 01:00:21,350
>> [Meowing]

1406
01:00:21,350 --> 01:00:23,485
>> Hekk hu biss b'mod kostanti meowing.

1407
01:00:23,485 --> 01:00:24,455
>> [Meowing]

1408
01:00:24,455 --> 01:00:27,705
>> Imma jekk jien nikseb wisq close--

1409
01:00:27,705 --> 01:00:29,645
>> [Meowing]

1410
01:00:29,645 --> 01:00:32,080
>> [Roar]

1411
01:00:32,080 --> 01:00:33,590
>> Allura kif ma dan ix-xogħol?

1412
01:00:33,590 --> 01:00:35,880
Issa I biss jkollhom
two-way furketta fit-triq.

1413
01:00:35,880 --> 01:00:38,930
Jekk jmissu mouse pointer,
mbagħad jilagħbu l-ħoss iljun.

1414
01:00:38,930 --> 01:00:41,950
Inkella biss jilagħbu l-ħoss meow,
u mbagħad stenna tliet sekondi hekk

1415
01:00:41,950 --> 01:00:43,880
li huwa tip ta 'kif isir
huwa ferm tranquilly.

1416
01:00:43,880 --> 01:00:44,380
Kull dritt.

1417
01:00:44,380 --> 01:00:47,290
Allura dak li jgħaqqad
xi ideat aktar għadhom.

1418
01:00:47,290 --> 01:00:50,870
Ejja tagħti ħarsa lejn dan l-eżempju
I bit-tarjola up imsejħa ħjut.

1419
01:00:50,870 --> 01:00:54,020
U dan huwa wieħed fundamentalment
differenti minħabba li tiggwida

1420
01:00:54,020 --> 01:00:56,070
karatteristika ta 'ħafna
lingwa ta 'programmar imsejħa

1421
01:00:56,070 --> 01:00:59,970
ħjut, l-abbiltà ta 'programm li
litteralment tagħmel żewġ affarijiet fl-istess ħin.

1422
01:00:59,970 --> 01:01:03,600
Tabilħaqq, dawn il-jiem jekk inti qed tuża
Google Docs jew Microsoft Word,

1423
01:01:03,600 --> 01:01:09,620
u dokument tiegħek kostanti li qed
jespliċitaw-ikkontrollati anke kif inti type-- jew inti

1424
01:01:09,620 --> 01:01:11,580
hit Kmand-P jew Control-P
u l-istampar xi ħaġa,

1425
01:01:11,580 --> 01:01:13,380
huwa istampar waqt li int tkompli ittajpjar.

1426
01:01:13,380 --> 01:01:16,680
Programmi llum jistgħu tabilħaqq jagħmlu multipli
affarijiet f'daqqa, eżatt bħal fil Scratch

1427
01:01:16,680 --> 01:01:17,180
hawn.

1428
01:01:17,180 --> 01:01:20,400
>> So here, għandi żewġ sprites
issa, għasfur u qattus.

1429
01:01:20,400 --> 01:01:22,780
U jekk jien ikklikkja fuq kull wieħed
dawk karattri wieħed fi żmien,

1430
01:01:22,780 --> 01:01:25,590
Nara dritt issa l-tal-għasafar
skripts fuq kantuniera.

1431
01:01:25,590 --> 01:01:27,270
Issa nara l tal-qattus.

1432
01:01:27,270 --> 01:01:28,540
Għasfur, s qattus.

1433
01:01:28,540 --> 01:01:30,270
Allura kull wieħed minnhom għandhom iskrittura tagħhom stess.

1434
01:01:30,270 --> 01:01:32,700
Imma avviż, liema biċċa puzzle
do huma tnejn tibda bil?

1435
01:01:32,700 --> 01:01:34,260
Meta bandiera aħdar għafast.

1436
01:01:34,260 --> 01:01:36,890
U għasafar, meta bandiera aħdar għafast.

1437
01:01:36,890 --> 01:01:40,870
Allura meta I ikklikkja l-bandiera aħdar,
dawn iż-żewġ skripts jew programmi

1438
01:01:40,870 --> 01:01:42,759
ser jimxu b'mod parallel.

1439
01:01:42,759 --> 01:01:45,800
U inti ser ikollok avviż li l-għasafar hija
biss mindlessly bouncing off-tarf.

