1
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2
00:00:01,390 --> 00:00:04,890
>> [Daqq ta mużika]

3
00:00:04,890 --> 00:00:10,955

4
00:00:10,955 --> 00:00:12,580
DAVID J Malan: Kull dritt, welcome lura.

5
00:00:12,580 --> 00:00:13,600
Dan huwa CS50.

6
00:00:13,600 --> 00:00:15,540
Dan huwa l-aħħar ta 'ġimgħa seba.

7
00:00:15,540 --> 00:00:18,180
U huwa l-aħħar ta 'dak kennies
kaċċa minn problema stabbiliti erba

8
00:00:18,180 --> 00:00:19,220
li inti tista 'recall.

9
00:00:19,220 --> 00:00:21,650
Wara tirkupra kollha ta '
dawk JPEGs tal-persunal,

10
00:00:21,650 --> 00:00:24,820
inti ġew sfidati, jekk inti tixtieq,
li r-ritratt ruħek ma kif ħafna

11
00:00:24,820 --> 00:00:25,981
ta 'dawk folks kemm tista'.

12
00:00:25,981 --> 00:00:28,480
Aħna ltqajna mazz sħiħ ta 'sottomissjonijiet
matul l-aħħar ftit ġimgħat,

13
00:00:28,480 --> 00:00:32,980
tabilħaqq, pjuttost dritt ftit qabel nofsinhar
illum, li wħud minnhom huma dawk hawn,

14
00:00:32,980 --> 00:00:37,670
maqbuda hawn in-- jistenna like-- Annenberg
Hall fil ħinijiet tal-uffiċċju, wieħed hawn

15
00:00:37,670 --> 00:00:39,530
fil Lowell Kamra ma Nick.

16
00:00:39,530 --> 00:00:41,750
Hawn Ramon jinqabdu fuq it-telefon.

17
00:00:41,750 --> 00:00:43,870
Dan kien fi ikla CS50.

18
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Dan kien Jason Skyping ma
classmate aktar kreattivi,

19
00:00:46,840 --> 00:00:48,280
li phoned lilu b'dan il-mod.

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Ma nafux liema dan kien.

21
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>> [Rires]

22
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>> DAVID J Malan: Imma
li jiswew gigabyte.

23
00:00:54,570 --> 00:00:56,960
Hawnhekk huwa Chang, li
litteralment dam off-istadju

24
00:00:56,960 --> 00:01:00,480
biex jevitaw li jkunu fotografat wieħed
jum, iżda kien eventwalment maqbuda.

25
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Hawnhekk huwa Nick.

26
00:01:02,050 --> 00:01:03,480
Hawnhekk huwa Nick.

27
00:01:03,480 --> 00:01:04,080
Hawnhekk huwa Nick.

28
00:01:04,080 --> 00:01:05,090

29
00:01:05,090 --> 00:01:07,670
U hawn huwa Alison mill-oqsma.

30
00:01:07,670 --> 00:01:11,840
U Zamyla anki instab
fi kompetizzjoni ballroom.

31
00:01:11,840 --> 00:01:14,100
Allura aħna se jmorru permezz
dawn ir-ritratti, insemmu

32
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li ssottometta l-aktar
l-aktar kmieni, u l-premju

33
00:01:16,690 --> 00:01:20,662
premju wieħed fabulous, kif
imwiegħed fil-spec.

34
00:01:20,662 --> 00:01:23,120
U aħna ser wkoll segwitu dwar
l-ispazju li kien involut.

35
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>> Koppja ta 'announcements-- hekk ikla
huwa, għal darb'oħra, dan Ġimgħa fl 1:15.

36
00:01:26,860 --> 00:01:30,420
Jekk inti tixtieq li jingħaqdu magħna,
RSVP f'dak URL hawn.

37
00:01:30,420 --> 00:01:33,730
Jason jerġa jkun jidher hawn minn wieħed
tas-sezzjonijiet ftit ta 'snin

38
00:01:33,730 --> 00:01:35,510
lura, li ġara
li jaqa 'fuq Halloween.

39
00:01:35,510 --> 00:01:38,950
U fil-fatt, huwa dressed bħala
qara dik is-sena partikolari.

40
00:01:38,950 --> 00:01:42,700
Jekk inti tara din it-taqsima
tal mit-taqsima tiegħu 2011

41
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tmienja, jekk inti kurjużi,
fil CS50.tv, I think

42
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din kienet is-sena li fiha
arja tal-pompa tiegħu kien jaħdem.

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>> Jekk inti mbagħad tara l-
taqsima simili fl-2012,

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00:01:52,490 --> 00:01:55,620
tkun taf tara dan Jason ħafna iddeflazzjonat,
peress li l-libsa m'għadux servew,

45
00:01:55,620 --> 00:01:58,060
li huwa biss li jgħidu
nhar il-Ġimgħa, jekk youd

46
00:01:58,060 --> 00:02:02,720
simili carve qara ma Daven
u Gabe u oħrajn, RSVP lill-kapijiet

47
00:02:02,720 --> 00:02:04,480
fl-indirizz cs50.harvard.edu.

48
00:02:04,480 --> 00:02:06,200
Li jipprometti li jkun gost kbir.

49
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Daven, aħna qed told, minquxin
Pumpkins kollha tal-ħajja tiegħu.

50
00:02:08,660 --> 00:02:11,930
Gabriel mill-Brażil qatt ma
minquxin qara għall Halloween.

51
00:02:11,930 --> 00:02:14,700
Allura jkun hemm magħhom kif jiskopri.

52
00:02:14,700 --> 00:02:16,830
>> Seminars, meanwhile--
sabiex inti ser jitgħallmu malajr

53
00:02:16,830 --> 00:02:20,650
dwar liema aspettattivi tagħna huma għal
il-proġett finali, li essenzjalment

54
00:02:20,650 --> 00:02:23,150
se jsarrafx biss fl
tfassil u l-implimentazzjoni

55
00:02:23,150 --> 00:02:26,440
aktar xi proġett ta 'interess għall-
inti, għalkemm soġġetti għall-approvazzjoni

56
00:02:26,440 --> 00:02:28,490
u gwida minn sħabi tagħlim tiegħek.

57
00:02:28,490 --> 00:02:32,110
Lejn it-tmiem tal-
semestru, aħna jintroduċu numru

58
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ta 'seminars, li huma klassijiet fakultattivi
mmexxija mill-fellows tagħlim u Harvard

59
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persunal, ħbieb tal-kors madwar
kampus, fuq suġġetti varji li

60
00:02:38,570 --> 00:02:41,470
huma tanġenzjali għall-
sillabu sottostanti kors ta

61
00:02:41,470 --> 00:02:45,590
iżda madankollu applikabbli, gost, u
differenti għall-proġetti finali potenzjali.

62
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>> Per eżempju, l-ewwel, jekk inti tixtieq
biex jirreġistraw, ras għal dak URL hemmhekk.

63
00:02:49,530 --> 00:02:53,010
U dan huwa l-lineup għall
seminars din is-sena biss.

64
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Imma tirrealizza għandna għexieren ta '
seminars minn snin imgħoddija, li kollha

65
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huma marbuta fil-menu Seminars
għażla tal-websajt tal-kors tal-.

66
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Mela jekk inti qed jaħsbu dwar
li jmorru lil hinn żona kumdità tiegħek

67
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jew picking up xi ħiliet ġodda,
per eżempju, programmazzjoni iPhone

68
00:03:05,060 --> 00:03:08,100
apps bi Swift, lingwa ġdida
minn Apple jew Oġġettiv-C

69
00:03:08,100 --> 00:03:11,230
jew Android apps jew l-ipprogrammar [? CUÉ?]
bozoz tad-dawl, jew kwalunkwe mis-suġġetti

70
00:03:11,230 --> 00:03:15,490
up hawn u aktar, check dovut
l-paġna ta 'reġistrazzjoni.

71
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>> Allura bdejna u konkluż
It-tnejn ma tħares lejn HTTP.

72
00:03:19,730 --> 00:03:22,675
Allura HTTP refresher-- malajr,
HyperText Trasferiment Protokoll.

73
00:03:22,675 --> 00:03:24,045
Imma dak li verament ma jfisser?

74
00:03:24,045 --> 00:03:26,805

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Dak li verament ma jfisser?

76
00:03:27,930 --> 00:03:30,665

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Huwa li idejn?

78
00:03:31,290 --> 00:03:33,074

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Naf int biss grif ras tiegħek.

80
00:03:34,740 --> 00:03:36,400
Iżda inti tixtieq li tipproponi liema HTTP hu?

81
00:03:36,400 --> 00:03:37,792

82
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>> Udjenza: Kif kompjuters
jikkomunikaw ma [inaudible].

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00:03:40,576 --> 00:03:41,517

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DAVID J Malan: tlift l-aħħar parti.

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Kif il-kompjuters jikkomunikaw with--

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>> Servers Internet: udjenza.

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DAVID J Malan: Good-- mal internet
servers, u speċifikament, servers mill-web.

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Minħabba recall, hemm mazz ta '
servizzi fuq l-internet, li wħud minnhom

89
00:03:53,533 --> 00:03:57,349
tuża probabilment kuljum bejn chat
u l-messaġġ, chat, u l-web, u l-email,

90
00:03:57,349 --> 00:03:57,890
u simili.

91
00:03:57,890 --> 00:04:00,900
U HTTP huwa biss il-
protokoll li web browsers

92
00:04:00,900 --> 00:04:03,750
jitkellmu meta tikkomunika mal
servers mill-web, u viċi versa.

93
00:04:03,750 --> 00:04:05,580
U l-Analog fil-
dinja tal-bniedem jista 'jkun,

94
00:04:05,580 --> 00:04:08,730
I jestendu naħa tiegħi biex ħawwad xi
Oħra tal-bniedem u hu jew hi

95
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jirrikonoxxi billi testendi
tiegħu jew idejn tagħha kif ukoll.

96
00:04:11,970 --> 00:04:13,970
Allura dan huwa biss protokoll,
sett ta 'konvenzjonijiet.

97
00:04:13,970 --> 00:04:15,630
>> U liema tabilħaqq huma dawk il-konvenzjonijiet?

98
00:04:15,630 --> 00:04:18,640
Ukoll, hija biss jeħodna għall
jibgħat messaġġi quddiem u lura,

99
00:04:18,640 --> 00:04:19,770
kif aħna jidhru hawn.

100
00:04:19,770 --> 00:04:22,520
U hemm koppja ta 'modi
li tista 'tibgħat dawn il-messaġġi.

101
00:04:22,520 --> 00:04:24,360
U forsi l-aktar
komuni hija magħrufa bħala get.

102
00:04:24,360 --> 00:04:26,510
U aħna ser tara kuntrast
għal dan qabel twil.

103
00:04:26,510 --> 00:04:30,010
>> Iżda talba tikseb minn browser
għal server biss tidher bħal dan.

104
00:04:30,010 --> 00:04:32,960
Huwa mazz ta 'test li tpoġġi
ġewwa ta 'pakkett virtwali.

105
00:04:32,960 --> 00:04:35,854
Fuq barra ta 'dak pakkett
mur biċċiet koppja ta 'dettalji.

106
00:04:35,854 --> 00:04:37,770
X'hemm bżonn li jmorru fuq il-
pakkett, biex ngħidu hekk,

107
00:04:37,770 --> 00:04:41,820
sabiex tikseb talba bħal
dan mill me għal web server?

108
00:04:41,820 --> 00:04:42,320
Yeah.

109
00:04:42,320 --> 00:04:43,270
>> UDJENZA: Indirizz IP tiegħek.

110
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>> DAVID J Malan: indirizz IP tiegħi
fil-qasam Mill, biex ngħidu hekk,

111
00:04:45,890 --> 00:04:49,490
u ta 'kors, l-
indirizz IP riċevitur.

112
00:04:49,490 --> 00:04:52,710
Iżda fil-każ ta 'pakkett web,
għandna bżonn ftit aktar dettall

113
00:04:52,710 --> 00:04:55,254
Huwa mhux biżżejjed biss biex
ibgħat envelop għal server,

114
00:04:55,254 --> 00:04:57,670
minħabba li server jista 'jkun
jisimgħu għal tipi differenti

115
00:04:57,670 --> 00:04:59,180
ta 'traffiku internet.

116
00:04:59,180 --> 00:05:01,370
Allura x'iktar do we bżonn
minbarra IP tar-riċevitur?

117
00:05:01,370 --> 00:05:02,723

118
00:05:02,723 --> 00:05:03,222
Yeah?

119
00:05:03,222 --> 00:05:04,241
>> UDJENZA: Huwa TCP?

120
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DAVID J Malan: Tajba.

121
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TCP--

122
00:05:06,470 --> 00:05:07,340
>> UDJENZA: Indirizz.

123
00:05:07,340 --> 00:05:09,340
>> DAVID J Malan: Indirizz,
jew port, kif huwa msejjaħ.

124
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Qrib, iżda numru port TCP.

125
00:05:11,010 --> 00:05:12,220
U hemm mazz ta 'dawn.

126
00:05:12,220 --> 00:05:14,310
Iżda b'mod kostanti l-aktar
familjari għandhom eventwalment

127
00:05:14,310 --> 00:05:17,590
jkun ta '80, li huwa l-default
dak użat għat-traffiku tal-web.

128
00:05:17,590 --> 00:05:20,040
U ieħor familjari
wieħed dalwaqt se tkun 443,

129
00:05:20,040 --> 00:05:24,280
li huwa użat għall-web sigur
traffiku, URLs li tibda bil https.

130
00:05:24,280 --> 00:05:26,650
>> Allura dan huwa dak li tmur
ġewwa ta 'dak il-pakkett.

131
00:05:26,650 --> 00:05:29,780
U jiksbu / ifisser biss, jagħtu
lili il-web page default.

132
00:05:29,780 --> 00:05:32,700
Agħtini l-għerq tal-hard
issuq fuq dik web server.

133
00:05:32,700 --> 00:05:36,050
U wieħed jittama, il-web
server se tirrispondi, OK

134
00:05:36,050 --> 00:05:39,630
u n-numru 200, li huwa biss
konvenzjoni tgħid, iva, kollha

135
00:05:39,630 --> 00:05:40,470
huwa tabilħaqq OK.

136
00:05:40,470 --> 00:05:41,680
Hawn il-paġna.

137
00:05:41,680 --> 00:05:45,510
It-tip tal-paġna web se
jkun it-test, iżda b'mod aktar speċifiku, HTML,

138
00:05:45,510 --> 00:05:47,010
li aħna qed madwar biex adsa lura fis.

139
00:05:47,010 --> 00:05:49,877
U l-dot dot dot biss
mezzi, hawnhekk huwa l-HTML.

140
00:05:49,877 --> 00:05:51,710
U li fejn aħna
jittellgħu l-istorja llum,

141
00:05:51,710 --> 00:05:55,740
fatt bil-miktub HTML,
HyperText Markup Language, li

142
00:05:55,740 --> 00:05:57,727
hija l-lingwa li biha
paġni web huma miktuba.

143
00:05:57,727 --> 00:05:59,060
Mhuwiex lingwa ta 'programmar.

144
00:05:59,060 --> 00:06:01,270
M'hemm l-ebda funzjonijiet
jew ħoloq jew kundizzjonijiet.

145
00:06:01,270 --> 00:06:03,800
Huwa lingwa markup,
kif ukoll għal darb'oħra tara llum,

146
00:06:03,800 --> 00:06:07,240
li jippermetti li inti tispeċifika
kif għandhom jistrutturaw u stylize

147
00:06:07,240 --> 00:06:09,300
estetikament web page.

148
00:06:09,300 --> 00:06:11,470
>> Allura dan kien il-wieħed
u biss paġna aħna verament

149
00:06:11,470 --> 00:06:13,930
ħares lejn, jekk fil-qosor, nhar it-Tnejn.

150
00:06:13,930 --> 00:06:16,250
U avviż ftit
Karatteristiċi ewlenin.

151
00:06:16,250 --> 00:06:20,170
Hemm ħafna ta 'open angolata
parentesi u bracket angolata qrib.

152
00:06:20,170 --> 00:06:23,160
Fil bejn dawk angolata
parentesi huma kliem.

153
00:06:23,160 --> 00:06:25,660
U aħna qed tmur biex tibda
ssejjaħ dawn il-kliem tags.

154
00:06:25,660 --> 00:06:28,800
Ras bracket hekk miftuħa
u l-kap bracket magħluqa

155
00:06:28,800 --> 00:06:33,620
huma l-tags miftuħa u magħluqa,
jew il-bidu u tat-tmiem tags

156
00:06:33,620 --> 00:06:37,660
rispettivament, ta 'element HTML,
kif aħna ser sejħa hija, imsejħa ras.