1440
01:01:45,800 --> 01:01:50,890
Il-qattus b'mod ċar ġie pprogrammat
b'vantaġġ strateġiku.

1441
01:01:50,890 --> 01:01:52,704
And--

1442
01:01:52,704 --> 01:01:53,490
>> [Roar]

1443
01:01:53,490 --> 01:01:53,821

1444
01:01:53,821 --> 01:01:54,320
Kull dritt.

1445
01:01:54,320 --> 01:01:57,340
Allura l-qattus maqbuda l-għasfur f'dan il-każ.

1446
01:01:57,340 --> 01:01:58,390
Għaliex huwa li?

1447
01:01:58,390 --> 01:02:03,310
Ukoll, l-avviż l-ewwel aħna biss għandhom
l-għasafar biss mindlessly jmorru

1448
01:02:03,310 --> 01:02:05,120
għal dan il-post inizjali,
u mbagħad għal dejjem,

1449
01:02:05,120 --> 01:02:06,774
jekk ma jmissux il-qattus, biss jiċċaqalqu.

1450
01:02:06,774 --> 01:02:08,190
U jekk int fuq it-tarf, bounce.

1451
01:02:08,190 --> 01:02:08,870
U biss jiċċaqalqu.

1452
01:02:08,870 --> 01:02:10,286
U jekk int fuq it-tarf, bounce.

1453
01:02:10,286 --> 01:02:12,840
Iżda l-qattus, sadanittant,
għandha xi loġika addizzjonali

1454
01:02:12,840 --> 01:02:18,250
li tgħid this-- ewwel, biss hekk
li dan mhux kollox preġudikata

1455
01:02:18,250 --> 01:02:21,191
kontra l-għasafar, avviż li stajt
użat biċċa puzzle aħdar hemmhekk

1456
01:02:21,191 --> 01:02:22,690
li attwalment fisien numru bl-addoċċ.

1457
01:02:22,690 --> 01:02:26,179
Karatteristika ta 'ħafna lingwi huwa li jagħti
inti numri bl-addoċċ jew pseudorandom.

1458
01:02:26,179 --> 01:02:29,220
Allura f'dan il-każ, il-qattus fil-bidu
jagħżel numru bl-addoċċ bejn, simili,

1459
01:02:29,220 --> 01:02:31,727
90 gradi u 180
gradi, essenzjalment, hekk

1460
01:02:31,727 --> 01:02:33,310
li hemm xi ftit ta 'varjanza.

1461
01:02:33,310 --> 01:02:37,000
U mbagħad għal dejjem, jekk jmissu
l-għasafar, jilagħbu l-ħoss iljun.

1462
01:02:37,000 --> 01:02:38,754
Inkella, biss il-punt lejn l-għasafar.

1463
01:02:38,754 --> 01:02:39,670
Punt lejn l-għasafar.

1464
01:02:39,670 --> 01:02:44,199
Punt lejn l-għasfur, li hija
biċċa puzzle unto innifsu f'din il-kawża.

1465
01:02:44,199 --> 01:02:45,740
Ukoll, nistgħu nagħmlu ħaġa waħda oħra hawn.

1466
01:02:45,740 --> 01:02:49,820
Let me tiftaħ il-programm avvenimenti hawn.

1467
01:02:49,820 --> 01:02:53,520
U hawn aħna napprovaw żewġ sprites,
li look like dawn iż-żewġ puppets hawn.

1468
01:02:53,520 --> 01:02:55,710
U x'hemm interessanti hawn hija din.

1469
01:02:55,710 --> 01:02:59,140
Il Guy oranġjo għandha dan
sett ta 'biċċiet puzzle hawn.

1470
01:02:59,140 --> 01:03:01,700
Forever jagħmlu l-following--
jekk il-bar-ispazju hija ppressata,

1471
01:03:01,700 --> 01:03:05,430
imbagħad jgħidu, Marco, u
imbagħad xxandar avveniment.

1472
01:03:05,430 --> 01:03:09,460
U sadanittant, il-Guy blu hawn għandha
this-- meta inti tirċievi l-avveniment,

1473
01:03:09,460 --> 01:03:10,540
jgħidu Polo.

1474
01:03:10,540 --> 01:03:12,850
Għalhekk jirriżulta li fil Scratch
u f'lingwi oħrajn,

1475
01:03:12,850 --> 01:03:15,830
hemm modi għal żewġ programmi
jew żewġ skripts, f'dan il-każ,

1476
01:03:15,830 --> 01:03:20,310
li intercommunicate b'tali mod li meta I
laqat il-bar-ispazju, huwa jgħid Marco.