157
00:06:37,660 --> 00:06:41,760
U tapplika l-istess jargon
għall-ġisem fil-HTML u ibqa 'sejjer hekk.

158
00:06:41,760 --> 00:06:43,970
>> U x'hemm sbieħ huwa
HTML-- u tabilħaqq, aħna ser

159
00:06:43,970 --> 00:06:47,187
jqattgħu terriblement ftit ħin fuqha,
għaliex inti ser aktar biss insemmu

160
00:06:47,187 --> 00:06:49,770
liema karatteristiċi għandu meta inti
fil-fatt ikollhom problema konkreta

161
00:06:49,770 --> 00:06:52,820
li solve-- inti ser issib li
browser huwa pretty dumb.

162
00:06:52,820 --> 00:06:56,450
Huwa biss se do-- ma b'differenza
a computer-- dak li inti tgħid li tagħmel.

163
00:06:56,450 --> 00:06:59,279
U hekk meta jkollok miftuħa
HTML parentesi fil-quċċata ħafna

164
00:06:59,279 --> 00:07:01,320
hemm, li essenzjalment
ifisser biss, ħej, browser,

165
00:07:01,320 --> 00:07:04,090
hawn taqa 'paġna web miktub fil HTML.

166
00:07:04,090 --> 00:07:06,130
>> Meta jara bracket miftuħa
ras, li biss ifisser,

167
00:07:06,130 --> 00:07:10,350
ħej, browser, hawnhekk jidħol l-ras, jew
il-porzjon topmost tal-paġna web tiegħi.

168
00:07:10,350 --> 00:07:14,192
Meta jara bracket magħluqa
ras, li biss ifisser, ħej,

169
00:07:14,192 --> 00:07:15,150
thats it għall-ras.

170
00:07:15,150 --> 00:07:16,420
Standby għal xi ħaġa oħra.

171
00:07:16,420 --> 00:07:18,878
U li xi ħaġa oħra huwa
apparentement ser tkun il-korp.

172
00:07:18,878 --> 00:07:22,630
U meta inti ma jkollhomx tikketta, bħall-
int għadek hello, comma, dinja,

173
00:07:22,630 --> 00:07:26,610
li jinsab biss se tkun test nej li
finalment hija murija fil-iskrin.

174
00:07:26,610 --> 00:07:29,220
>> Issa, inti ser ikollok avviż wisq
l-indentazzjoni hawn.

175
00:07:29,220 --> 00:07:32,160
Inti tista 'probabbilment jinferixxu
kif aħna qed stylizing dan.

176
00:07:32,160 --> 00:07:34,850
Kull darba I tiftaħ tag,
biex ngħidu hekk, I inċiż.

177
00:07:34,850 --> 00:07:38,540
U kull darba I qrib
tikketta, I un-inċiż,

178
00:07:38,540 --> 00:07:40,690
simili fl-ispirtu għal ċineg kaboċċi.

179
00:07:40,690 --> 00:07:43,470
U lil hinn minn dak, jien tip
ta 'użu ġudizzju tiegħi.

180
00:07:43,470 --> 00:07:48,380
Avviż li jien ma jolqot laqtu
Ikteb ġewwa ta 'dak lametta tal-titolu.

181
00:07:48,380 --> 00:07:48,990
Għaliex?

182
00:07:48,990 --> 00:07:51,920
Well, I biss iddeċieda li stenna
ftit aktar nodfa lili, il-bniedem,

183
00:07:51,920 --> 00:07:53,181
għal ftit ma jolqot tagħmel dan.

184
00:07:53,181 --> 00:07:54,930
Għalhekk għal darb'oħra, hemm xi
sentenza jitlob biss

185
00:07:54,930 --> 00:07:57,670
bħal hemm fis-C jew kwalunkwe lingwa.

186
00:07:57,670 --> 00:08:04,110
>> Iżda tinnota wkoll li din indentazzjoni
jippresta ruħu għal mudell mentali,

187
00:08:04,110 --> 00:08:05,670
ma tgħabbix iżżejjed jikkumplikaw dan.

188
00:08:05,670 --> 00:08:07,020
Iżda siġra, id-dritt?

189
00:08:07,020 --> 00:08:09,290
Jekk taħseb ta 'web
paġna, apparentement bil-miktub

190
00:08:09,290 --> 00:08:12,050
bħal dan, bħala
nicely inċiża li mod,

191
00:08:12,050 --> 00:08:17,390
inti tista 'kważi think tal-kategorija miftuħa
HTML tag bracket magħluqa demarkazzjoni

192
00:08:17,390 --> 00:08:21,380
l-għerq ta 'node, siġra tal-familja
node stil fl-istil tas-siġar

193
00:08:21,380 --> 00:08:22,900
ħarisna lejn Ġimgħa li għadda.

194
00:08:22,900 --> 00:08:27,630
>> U fil-fatt, aħna għandna fuq il-lemin hawn
dak li aħna ser sejħa DOM, D-O-M, dokument

195
00:08:27,630 --> 00:08:31,680
mudell oġġett, mod fancy ta 'tgħid
siġra li tirrappreżenta dak HTML.

196
00:08:31,680 --> 00:08:36,140
U tinnota li HTML għandha, aħna ser ngħidu,
bħal siġra tal-familja, żewġt itfal.

197
00:08:36,140 --> 00:08:37,659
Fuq ix-xellug huwa l-kap.

198
00:08:37,659 --> 00:08:39,179
Dwar id-dritt huwa l-korp.

199
00:08:39,179 --> 00:08:44,220
>> U biss bħala eżerċizzju ħsieb mindless,
ras, naturalment, għandha kemm ħafna tfal

200
00:08:44,220 --> 00:08:46,070
skond din l-istruttura?

201
00:08:46,070 --> 00:08:48,200
Allura wieħed biss, title--
u hu għalhekk li għandna

202
00:08:48,200 --> 00:08:50,580
il-vleġġa jmorru minn ras għat-titolu.

203
00:08:50,580 --> 00:08:55,110
Allura huwa bħallikieku dik il-persuna fil-
siġra tal-familja kellhom wieħed biss frieħ.

204
00:08:55,110 --> 00:08:58,230
U mbagħad titolu innifsu jista
jingħad li jkollhom tfal wisq.

205
00:08:58,230 --> 00:09:01,780
>> Ifakkar li l-HTML kellha
hello, comma, dinja taħt dan.

206
00:09:01,780 --> 00:09:06,090
U stajt sempliċiment irtirat hu fi ħdan
ovali minflok ta 'rettangolu biss

207
00:09:06,090 --> 00:09:10,559
biex twassal semantikament li anki jekk
huwa node fil-siġra, biex ngħidu hekk,

208
00:09:10,559 --> 00:09:12,100
huwa tip ta 'fundamentalment differenti.

209
00:09:12,100 --> 00:09:12,800
Mhuwiex tag.

210
00:09:12,800 --> 00:09:14,780
Jew aktar kif suppost, mhuwiex element.

211
00:09:14,780 --> 00:09:16,590
Huwa biss node test, jekk inti se.

212
00:09:16,590 --> 00:09:18,990
Iżda dawn huma kompletament
konvenzjonijiet umani arbitrarji.

213
00:09:18,990 --> 00:09:23,180
Dan huwa biss issa tiegħi mod ta '
li jirrappreżenta dak I ser bħala aggregat

214
00:09:23,180 --> 00:09:24,340
sejħa id-dokument.

215
00:09:24,340 --> 00:09:27,750
>> U bħala twarrib, il-ħaġa fil
il-kantuniera super top xellug,

216
00:09:27,750 --> 00:09:32,080
bracket miftuħa punt exclamation dok
tip HTML, dan qisu tikketta,

217
00:09:32,080 --> 00:09:35,560
imma hija l-każ kantuniera stupid fejn
li huwa biss hemm, kkupjati u pasted

218
00:09:35,560 --> 00:09:38,460
biex jindikaw il-browsers
dan huwa verżjoni HTML 5.

219
00:09:38,460 --> 00:09:41,540
Id-dinja jżomm jinbidlu dak li l-
ewwel linja tal-kodiċi fil-paġna għandu jkun.

220
00:09:41,540 --> 00:09:43,820
Dan ifisser biss verżjoni 5.

221
00:09:43,820 --> 00:09:45,950
Għalhekk ma pjuttost
jidhru bħall-oħrajn.

222
00:09:45,950 --> 00:09:48,120
>> Kull dritt, hekk ma 'dik
qal, inti ser issa japprezzaw

223
00:09:48,120 --> 00:09:50,767
dan pjuttost dan stupid
xi ħadd tatwaġġ ltqajna.

224
00:09:50,767 --> 00:09:51,990
>> [Rires]

225
00:09:51,990 --> 00:09:54,210
>> DAVID J Malan: Kull dritt,
u issa ejja attwalment adsa

226
00:09:54,210 --> 00:09:55,710
fis tagħmel xi ħaġa ma 'dan.

227
00:09:55,710 --> 00:09:58,610
Int ser ikollok ifakkar li l-aħħar darba
I fetaħ il-Appliance CS50

228
00:09:58,610 --> 00:10:01,650
u jien għamilt xi ħaġa bħala
Sempliċi kemm ftuħ gedit.

229
00:10:01,650 --> 00:10:05,190
U jien salvat il-fajl anki fuq
desktop-- tiegħi mkien special--

230
00:10:05,190 --> 00:10:05,870
kif hello.html.

231
00:10:05,870 --> 00:10:07,100

232
00:10:07,100 --> 00:10:10,984
>> So let me tagħmel dan
again-- hello.html Ikteb.

233
00:10:10,984 --> 00:10:13,900
U issa f'dan il-fajl, jien ser
imorru quddiem u jirreplika dak li aħna biss

234
00:10:13,900 --> 00:10:18,850
doc saw-- html tip Imbagħad jien ser
do html bracket miftuħa bracket magħluqa.

235
00:10:18,850 --> 00:10:21,890
U mbagħad jien ser preemptively
tiftaħ u tagħlaq il-lametta.

236
00:10:21,890 --> 00:10:22,390
Għaliex?

237
00:10:22,390 --> 00:10:23,598
Just so I ma ninsewx aktar tard.

238
00:10:23,598 --> 00:10:26,850
Huwa biss prattika tajba, bħall-ftuħ
u l-għeluq braces kaboċċi kollu f'daqqa.

239
00:10:26,850 --> 00:10:28,900
>> U allura dak daħal jmiss?

240
00:10:28,900 --> 00:10:30,582
Inti tista 'taħseb l-tatwaġġ.

241
00:10:30,582 --> 00:10:31,450
>> UDJENZA: Il-kap.

242
00:10:31,450 --> 00:10:32,500
>> DAVID J Malan: Il-kap.

243
00:10:32,500 --> 00:10:36,020
U mbagħad fil hawn, I
kellhom it-titolu, I think.

244
00:10:36,020 --> 00:10:39,886
U t-titolu kien arbitrarju,
hello, titolu qrib dinja.

245
00:10:39,886 --> 00:10:42,760
U mbagħad stabbiliti hawn, il-korp, ta '
course-- allura aħna tagħlaq il-lametta tal-ġisem.

246
00:10:42,760 --> 00:10:45,660
U mbagħad biss kemmxejn redundantly,
I kellha l-istess ħaġa stabbiliti hawn.

247
00:10:45,660 --> 00:10:47,150
>> So I jsostnu li dan huwa web page.

248
00:10:47,150 --> 00:10:49,050
Din hija xi ħaġa li
issa jistgħu jgħixu fuq il-web,

249
00:10:49,050 --> 00:10:51,925
anki jekk naturalment, huwa litteralment
jgħixu fuq id-desktop tiegħi dritt issa.

250
00:10:51,925 --> 00:10:55,837
Iżda tabilħaqq, jekk I jimminimizzaw gedit,
I ser tara fuq id-desktop tiegħi icon tagħha.

251
00:10:55,837 --> 00:10:58,420
Anke jekk dan huwa l-appliance,
inti tista 'tagħmel dan fuq Mac OS

252
00:10:58,420 --> 00:11:01,580
mingħajr TextEdit jew
Twieqi bi notepad anke.

253
00:11:01,580 --> 00:11:06,115
>> U jekk immur quddiem u ikklikkja darbtejn
li anke, u select-- sew, ejja

254
00:11:06,115 --> 00:11:07,990
M'għandekx tagħżel li minħabba
Chrome mhuwiex ftuħ.

255
00:11:07,990 --> 00:11:09,281
Ejja imorru quddiem u tiftaħ Chrome.

256
00:11:09,281 --> 00:11:10,160

257
00:11:10,160 --> 00:11:14,040
U mbagħad do Kmand-O għal open
U biex jinnavigaw desktop tiegħi

258
00:11:14,040 --> 00:11:15,320
u tiftaħ dan il-fajl.

259
00:11:15,320 --> 00:11:20,120
Din hija kif browser jinterpreta
HTML, fuq għal isfel, xellug għal-lemin.

260
00:11:20,120 --> 00:11:21,314
Ħej, browser hawn HTML.

261
00:11:21,314 --> 00:11:21,980
Hawn il-kap.

262
00:11:21,980 --> 00:11:23,250
Hawn it-titolu.

263
00:11:23,250 --> 00:11:24,090
Hawn il-ġisem.

264
00:11:24,090 --> 00:11:26,620
U fil-fatt, dan huwa kif
jirrendi dik il-paġna web.

265
00:11:26,620 --> 00:11:27,800
>> Iżda avviż-URL.

266
00:11:27,800 --> 00:11:32,430
Xejn tal inti tista 'pull up dan speċifika
paġna fuq laptops tiegħek dritt issa,

267
00:11:32,430 --> 00:11:34,910
anki ġewwa tal tiegħek
appliance permezz ta 'dak URL,

268
00:11:34,910 --> 00:11:40,130
minħabba fajl: // jindika huwa attwalment
fit-fajl sistema tiegħi, hard drive tiegħi,

269
00:11:40,130 --> 00:11:40,990
mhux tiegħek.

270
00:11:40,990 --> 00:11:42,440
Allura dan mhux kollha li utli.

271
00:11:42,440 --> 00:11:44,940
>> Ejja issa jimxu lejn
użu ta 'web server attwali.

272
00:11:44,940 --> 00:11:48,309
U jirriżulta li l-Appliance CS50
huwa aktar minn sempliċiment f'ambjent fejn

273
00:11:48,309 --> 00:11:51,100
inti tista 'tikteb kodiċi C u jikkumpilaw
u run bħal inti kont qed tagħmel.

274
00:11:51,100 --> 00:11:55,500
Hija wkoll ġiet ikkonfigurata mill-
persunal li jirrappreżentaw web tipiku

275
00:11:55,500 --> 00:11:58,290
server li fuq l-internet,
wieħed li inti tista 'tħallas għall

276
00:11:58,290 --> 00:12:00,210
jew wieħed li fil-sħaba hekk imsejħa.

277
00:12:00,210 --> 00:12:02,600
>> U huwa taħdem
sors standard miftuħ ħielsa

278
00:12:02,600 --> 00:12:06,160
software, per eżempju, xi ħaġa
imsejħa Apache, li hija forsi

279
00:12:06,160 --> 00:12:08,700
għadu l-web-aktar popolari
server software fid-dinja

280
00:12:08,700 --> 00:12:11,030
li eluf ta 'websajts użu lum.

281
00:12:11,030 --> 00:12:13,420
U wkoll anki għandha
software simili MySQL,

282
00:12:13,420 --> 00:12:16,240
li huwa server database
li aħna ser eventwalment tikseb sa,

283
00:12:16,240 --> 00:12:18,330
li huwa biss li jgħidu
I tista 'tibda trattament

284
00:12:18,330 --> 00:12:22,040
appliance tiegħi bħala server żviluppata sħiħa
li jien ma tħallas għal x'imkien ieħor.

285
00:12:22,040 --> 00:12:25,980
Hija biss jgħix fuq laptop tiegħi stess għall
finijiet ta 'żvilupp u l-konvenjenza.

286
00:12:25,980 --> 00:12:27,870
>> Mela ejja imorru quddiem u
jieħdu vantaġġ ta 'dan.

287
00:12:27,870 --> 00:12:30,120
Jien ser jimxi 'l quddiem u
jiftħu tieqa terminal.

288
00:12:30,120 --> 00:12:33,030
U jien ser jimxi 'l quddiem u
move-- attwalment, l-ewwel jien

289
00:12:33,030 --> 00:12:34,860
ser jinnaviga għal desktop tiegħi.

290
00:12:34,860 --> 00:12:36,400
Jekk I do ls, hemm hello.html.

291
00:12:36,400 --> 00:12:37,022

292
00:12:37,022 --> 00:12:38,730
U jien se jmorru
quddiem u tibda tuża

293
00:12:38,730 --> 00:12:40,800
direttorju ġdid konna
mhux użat qabel illum.