1477
01:03:20,310 --> 01:03:23,539
U l-ieħor jisma li, hekk li
jitkellmu, u jgħid Polo fir-rispons.

1478
01:03:23,539 --> 01:03:26,080
Allura inti tista 'tikteb programmi li
attwalment jinteraġixxu b'dan il-mod.

1479
01:03:26,080 --> 01:03:28,630
U jekk jien tagħmel dan wieħed minflok,
I jistgħu saħansitra żżid varjabbli,

1480
01:03:28,630 --> 01:03:31,287
biss bl-użu Sprite wieħed f'dan il-każ.

1481
01:03:31,287 --> 01:03:32,578
Dan wieħed huwa speċjalment annoying.

1482
01:03:32,578 --> 01:03:36,174
>> [SIĠILL Barking]

1483
01:03:36,174 --> 01:03:37,100

1484
01:03:37,100 --> 01:03:42,490
>> Issa, avviż dwar id-dritt konna ltqajna
xi loġika addizzjonali minn hawn.

1485
01:03:42,490 --> 01:03:45,146
Kif nista 'twaqqaf dan siġill mill Barking?

1486
01:03:45,146 --> 01:03:48,320
>> [SIĠILL Barking]

1487
01:03:48,320 --> 01:03:52,830

1488
01:03:52,830 --> 01:03:55,630
>> Jidher qisu fuq il-lemin
ġenb huwa x'hemm playing ħoss.

1489
01:03:55,630 --> 01:03:58,500
Iżda huwa biss playing a
ħoss jekk dak li hu veru?

1490
01:03:58,500 --> 01:04:03,390
Jekk oranġjo variable--
block-- siekta huwa żero.

1491
01:04:03,390 --> 01:04:07,916
Kif nista 'bidla siekta li tkun l-1,
tifsira vera, jagħmlu din siekta?

1492
01:04:07,916 --> 01:04:12,455
Apparentement, l-iskrittura l-oħra, nista
laqat il-bar-ispazju, u issa hu waqfiet.

1493
01:04:12,455 --> 01:04:15,080
Allura nistgħu jkollhom dan intercommunication
madwar skripts, kif ukoll,

1494
01:04:15,080 --> 01:04:18,349
bi ftit jaqsmu varjabbli
madwar it-tnejn bħal dan.

1495
01:04:18,349 --> 01:04:19,890
Issa, dan mhux kollox li interessanti.

1496
01:04:19,890 --> 01:04:24,360
Ejja imorru quddiem u tagħmel dan u jikkombinaw
ħafna ta 'dawn l-ideat ma' dan il-programm

1497
01:04:24,360 --> 01:04:25,940
hawn.

1498
01:04:25,940 --> 01:04:28,100
Qabel nagħmlu dan, għalkemm,
kif madwar voluntier wieħed?

1499
01:04:28,100 --> 01:04:30,558
Let me jieħdu l-pressjoni off
ta 'lili minħabba I ma attwalment

1500
01:04:30,558 --> 01:04:31,280
jilagħbu din il-logħba.

1501
01:04:31,280 --> 01:04:33,030
Ejja jkollhom xi ħadd we
ma bbenefikawx qabel.

1502
01:04:33,030 --> 01:04:36,420
Int għandek tkun komda ġejjin
up fuq il-palk hawn, fuq camera.

1503
01:04:36,420 --> 01:04:37,430
OK, come fuq up.

1504
01:04:37,430 --> 01:04:38,130
ħafna brave.

1505
01:04:38,130 --> 01:04:39,052
X'hemm isem tiegħek?

1506
01:04:39,052 --> 01:04:39,962
>> Idris: Idris.

1507
01:04:39,962 --> 01:04:40,753
DAVID Malan: Jiddispjacini?

1508
01:04:40,753 --> 01:04:41,196
Idris: Idris.

1509
01:04:41,196 --> 01:04:42,670
DAVID Malan: Idris, sbieħ li jissodisfaw inti.

1510
01:04:42,670 --> 01:04:43,170
Come fuq up.

1511
01:04:43,170 --> 01:04:45,630
U issa, fuq il-mowbajl tiegħek stess
telefon, do you play Pokémon GO?