294
00:12:40,800 --> 00:12:46,840
>> hello.html-- Jien ser jimxu
li ../vhosts għall hosts-- virtwali

295
00:12:46,840 --> 00:12:50,940
aktar fuq li fil-future-- u mbagħad
fis direttorju imsejjaħ localhost,

296
00:12:50,940 --> 00:12:54,420
li hija l-laqam mogħti għal kważi
kwalunkwe kompjuter, kemm jekk huwa Mac, PC,

297
00:12:54,420 --> 00:12:57,560
jew Linux kompjuter, u mbagħad
speċifikament fis-direttorju li aħna,

298
00:12:57,560 --> 00:13:01,260
l-istaff diġà maħluqa għalik meta
inti jitniżżel l-appliance imsejħa

299
00:13:01,260 --> 00:13:01,760
pubbliku.

300
00:13:01,760 --> 00:13:04,551
U kif ismu jissuġġerixxi, xejn
Nressaq fil this folder, fit-teorija,

301
00:13:04,551 --> 00:13:07,790
se issa tkun
pubbliku, għall-inqas għall-persuni

302
00:13:07,790 --> 00:13:10,030
li jkollhom dirett
konnessjoni mal-kompjuter tiegħi.

303
00:13:10,030 --> 00:13:13,160
>> Allura issa let me imorru quddiem u
tagħmel cd din l-istess direttorju

304
00:13:13,160 --> 00:13:15,490
so I tista 'tara x'hemm
għaddej u ls-tip.

305
00:13:15,490 --> 00:13:17,630
U fil-fatt, dak l-
unika ħaġa fil hemmhekk.

306
00:13:17,630 --> 00:13:23,250
Nitlob issa li minħabba I poġġew dan
fajl hello.html ġewwa ta 'direttorju

307
00:13:23,250 --> 00:13:26,940
imsejjaħ ġewwa pubblika ta 'direttorju
imsejħa localhost ġewwa ta 'direttorju

308
00:13:26,940 --> 00:13:29,810
imsejħa vhosts, li
grazzi għall-persunal CS50

309
00:13:29,810 --> 00:13:34,390
ġie pre-kkonfigurat biex tkun
l-għerq tal-web server tiegħek,

310
00:13:34,390 --> 00:13:36,900
I issa jistgħu nisperaw tagħmel dan.

311
00:13:36,900 --> 00:13:38,390
>> Jien ser jiftħu ġdid tab.

312
00:13:38,390 --> 00:13:40,090
U jien se jmorru ma fajl: //.

313
00:13:40,090 --> 00:13:44,520
Jien ser tuża attwali
http / localhost, li

314
00:13:44,520 --> 00:13:47,470
għal darb'oħra, huwa l-laqam
għall-server tiegħi stess.

315
00:13:47,470 --> 00:13:51,085
U mbagħad jien se jmorru għal dak li
fajl isem, biss biex tkun ċara?

316
00:13:51,085 --> 00:13:52,680

317
00:13:52,680 --> 00:13:54,320
Fejn din l-istorja probabbilment se?

318
00:13:54,320 --> 00:13:56,066

319
00:13:56,066 --> 00:13:56,565
hello.html.

320
00:13:56,565 --> 00:13:58,350

321
00:13:58,350 --> 00:14:04,270
>> Allura fi kliem ieħor, nixtieq li issa dan
huwa kompjuter tiegħi stess, appliance tiegħi stess,

322
00:14:04,270 --> 00:14:05,660
bħallikieku huwa ta 'server attwali.

323
00:14:05,660 --> 00:14:07,490
Laqam tiegħu huwa localhost.

324
00:14:07,490 --> 00:14:10,210
Imma naħseb ta 'localhost bħala simili
Facebook.com google.com, ikun x'ikun.

325
00:14:10,210 --> 00:14:11,600
Huwa biss l-isem lokali tiegħi.

326
00:14:11,600 --> 00:14:14,810
U allura l-aħħar nixtieq huwa fil-
għerq tal-hard drive, biex ngħidu hekk,

327
00:14:14,810 --> 00:14:17,729
jew l-għerq tal-web server,
għalhekk jimmiraw il quddiem mmejla u mbagħad

328
00:14:17,729 --> 00:14:18,770
l-isem ta 'fajl hello.html.

329
00:14:18,770 --> 00:14:19,880

330
00:14:19,880 --> 00:14:21,930
>> Let me zoom out u hit Ikteb.

331
00:14:21,930 --> 00:14:24,266
U fil-fatt, issa hemm paġna web tiegħi.

332
00:14:24,266 --> 00:14:25,390
Allura huwa kemmxejn differenti.

333
00:14:25,390 --> 00:14:26,880
U huwa biss bħala underwhelming.

334
00:14:26,880 --> 00:14:27,904
Din hija l-verżjoni l-qadima.

335
00:14:27,904 --> 00:14:29,070
Let me tiċkien il-font lura.

336
00:14:29,070 --> 00:14:29,745
Dan huwa l-antika.

337
00:14:29,745 --> 00:14:30,890
Dan huwa l-ġdida.

338
00:14:30,890 --> 00:14:35,430
Imma x'inhu fundamentalment jiġri
issa hija li HTTP qed jintuża.

339
00:14:35,430 --> 00:14:39,344
>> Ejja jagħmlu dan ftit aktar ċara jew,
jekk inti se, ftit aktar kumplikata.

340
00:14:39,344 --> 00:14:41,760
Let me go fuq il-lemin tal-qiegħ
lemin ta 'appliance tiegħi.

341
00:14:41,760 --> 00:14:44,000
U tinnota li dan kollu
ħin, hemm kien numru.

342
00:14:44,000 --> 00:14:47,330
Dan huwa l-indirizz uniku
ta Appliance CS50 tiegħek.

343
00:14:47,330 --> 00:14:50,800
Huwa l-indirizz privat,
kif implikat mill-172.16,

344
00:14:50,800 --> 00:14:53,860
li ifisser biss biss li inti fiżikament
tista 'aċċess din il-web server.

345
00:14:53,860 --> 00:14:56,340
Kollox huwa firewalled u
nicely protett mill-bqija

346
00:14:56,340 --> 00:14:58,130
tad-dinja minħabba dan indirizzar.

347
00:14:58,130 --> 00:15:01,920
>> U issa avviż għalkemm jekk mmur
dan l-indirizz, mhux fl-apparat tiegħi,

348
00:15:01,920 --> 00:15:04,340
iżda fil Mac OS-- jien ser
li jmorru lura fuq hawn.

349
00:15:04,340 --> 00:15:05,930
Dan huwa Mac tiegħi issa.

350
00:15:05,930 --> 00:15:08,460
U issa jien ser jiftħu
din il-verżjoni tal Chrome hawn.

351
00:15:08,460 --> 00:15:17,370
U jien se jmorru lil http: //172.16.25
/ U ninsa l rest-- 133.

352
00:15:17,370 --> 00:15:25,210
>> Hekk jien ser żjara mill Mac tiegħi
dak l-indirizz IP /hello.html Ikteb.

353
00:15:25,210 --> 00:15:29,850
U issa nara minn Mac tiegħi
li Appliance CS50 tiegħi, li l-

354
00:15:29,850 --> 00:15:32,600
Indirizz IP huwa li
numru, tabilħaqq iġib ruħu

355
00:15:32,600 --> 00:15:34,320
bħal web server fuq l-internet.

356
00:15:34,320 --> 00:15:36,944
Huwa ma jkollu sbieħ faċli biex
ftakar isem bħal Facebook.com,

357
00:15:36,944 --> 00:15:40,370
imma hija użu HTTP
apparentement, anki jekk Chrome

358
00:15:40,370 --> 00:15:43,560
huwa tip ta 'simplifikazzjoni-dinja
għalina imma li ma jurix us HTTP.

359
00:15:43,560 --> 00:15:46,210
Iżda dan huwa tabilħaqq eżattament dan.

360
00:15:46,210 --> 00:15:48,470
Chrome huwa biss iffrankar xi
keystrokes dawn il-jiem.

361
00:15:48,470 --> 00:15:50,530
U dan huwa dak li aħna issa tara.

362
00:15:50,530 --> 00:15:51,890
>> Allura li kollox multa u tajba.

363
00:15:51,890 --> 00:15:53,740
Imma hija paġna pretty underwhelming.

364
00:15:53,740 --> 00:15:56,230
Let me jmorru fi u tagħmel xi ħaġa
ftit differenti issa.

365
00:15:56,230 --> 00:15:57,910
So let me jmorru lura għall gedit.