1512
01:04:45,630 --> 01:04:46,567
>> Idris: Le

1513
01:04:46,567 --> 01:04:47,400
DAVID Malan: Verament?

1514
01:04:47,400 --> 01:04:48,104
Idris: Yeah.

1515
01:04:48,104 --> 01:04:48,770
DAVID Malan: OK.

1516
01:04:48,770 --> 01:04:49,020
Kull dritt.

1517
01:04:49,020 --> 01:04:49,978
Ukoll, sbieħ li jissodisfaw inti.

1518
01:04:49,978 --> 01:04:50,820
Come fuq matul.

1519
01:04:50,820 --> 01:04:51,950
Jien ma lanqas.

1520
01:04:51,950 --> 01:04:55,380
Allura aħna ser insemmu flimkien kif
jilagħbu din, li xi ħadd fil-fatt

1521
01:04:55,380 --> 01:05:00,140
marru u implimentati Scratch
billi tinbidel il-qattus li essenzjalment

1522
01:05:00,140 --> 01:05:02,260
karattri differenti kollha flimkien.

1523
01:05:02,260 --> 01:05:04,870
U jekk jien fullscreen
dan il hawn, aħna qed tmur

1524
01:05:04,870 --> 01:05:06,860
biex tara l-logħba li jmiss flimkien.

1525
01:05:06,860 --> 01:05:09,560
Still tagħbija, xorta tagħbija.

1526
01:05:09,560 --> 01:05:10,270
Ejja.

1527
01:05:10,270 --> 01:05:12,590
Let me jagħmlu dan.

1528
01:05:12,590 --> 01:05:14,520
Ejja.

1529
01:05:14,520 --> 01:05:17,200
Din il-logħba hija tant kbira li ġġarraf.

1530
01:05:17,200 --> 01:05:18,980
Stand by.

1531
01:05:18,980 --> 01:05:22,390
Ipprova dan darba aktar.

1532
01:05:22,390 --> 01:05:23,710
Ejja.

1533
01:05:23,710 --> 01:05:24,211
Kull dritt.

1534
01:05:24,211 --> 01:05:26,840

1535
01:05:26,840 --> 01:05:27,430
>> Hemm immorru.

1536
01:05:27,430 --> 01:05:27,929
KOLLOX SEW.

1537
01:05:27,929 --> 01:05:29,330
bandiera aħdar.

1538
01:05:29,330 --> 01:05:30,190
Allura here we go.

1539
01:05:30,190 --> 01:05:30,950
>> [Ddoqq il-mużika]

1540
01:05:30,950 --> 01:05:32,510
>> Agħżel il-livell tan-nofs hawn.

1541
01:05:32,510 --> 01:05:34,200
Ikklikkja l-Guy blu hemmhekk.

1542
01:05:34,200 --> 01:05:34,700
Kull dritt.

1543
01:05:34,700 --> 01:05:37,860
U inti tista 'tuża l-vleġġa
keys-- up, down, xellug, lemin.

1544
01:05:37,860 --> 01:05:42,150
Issa, ejja jikkunsidraw kif nagħmlu this--
u mbagħad mur wara l-karattru hemmhekk.

1545
01:05:42,150 --> 01:05:42,650
Yep.

1546
01:05:42,650 --> 01:05:45,786
U issa ikklikkja lilu bil-maws.

1547
01:05:45,786 --> 01:05:46,693
Oh, yeah.

1548
01:05:46,693 --> 01:05:47,193
Nimxu.

1549
01:05:47,193 --> 01:05:47,662
Fejn hi l-vleġġa?

1550
01:05:47,662 --> 01:05:48,131
Hawnhekk inti tmur.

1551
01:05:48,131 --> 01:05:48,600
Allura ikklikkja fuq hemmhekk.

1552
01:05:48,600 --> 01:05:48,840
Yeah.

1553
01:05:48,840 --> 01:05:49,340
Kull dritt.

1554
01:05:49,340 --> 01:05:56,008
Allura issa, jien qallek jkollhom ballun poke,
li jekk ikklikkja, hija se tagħmel dan.

1555
01:05:56,008 --> 01:05:57,932
Tajjeb ħafna.

1556
01:05:57,932 --> 01:06:00,390
Fil-prattika għal-lum, jien
misjuba din il-verżjoni tal-logħba

1557
01:06:00,390 --> 01:06:01,760
fil-fatt ma tantx iebsa.