366
00:15:57,910 --> 00:16:00,580
U minflok ta hello,
dinja, ejja tpoġġi immaġini.

367
00:16:00,580 --> 00:16:05,880
U jien ma jintalabx mill before-- let me go
fis tiegħi pubbliku direttorju localhost.

368
00:16:05,880 --> 00:16:10,580
U let me imorru quddiem u kopja
mazz sħiħ ta 'fajls mill-lum

369
00:16:10,580 --> 00:16:15,633
minn folder Dropbox tiegħi fis hawn.

370
00:16:15,633 --> 00:16:19,470

371
00:16:19,470 --> 00:16:21,680
>> Issa jekk I ls tip, tfittex
fuq dawn il-fajls kollha

372
00:16:21,680 --> 00:16:24,940
li stajt mqassma mill-
websajt kors fl-quddiem tal-lum,

373
00:16:24,940 --> 00:16:26,830
wieħed minnhom għadu hello.html.

374
00:16:26,830 --> 00:16:27,830
Allura hemm li wieħed.

375
00:16:27,830 --> 00:16:30,730
U recall dan wieħed iblah
mill-aħħar cat.jpg time--.

376
00:16:30,730 --> 00:16:34,550
So let me jippruvaw ssodata
cat.jpg ġewwa tal-paġna tal-web tiegħi.

377
00:16:34,550 --> 00:16:37,690
>> Jien ser jimxi 'l quddiem
u jagħmlu cat.jpg, jiffrankaw.

378
00:16:37,690 --> 00:16:38,950
Let me jmorru lura għall Chrome.

379
00:16:38,950 --> 00:16:41,140
U let me zoom fil-
font u issa rikarigu.

380
00:16:41,140 --> 00:16:43,090

381
00:16:43,090 --> 00:16:45,030
Oops, fejn nressaq dan?

382
00:16:45,030 --> 00:16:48,210

383
00:16:48,210 --> 00:16:51,520
Standby-- I għadhom l-qodma
Verżjoni minn desktop miftuħa tiegħi.

384
00:16:51,520 --> 00:16:56,020
So let me go fis vhost tiegħi, tiegħi
localhost, pubbliku tiegħi, u hello.html.

385
00:16:56,020 --> 00:16:57,320

386
00:16:57,320 --> 00:17:00,670
Allura issa let me imorru quddiem u
jgħidu cat.jpg ġewwa tal-ġisem

387
00:17:00,670 --> 00:17:02,830
fejn I tixtieq li jkun
murija u rikarigu.

388
00:17:02,830 --> 00:17:04,560
Of course, dan mhux korrett.

389
00:17:04,560 --> 00:17:08,050
>> So I bżonn li tgħid il-browser ftit
aktar deliberatament dak li nixtieq li tagħmel.

390
00:17:08,050 --> 00:17:10,210
Simply ittajpjar l-isem huwa
ovvjament mhux biżżejjed.

391
00:17:10,210 --> 00:17:15,134
Allura tfakkar li kien hemm ieħor
tikketta, immaġni, IMG-qasir.

392
00:17:15,134 --> 00:17:17,550
Li jinsab biss għax bnedmin
ma bħall-kliem sħiħ tat-tip.

393
00:17:17,550 --> 00:17:19,050
U allura nistgħu nagħmlu sors = "cat.jpg".

394
00:17:19,050 --> 00:17:21,470

395
00:17:21,470 --> 00:17:23,550
>> U issa jien se tagħmel
ħaġa waħda differenti hawn.

396
00:17:23,550 --> 00:17:25,390
Anke jekk kollha
tags tagħna s'issa jkollhom

397
00:17:25,390 --> 00:17:28,086
kellhom dan il-kunċett ta '
tibda tag u tikketta għan,

398
00:17:28,086 --> 00:17:30,210
li ma verament tagħmel
sens għal immaġni, id-dritt?

399
00:17:30,210 --> 00:17:32,430
An image huwa jew hemm jew m'hemmx.

400
00:17:32,430 --> 00:17:36,650
U għalhekk il-bnedmin waslu
up ma 'konvenzjoni sempliċi.

401
00:17:36,650 --> 00:17:40,310
Meta għandek tag li tista 'kemm
jibdew u jispiċċaw fl-istess time--

402
00:17:40,310 --> 00:17:43,790
jista 'jkun vojta, hekk li speak-- biss
tpoġġi l-quddiem mmejla ġewwa tal-lametta

403
00:17:43,790 --> 00:17:44,710
fl-aħħar ħafna.

404
00:17:44,710 --> 00:17:45,776

405
00:17:45,776 --> 00:17:47,150
Issa let me jmorru lura lill-browser tiegħi.

406
00:17:47,150 --> 00:17:50,377
Hit Reload Indanna, xi ħaġa ħażin.

407
00:17:50,377 --> 00:17:52,460
You ħadthom probabbilment jidhru dan
kultant fuq il-web,

408
00:17:52,460 --> 00:17:53,600
anki jekk huwa ma kienx tort tiegħek.

409
00:17:53,600 --> 00:17:54,766
Huwa tort tal-web server.

410
00:17:54,766 --> 00:17:56,240
Liema odes dan jidher li jindika?

411
00:17:56,240 --> 00:17:57,450

412
00:17:57,450 --> 00:17:58,009
Huwa imkisser.

413
00:17:58,009 --> 00:17:59,300
Li meta l-immaġini jappartjeni.

414
00:17:59,300 --> 00:17:59,700
Yeah?

415
00:17:59,700 --> 00:18:01,560
>> UDJENZA: Iżda dan ma jkunx
jkollhom aċċess għall-immaġini.

416
00:18:01,560 --> 00:18:03,070
>> DAVID J Malan: ma
jkollhom aċċess għall-immaġini.

417
00:18:03,070 --> 00:18:05,230
Li, jew saħansitra agħar, forsi
ma jeżistux.

418
00:18:05,230 --> 00:18:06,729
Ejja naraw jekk aħna ma tistax jiddijanjostikaw dan.

419
00:18:06,729 --> 00:18:09,390
Recall minn aħħar darba li jekk
fil Chrome, fl-appliance,

420
00:18:09,390 --> 00:18:11,870
jew anki fuq Mac tiegħek jew PC,
inti mur fil-menu Developer

421
00:18:11,870 --> 00:18:14,650
u mur l-Għodod Developer
għażla, li probabbilment inti stajt

422
00:18:14,650 --> 00:18:16,850
ma tintużax ħafna jew qatt.

423
00:18:16,850 --> 00:18:20,780
U jekk immur għal network
u rikarigu-paġna,

424
00:18:20,780 --> 00:18:24,110
ejja attwalment tħares lejn l-HTTP
jitlob li ikunu qed isiru.

425
00:18:24,110 --> 00:18:28,400
>> Jidher qisu hello.html huwa
tabilħaqq OK, għalhekk il-200.

426
00:18:28,400 --> 00:18:30,630
Iżda cat.jpg huwa 403.

427
00:18:30,630 --> 00:18:31,650
Allura huwa mhux 404.

428
00:18:31,650 --> 00:18:33,490
File probabbilment teżisti.

429
00:18:33,490 --> 00:18:35,250
403 ifisser pprojbit.

430
00:18:35,250 --> 00:18:37,790
Allura dan huwa ftit konfuża.

431
00:18:37,790 --> 00:18:42,340
Jien se jmorru lura
tieqa terminal tiegħi.

432
00:18:42,340 --> 00:18:43,700
Let me zoom up here.

433
00:18:43,700 --> 00:18:44,750
U let me do ls.

434
00:18:44,750 --> 00:18:46,430
Hemm dawk l-istess fajls.

435
00:18:46,430 --> 00:18:49,410
>> Issa let me do ls-l,
li inti stajt probabilment

436
00:18:49,410 --> 00:18:53,350
użat qabel biex tħares lejn fajl
daqsijiet forsi jew timestamps.

437
00:18:53,350 --> 00:18:55,590
U naraw mazz sħiħ ta '
informazzjoni kbira.

438
00:18:55,590 --> 00:18:57,040
Imma avviż ftit dettalji.

439
00:18:57,040 --> 00:19:01,660
Hawn hello.html f'dan
ringiela hawn u hawn cat.jpg.

440
00:19:01,660 --> 00:19:02,934

441
00:19:02,934 --> 00:19:05,850
U huwa biss l-appliance li tkun
friendly billi tenfasizza l JPEG utent

442
00:19:05,850 --> 00:19:07,380
vjola bħal dan.