1558
01:06:01,760 --> 01:06:07,650
Mela jekk inti tixtieq li tmur għal darb'oħra hawn,
jimxu għal dan il-ballun poke.

1559
01:06:07,650 --> 01:06:08,780
U mbagħad mur tieħu dritt.

1560
01:06:08,780 --> 01:06:11,200
Ipprova tikklikkja fuqha.

1561
01:06:11,200 --> 01:06:13,120
Oh, fil-fatt, li l-
-maħżen, apparentement.

1562
01:06:13,120 --> 01:06:14,170
OK hekk tagħlaq dik.

1563
01:06:14,170 --> 01:06:15,150
Qatt għamlu dan qabel.

1564
01:06:15,150 --> 01:06:16,566
Forsi jitla 'għal dan il-ħaġa hawn.

1565
01:06:16,566 --> 01:06:17,460
Oh, hemm inti tmur.

1566
01:06:17,460 --> 01:06:18,910
Stenna, hemm waħda hemmhekk.

1567
01:06:18,910 --> 01:06:20,412
Oh, hemm ieħor.

1568
01:06:20,412 --> 01:06:21,285
KOLLOX SEW.

1569
01:06:21,285 --> 01:06:21,785
Down.

1570
01:06:21,785 --> 01:06:23,210
Yeah, ikklikkja.

1571
01:06:23,210 --> 01:06:24,635
>> OK, dan huwa ħafna ħelu.

1572
01:06:24,635 --> 01:06:27,485

1573
01:06:27,485 --> 01:06:28,810
OK, isir tajjeb ħafna.

1574
01:06:28,810 --> 01:06:30,010
Din il-logħba hija mhux iebes ħafna.

1575
01:06:30,010 --> 01:06:30,510
KOLLOX SEW.

1576
01:06:30,510 --> 01:06:32,150
Prosit.

1577
01:06:32,150 --> 01:06:34,720
Hawnhekk, aħna għandna CS50
istress ballun għalik.

1578
01:06:34,720 --> 01:06:37,680
Iżda jikkunsidraw għal ftit mument dak
xi wħud mill-takeaways qegħdin hemm.

1579
01:06:37,680 --> 01:06:39,263
Aktar faċli milli l-logħba reali, apparentament.

1580
01:06:39,263 --> 01:06:41,809
Imma kollha għandna għaddejjin
hawn fuq huwa karattru

1581
01:06:41,809 --> 01:06:44,100
li probabbilment għandha xi tip
ta loop assoċjati magħha.

1582
01:06:44,100 --> 01:06:44,590
Mhuwiex qattus.

1583
01:06:44,590 --> 01:06:45,860
Huwa dan il-karattru minflok.

1584
01:06:45,860 --> 01:06:49,052
U dan loop huwa biss kontinwament
qal, jekk up arrow ippressat,

1585
01:06:49,052 --> 01:06:51,260
jekk vleġġa isfel ippressat, jekk
vleġġa xellug ippressat jew xellug

1586
01:06:51,260 --> 01:06:53,960
vleġġa ippressat, ningranaw
jew 'l isfel jew xellug jew dritt.

1587
01:06:53,960 --> 01:06:57,870
Jew jekk hemm ieħor biċċa puzzle hemm
li tgħid meta jmissu Sprite ieħor,

1588
01:06:57,870 --> 01:07:01,320
meta tmiss wieħed mill-karattri
għall-boċċa poke, jekk jmissu,

1589
01:07:01,320 --> 01:07:02,440
allura tagħmel dan.

1590
01:07:02,440 --> 01:07:04,800
>> Allura kollha ta 'l-ideat konna
qegħdin jużaw s'issa verament

1591
01:07:04,800 --> 01:07:09,130
tista 'sempliċement tiġi applikata f'dan il partikulari
kuntest li jilagħbu din il-logħba, kif ukoll.

1592
01:07:09,130 --> 01:07:13,580
Let me imorru quddiem u iġbed
sa ieħor hawn, fil-fatt.

1593
01:07:13,580 --> 01:07:17,060
Let me imorru quddiem u iġbed
up, ejja ngħidu, dan.

1594
01:07:17,060 --> 01:07:18,540
Din hija xi ħaġa li aħna remixed.

1595
01:07:18,540 --> 01:07:20,329
Magħmula minn wieħed mill tagħna
istudenti fl-Cambridge,

1596
01:07:20,329 --> 01:07:23,370
u mbagħad I marru permezz u mibdula
pretty ħafna kull każ ta 'Harvard

1597
01:07:23,370 --> 01:07:25,580
Yale dan iż-żmien.

1598
01:07:25,580 --> 01:07:27,870
Kieku xi ħadd tixtieq
jikkompetu kontra l ivies

1599
01:07:27,870 --> 01:07:31,650
hawn fi akkumulazzjoni ieħor
ta 'kollha ta' dawn l-ideat?

1600
01:07:31,650 --> 01:07:32,662
Come fuq l isfel, iva.

1601
01:07:32,662 --> 01:07:33,370
X'hemm isem tiegħek?

1602
01:07:33,370 --> 01:07:34,190
>> Dina: Dina.

1603
01:07:34,190 --> 01:07:35,015
>> DAVID Malan: Adina?

1604
01:07:35,015 --> 01:07:35,380
>> Dina: Dina.

1605
01:07:35,380 --> 01:07:36,410
>> DAVID Malan: Dina, come fuq l isfel.

1606
01:07:36,410 --> 01:07:37,320
Kull dritt, Dina.

1607
01:07:37,320 --> 01:07:40,780
Allura din il-logħba gets diffiċli u
aktar diffiċli, minħabba li f'dan il-logħba,

1608
01:07:40,780 --> 01:07:43,970
hemm fatturi varjabbli qed jintużaw kif ukoll
li huma kontinwament iżżomm rekord

1609
01:07:43,970 --> 01:07:45,930
ta liema livell inti fil-logħba.

1610
01:07:45,930 --> 01:07:47,120
Allura sbieħ li jissodisfaw inti.

1611
01:07:47,120 --> 01:07:48,250
Come madwar hawn.

1612
01:07:48,250 --> 01:07:51,460
U għalhekk l-għan hawnhekk huwa li sort
tal tagħmel mod tiegħek permezz labirint

1613
01:07:51,460 --> 01:07:52,710
li dan l-istudent implimentati.

1614
01:07:52,710 --> 01:07:55,334
>> U biss li tiffissa l-istadju, kull
ta 'dawn l-istampi fuq l-iskrin

1615
01:07:55,334 --> 01:07:57,222
huwa Sprite tagħha stess, karattru tagħha stess.

1616
01:07:57,222 --> 01:07:59,680
Allura dawn kienu mill-qtates default,
iżda l-istudent nbidlet fuqhom

1617
01:07:59,680 --> 01:08:01,480
għad-diversi logos ivies hawn.

1618
01:08:01,480 --> 01:08:04,370
U allura inti ser tara li biss
bl-użu kundizzjonijiet u loops

1619
01:08:04,370 --> 01:08:06,848
u l-funzjonijiet u aktar, ikollok dan.

1620
01:08:06,848 --> 01:08:07,478
>> [Ddoqq il-mużika]

1621
01:08:07,478 --> 01:08:09,228
[MUSIC - MC martell, "U KA Tmissx
 DIN "]

1622
01:08:09,228 --> 01:08:13,060

1623
01:08:13,060 --> 01:08:14,018
>> Yeah, OK.

1624
01:08:14,018 --> 01:08:17,371

1625
01:08:17,371 --> 01:08:20,110
Yeah, iżommu għaddejjin.

1626
01:08:20,110 --> 01:08:21,180
Ewwel livell ta faċli ħafna.

1627
01:08:21,180 --> 01:08:22,554
You ħadthom biss ltqajna biex imorru hemmhekk.

1628
01:08:22,554 --> 01:08:25,644
Iżda għal darb'oħra, jikkunsidraw, din hija biss
loop jisimgħu għall-vleġġa keys--

1629
01:08:25,644 --> 01:08:26,560
up, down, xellug, lemin.

1630
01:08:26,560 --> 01:08:28,320
U issa blokk sensing.

1631
01:08:28,320 --> 01:08:29,345
Sbieħ ħafna.

1632
01:08:29,345 --> 01:08:32,600
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1633
01:08:32,600 --> 01:08:40,340

1634
01:08:40,340 --> 01:08:41,288
>> Sbieħ ħafna.