443
00:19:07,380 --> 00:19:11,470
Imma dak inkella huwa differenti ħdejn
il-daqs tal-fajl u l-isem fajl?

444
00:19:11,470 --> 00:19:13,438

445
00:19:13,438 --> 00:19:14,754
>> UDJENZA: [inaudible].

446
00:19:14,754 --> 00:19:16,920
DAVID J Malan: Yeah, hemm
żewġ aktar R matul hawn.

447
00:19:16,920 --> 00:19:20,170
Avviż dak hello.html jkun għaddej.

448
00:19:20,170 --> 00:19:24,050
Għalhekk jirriżulta li l-isem ta '
dan pubblika direttorju huwa importanti.

449
00:19:24,050 --> 00:19:26,400
Xejn f'dan id-direttorju
huwa maħsub li jkun pubbliku.

450
00:19:26,400 --> 00:19:28,790
Iżda mhux biżżejjed
biss biex qatra fajls fil hemmhekk.

451
00:19:28,790 --> 00:19:31,480
Għandek bżonn ukoll li tinbidel
il-mod tal-fajls,

452
00:19:31,480 --> 00:19:35,180
jibdlu l-permessi ta '
l-fajl biex b'mod proattiv ma

453
00:19:35,180 --> 00:19:37,650
jkollu ssettjar default,
li hija li huwa biss I tista 'taqra

454
00:19:37,650 --> 00:19:39,220
u jiktbu, I tkun is-sid.

455
00:19:39,220 --> 00:19:43,540
Irrid li l-kulħadd kollu dinja biex
jkun kapaċi li jaqra fajl tiegħi, biex ngħidu hekk.

456
00:19:43,540 --> 00:19:44,950
Aqra ifisser biss tarah.

457
00:19:44,950 --> 00:19:49,780
>> U fil-fatt, kif tkun taf tara fil-problema
sett seba, dan huwa dak medju ta 'dawn R.

458
00:19:49,780 --> 00:19:53,160
Medja Dawn iż-żewġ R let kulħadd
ieħor fid-dinja taqra wkoll,

459
00:19:53,160 --> 00:19:55,300
speċjalment issa li
huwa f'dan id-direttorju.

460
00:19:55,300 --> 00:19:59,620
Allura l-eħfef mod biex jiffissaw dan huwa li
mur fil-pront tiegħi u jagħmlu chmod għall-bidla

461
00:19:59,620 --> 00:20:05,580
modalità u mbagħad do a + r, għal kollox,
kulħadd, kollha, flimkien ma 'r għall read,

462
00:20:05,580 --> 00:20:07,944
u mbagħad cat.jpg Ikteb.

463
00:20:07,944 --> 00:20:10,360
Xejn ma jidher li jiġri, li
normalment ifisser ħaġa tajba.

464
00:20:10,360 --> 00:20:13,850
Hekk ls-l again-- issa
ejja nħarsu lejn cat.jpg.

465
00:20:13,850 --> 00:20:15,750
U dan il-permess
jidhru li nbidlu.

466
00:20:15,750 --> 00:20:18,670
Bħala twarrib, jekk inti tagħmel
żball u inti, per eżempju,

467
00:20:18,670 --> 00:20:23,210
biss magħmula your-- I ma know-- essay
aċċessibbli għall-pubbliku mill-inċident,

468
00:20:23,210 --> 00:20:25,480
inti tista 'tagħmel l-oppost, chmod a-r.

469
00:20:25,480 --> 00:20:25,909

470
00:20:25,909 --> 00:20:28,200
Għalkemm franchement, dan m'għandux
tkun fil-direttorju pubbliku

471
00:20:28,200 --> 00:20:29,760
xorta waħda jekk dan huwa l-tħassib.

472
00:20:29,760 --> 00:20:32,475
>> Allura issa ejja mmorru lura għall
browser tiegħi u rikarigu.

473
00:20:32,475 --> 00:20:32,904

474
00:20:32,904 --> 00:20:34,820
U jien ser ikklikkja
il-Ghostbusters ftit

475
00:20:34,820 --> 00:20:38,030
simbolu ċar li parti mill-
iskrin sabiex nistgħu naraw talbiet ġodda.

476
00:20:38,030 --> 00:20:40,630
U fil-fatt, hawnhekk huwa
Cat Grump minn qabel.

477
00:20:40,630 --> 00:20:43,010
Iżda aktar importanti,
teknikament, hemm

478
00:20:43,010 --> 00:20:45,565
in-numru 200, li
ifisser li aħna ltqajna OK.

479
00:20:45,565 --> 00:20:47,190
Kull dritt, hekk li kollox multa u tajba.

480
00:20:47,190 --> 00:20:48,940
Iżda aħna ma tkunx qed tagħmel
l-aħjar ta 'websajts,

481
00:20:48,940 --> 00:20:51,967
u lanqas ma huma aħna ser jippruvaw wisq diffiċli biex
jagħmlu l-fanciest 'websajts llum.

482
00:20:51,967 --> 00:20:54,550
Imma ejja mill-inqas jagħmlu xi ħaġa
super familjari qabel jinstemgħu

483
00:20:54,550 --> 00:20:56,030
off tags oħra ftit.

484
00:20:56,030 --> 00:20:58,470
So suppose I ma jridux biss qattus hawn.

485
00:20:58,470 --> 00:21:02,530
Suppose I attwalment jixtiequ dan
qattus biex tagħmel link għal xi ħaġa.

486
00:21:02,530 --> 00:21:07,210
>> I jista ', per eżempju
tagħmel xi ħaġa bħal din.

487
00:21:07,210 --> 00:21:08,580

488
00:21:08,580 --> 00:21:12,890
a għal ankra href għall
equals-- referenza iper

489
00:21:12,890 --> 00:21:17,440
u ejja biss tagħmel xi ħaġa
bħal www.google.com qrib

490
00:21:17,440 --> 00:21:19,540
jikkwotaw bracket qrib.

491
00:21:19,540 --> 00:21:22,000
U issa tiftix għall-qtates.

492
00:21:22,000 --> 00:21:23,520
Tag ankra qrib.

493
00:21:23,520 --> 00:21:26,760
Allura dan għandu sort wieħed biss
dettall tal fundamentalment ġdid.

494
00:21:26,760 --> 00:21:28,190
Il-lametta tal-kors, huwa differenti.

495
00:21:28,190 --> 00:21:31,770
Hu l-isem ta 'għall-ankra
referenza href jew iper.

496
00:21:31,770 --> 00:21:35,269
>> Iżda aktar importanti, hemm
din il-karatteristika sintattika hawn.

497
00:21:35,269 --> 00:21:37,810
Dan huwa dak li aħna ser tibda sejħa
mhux tikketta, iżda attribut.

498
00:21:37,810 --> 00:21:40,830
U attribut hija xi ħaġa li
timmodifika l-imġiba ta 'tag.

499
00:21:40,830 --> 00:21:45,400
U dan l-attribut, href, mezzi
jimmodifikaw l-imġiba ta 'dan ankra

500
00:21:45,400 --> 00:21:48,430
b'tali mod li meta huwa għafast,
din tmur lil dan il-URL hawn.

501
00:21:48,430 --> 00:21:50,330
U ovvjament, dan URL huwa Google.

502
00:21:50,330 --> 00:21:53,951
>> Sadanittant, dak li huwa dan
test hawn se tkun?

503
00:21:53,951 --> 00:21:55,950
Ukoll, li għaddej biex tkun
dak li l-bniedem fil-fatt

504
00:21:55,950 --> 00:21:58,470
jara bħala l-enfasizza
rabta, sempliċi bħal dik.

505
00:21:58,470 --> 00:21:59,220
Mela ejja jippruvaw dan.

506
00:21:59,220 --> 00:21:59,980
Let me isalvawh.

507
00:21:59,980 --> 00:22:01,650
Jien xorta fil hello.html.

508
00:22:01,650 --> 00:22:05,360
Iżda fil-verżjonijiet online, inti ser tara
l-ismijiet attwali fajl aħna mħejjija minn qabel.

509
00:22:05,360 --> 00:22:06,805
Let me imorru quddiem u rikarigu.

510
00:22:06,805 --> 00:22:08,680
U issa huwa ħafna
paġna underwhelming xorta.

511
00:22:08,680 --> 00:22:10,910
Imma jekk jien imbagħad jerġgħu jsiru fuq there--
u huwa ftit żgħira,

512
00:22:10,910 --> 00:22:13,576
but-- tista 'tara fil-qiegħ
rokna tax-xellug tal-iskrin tiegħek,

513
00:22:13,576 --> 00:22:15,242
huwa tabilħaqq għaddej biex google.com.