1635
01:08:41,288 --> 01:08:44,550
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1636
01:08:44,550 --> 01:08:55,540

1637
01:08:55,540 --> 01:08:56,430
>> Sbieħ ħafna.

1638
01:08:56,430 --> 01:08:57,975
Pjuttost faċli, Crimson.

1639
01:08:57,975 --> 01:08:59,060
Kull dritt.

1640
01:08:59,060 --> 01:09:00,250
Levels-- UH-oh.

1641
01:09:00,250 --> 01:09:02,380
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1642
01:09:02,380 --> 01:09:04,980

1643
01:09:04,980 --> 01:09:07,150
>> U għal darb'oħra, f'dawn
tliet crests Harvard,

1644
01:09:07,150 --> 01:09:10,334
inti biss għandek loġika
qal jekk fit-tarf, bounce.

1645
01:09:10,334 --> 01:09:13,238
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1646
01:09:13,238 --> 01:09:14,690

1647
01:09:14,690 --> 01:09:17,651
>> OK, dak li qed isir hu
aktar interessanti minn għaliex.

1648
01:09:17,651 --> 01:09:18,150
Sbieħ ħafna.

1649
01:09:18,150 --> 01:09:18,810
Sbieħ ħafna.

1650
01:09:18,810 --> 01:09:20,270
Uh-oh.

1651
01:09:20,270 --> 01:09:23,350
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1652
01:09:23,350 --> 01:09:26,005

1653
01:09:26,005 --> 01:09:27,630
Naħseb li inti għandek sagrifiċċju lilek innifsek.

1654
01:09:27,630 --> 01:09:30,372
[MUSIC - MC martell, "U KA Tmissx
 DIN "]

1655
01:09:30,372 --> 01:09:30,872
Quick!

1656
01:09:30,872 --> 01:09:34,848

1657
01:09:34,848 --> 01:09:38,824
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1658
01:09:38,824 --> 01:09:44,288

1659
01:09:44,288 --> 01:09:44,788
Nizza.

1660
01:09:44,788 --> 01:09:52,240

1661
01:09:52,240 --> 01:09:52,740
Kollox sew.

1662
01:09:52,740 --> 01:09:53,770
Int ser ġġibu.

1663
01:09:53,770 --> 01:09:56,304
Iva, iva!

1664
01:09:56,304 --> 01:09:58,256
Sbieħ ħafna.

1665
01:09:58,256 --> 01:10:01,184
>> [Cheering]

1666
01:10:01,184 --> 01:10:02,160

1667
01:10:02,160 --> 01:10:05,576
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1668
01:10:05,576 --> 01:10:09,480

1669
01:10:09,480 --> 01:10:10,940
>> Nizza!

1670
01:10:10,940 --> 01:10:14,370
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1671
01:10:14,370 --> 01:10:39,050

1672
01:10:39,050 --> 01:10:39,550
Ltqajna.

1673
01:10:39,550 --> 01:10:41,510
Ejja!

1674
01:10:41,510 --> 01:10:43,470
It-tieni għal-livell l-aħħar.

1675
01:10:43,470 --> 01:10:46,900
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1676
01:10:46,900 --> 01:10:49,588

1677
01:10:49,588 --> 01:10:50,580
>> Kull dritt.

1678
01:10:50,580 --> 01:10:54,052
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1679
01:10:54,052 --> 01:11:00,992

1680
01:11:00,992 --> 01:11:01,492
Iva.

1681
01:11:01,492 --> 01:11:06,230

1682
01:11:06,230 --> 01:11:08,020
użu tajjeb ta 'varjabbli hawn.

1683
01:11:08,020 --> 01:11:09,770
[MUSIC - MC martell, "U KA Tmissx
 DIN "]

1684
01:11:09,770 --> 01:11:10,770
Iva.

1685
01:11:10,770 --> 01:11:14,743
[MUSIC - MC martell, "U KA Tmissx
 DIN "]

1686
01:11:14,743 --> 01:11:16,707

1687
01:11:16,707 --> 01:11:17,689
Nizza.

1688
01:11:17,689 --> 01:11:21,126
[MUSIC - MC martell, "U KA Tmissx
 DIN "]

1689
01:11:21,126 --> 01:11:23,581

1690
01:11:23,581 --> 01:11:24,570
Orrajt.

1691
01:11:24,570 --> 01:11:25,770
Aħna ltqajna biex tikseb sa l-aħħar.

1692
01:11:25,770 --> 01:11:26,270
Hemmhekk.

1693
01:11:26,270 --> 01:11:27,010
Oh!

1694
01:11:27,010 --> 01:11:29,980
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1695
01:11:29,980 --> 01:11:32,160

1696
01:11:32,160 --> 01:11:34,866
>> Jista 'jmur tard illum, imma
huwa gonna tkun worth it.

1697
01:11:34,866 --> 01:11:38,200
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1698
01:11:38,200 --> 01:11:39,640

1699
01:11:39,640 --> 01:11:42,520
>> Tista 'tagħmel dan!

1700
01:11:42,520 --> 01:11:43,480
Yeah!

1701
01:11:43,480 --> 01:11:46,278
>> [Cheering]

1702
01:11:46,278 --> 01:11:47,230

1703
01:11:47,230 --> 01:11:50,086
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1704
01:11:50,086 --> 01:11:51,470
>> Dan wieħed verament diffiċli.

1705
01:11:51,470 --> 01:11:54,070
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1706
01:11:54,070 --> 01:11:57,458

1707
01:11:57,458 --> 01:11:59,000
>> Aħna ser jagħtuk żewġ ħajjiet aktar.

1708
01:11:59,000 --> 01:11:59,968
inti tista 'tagħmel dan?

1709
01:11:59,968 --> 01:12:03,356
>> [MUSIC - MC martell, "U KA Tmissx
 DIN "]

1710
01:12:03,356 --> 01:12:06,744

1711
01:12:06,744 --> 01:12:07,244
>> Kull dritt.

1712
01:12:07,244 --> 01:12:09,160
Kif dwar rawnd kbir
ta applause xorta.

1713
01:12:09,160 --> 01:12:10,800
Idea li t-tieni għal-livell l-aħħar.

1714
01:12:10,800 --> 01:12:11,723
Grazzi.

1715
01:12:11,723 --> 01:12:14,964
>> [Applause]

1716
01:12:14,964 --> 01:12:15,890

1717
01:12:15,890 --> 01:12:19,600
>> Allura dan huwa biss li jgħidu kemm inti
tista 'tagħmel ma' dawn it-tipi ta 'affarijiet.

1718
01:12:19,600 --> 01:12:21,892
U tirrealizza wkoll li meta
biċċiet puzzle ma exist--

1719
01:12:21,892 --> 01:12:24,891
u fil-fatt, dan se jkun wieħed
tas-setgħat bl-ewwel problema

1720
01:12:24,891 --> 01:12:27,080
settijiet u beyond-- huwa li
fil-fatt joħolqu tiegħek.

1721
01:12:27,080 --> 01:12:28,860
U dan huwa biss snippet
ta 'wieħed mill-eżempji

1722
01:12:28,860 --> 01:12:30,230
inti ser tkun tista 'tilgħab
ma online, fejn

1723
01:12:30,230 --> 01:12:33,380
jekk inti ma bnew fil Scratch
xi ħaġa bħal biċċa puzzle sogħla,

1724
01:12:33,380 --> 01:12:35,470
inti tista 'tagħmel attwalment it yourself.

1725
01:12:35,470 --> 01:12:37,387
>> U hekk dan kollu u aktar Jistenna.

1726
01:12:37,387 --> 01:12:39,470
U biss żebgħa finali
stampa ta 'tabilħaqq x'inhu

1727
01:12:39,470 --> 01:12:43,120
quddiem fil-maħżen għall-klassi għalik,
ibbażata fuq xi ritratti mill-klassi

1728
01:12:43,120 --> 01:12:46,970
passat, ippermettuli dim-dwal
aħħar darba u jurik CS50.

1729
01:12:46,970 --> 01:12:49,580

1730
01:12:49,580 --> 01:12:53,038
>> [Ddoqq il-mużika]

1731
01:12:53,038 --> 01:14:38,210

1732
01:14:38,210 --> 01:14:38,860
>> Kull dritt.

1733
01:14:38,860 --> 01:14:41,540
Li lilha għall CS50.

1734
01:14:41,540 --> 01:14:44,964
Kejk issa hija servuta.

1735
01:14:44,964 --> 01:14:50,610

1736
01:14:50,610 --> 01:14:53,960
>> [Ddoqq il-mużika]

1737
01:14:53,960 --> 01:15:07,624