514
00:22:15,242 --> 00:22:19,280
U jekk I ikklikkja li, li se
whisk me mod għall-Google attwali.

515
00:22:19,280 --> 00:22:22,610
>> Iżda avviż hawn opportunità għar
isfruttament, biss bħala twarrib.

516
00:22:22,610 --> 00:22:25,150
U aħna ser terga 'lura għal ieħor
kwistjonijiet ta 'sigurtà qabel twil.

517
00:22:25,150 --> 00:22:29,290
Għaliex hemm din id-dikotomija
bejn fejn inti tmur u dak li jgħidu,

518
00:22:29,290 --> 00:22:34,722
inti tista 'tagħmel xi ħaġa simili
this-- http://www.google.com.

519
00:22:34,722 --> 00:22:37,134
OK, u issa jekk I rikarigu
wara iffrankar dik il-paġna,

520
00:22:37,134 --> 00:22:38,800
jidher qisu jien ser tmur Google.

521
00:22:38,800 --> 00:22:40,966
Iżda hemm ebda raġuni I
ikollhom imorru għall Google, id-dritt?

522
00:22:40,966 --> 00:22:47,460
I tista 'attwalment tmur għal xi ħaġa bħal
badguy.com, rikarigu-paġna hawn fuq.

523
00:22:47,460 --> 00:22:49,750
U avżat, hija xorta qisu Google.

524
00:22:49,750 --> 00:22:52,020
U biss jekk jien sharp
biżżejjed biex imbagħad jerġgħu hawn fuq

525
00:22:52,020 --> 00:22:54,770
do I tara huwa lanqas se
mur għal post differenti.

526
00:22:54,770 --> 00:22:57,400
>> Mela jekk inti stajt qatt gotten
email, speċjalment

527
00:22:57,400 --> 00:22:59,610
wieħed minn Paypal, jew
apparentement mill Paypal

528
00:22:59,610 --> 00:23:01,830
inti titlob log fil
għall-kont tiegħek, dan

529
00:23:01,830 --> 00:23:06,380
huwa għalfejn inti għandek qatt
qatt ikklikkja links fl-emails,

530
00:23:06,380 --> 00:23:07,930
franchement, xi links fl-emails.

531
00:23:07,930 --> 00:23:10,380
Jekk inti taf li għandek attwali
flus fil Paypal jew Bank

532
00:23:10,380 --> 00:23:14,250
ta 'l-Amerika jew fedeltà jew kwalunkwe
website, manwalment tip fil.

533
00:23:14,250 --> 00:23:17,530
Għaliex tħares kemm huwa faċli biex
trick xi ħadd fis jippreżentaw liema

534
00:23:17,530 --> 00:23:18,526
qisu rabta.

535
00:23:18,526 --> 00:23:20,400
Iżda fil-fatt jista '
tmur assolutament kullimkien.

536
00:23:20,400 --> 00:23:23,301
>> U hemm ferm akbar
theddid minn dan.

537
00:23:23,301 --> 00:23:25,300
Fil-fatt, dan huwa daqsxejn
ta 'tanġent issa, iżda wieħed

538
00:23:25,300 --> 00:23:28,430
mill-aħjar fosthom jien qatt raw
li wara ġie magħluq,

539
00:23:28,430 --> 00:23:34,060
huwa xi ħadd wassal nies
to-- għalhekk dan jista 'jgħid,

540
00:23:34,060 --> 00:23:37,660
ikklikkja hawn biex log fis tiegħek
kont, kont bankarju.

541
00:23:37,660 --> 00:23:40,985
U dan kien Bank tal-Punent.

542
00:23:40,985 --> 00:23:43,030

543
00:23:43,030 --> 00:23:44,250
>> Allura xi ħadd mixtrija dan.

544
00:23:44,250 --> 00:23:47,090
U huwa ftit aktar faċli biex tara
dan fil-mono spazjati font żżomjati

545
00:23:47,090 --> 00:23:49,190
fl fuq projector 30-sieq.

546
00:23:49,190 --> 00:23:51,720
Imma meta huwa font żgħar fi
email li int tirċievi,

547
00:23:51,720 --> 00:23:54,690
dan qisu bankofthewest.com,
mhux bankofthevvest.com,

548
00:23:54,690 --> 00:23:58,230
li xi ħadd kien mħallsa $ 10 sa jixtru.

549
00:23:58,230 --> 00:24:00,840
U allura dan wassal biex il-
ekwivalenti ta 'xi websajt ħażina.

550
00:24:00,840 --> 00:24:05,540
>> U tkun taf tara too-- attwalment nistgħu nagħmlu
this-- jekk I tmur fil-websajt attwali,

551
00:24:05,540 --> 00:24:10,335
bankofthewest.com, għal darb'oħra,
irtirar mill-aħħar darba

552
00:24:10,335 --> 00:24:13,210
li jekk dan huwa il-paġna web tagħhom u
int kurjużi dwar kif taħdem,

553
00:24:13,210 --> 00:24:15,610
inti tista 'ċertament tmur lil
Għodod iżviluppatur Chrome.

554
00:24:15,610 --> 00:24:18,890
U inti tista 'tara kollha ta' l-
HTML nicely formattjati hemmhekk.

555
00:24:18,890 --> 00:24:20,890
>> Iżda aktar lejn il-punt,
inti cam-- ejja qrib

556
00:24:20,890 --> 00:24:24,760
this-- inti tista 'tmur View
Developer View Sors.

557
00:24:24,760 --> 00:24:25,770

558
00:24:25,770 --> 00:24:28,350
Għaliex ma I biss kopja
kollha ta 'dik U mbagħad I

559
00:24:28,350 --> 00:24:31,630
tista 'tmur fil-tieqa tiegħi gedit ftit
hawn u tagħmel il-paġna tiegħi stess web.

560
00:24:31,630 --> 00:24:33,210
Ħlief dan fil hello.html.

561
00:24:33,210 --> 00:24:36,770
U probabbilment dan se break,
għaliex mhuwiex dan faċli normalment.

562
00:24:36,770 --> 00:24:41,590
Imma issa jekk I rikarigu-paġna tiegħi stess fuq
tiegħi stess CS50 Appliance u rikarigu hit,

563
00:24:41,590 --> 00:24:42,990
OK, xi għalf kissru.

564
00:24:42,990 --> 00:24:45,750
Imma jien pretty qrib biex wara
website bankarja tiegħi stess, id-dritt?

565
00:24:45,750 --> 00:24:46,570
Kollha ta 'dan HTML--

566
00:24:46,570 --> 00:24:47,370
>> [Rires]

567
00:24:47,370 --> 00:24:49,210
>> DAVID J Malan: --I
ma actually-- u int

568
00:24:49,210 --> 00:24:52,210
taf hemm xi ħadd hemmhekk li
fil-fatt ikklikkja dawn ir-rabtiet wisq.

569
00:24:52,210 --> 00:24:54,864
Allura ċar, xi għalf kissru.

570
00:24:54,864 --> 00:24:56,780
Iżda li għaddej biex twassal
lilna fis diskussjoni,

571
00:24:56,780 --> 00:25:00,810
bla bżonn dritt issa, bħala dak li
CSS, Cascading Style Sheets, huma,

572
00:25:00,810 --> 00:25:03,410
u kif inti fil-fatt
tniżżel il-fajls oħra HTML

573
00:25:03,410 --> 00:25:06,140
u JPEG fajls GIF fajls li
il-websajt tista 'tuża.

574
00:25:06,140 --> 00:25:07,960
Iżda kollha ta 'dan huwa accomplishable.

575
00:25:07,960 --> 00:25:11,110
Imma huwa verament jeħodna għall
dawn heuristics sempliċi ħafna.

576
00:25:11,110 --> 00:25:14,450
>> Allura issa ejja biss skim permezz ta '
ftit eżempji oħra ta 'HTML

577
00:25:14,450 --> 00:25:16,680
biss biex jagħtuk sens
ta 'dak li inkella inti tista' tagħmel.

578
00:25:16,680 --> 00:25:18,670
Per eżempju, dan huwa list.html.

579
00:25:18,670 --> 00:25:23,240
Suppose I riedu jagħmlu web page
ma 'lista ta' djar fil-quad.

580
00:25:23,240 --> 00:25:28,960
I jistgħu jużaw l-tikketta ul għal unordered
lista u mbagħad l-oġġett lista tfal

581
00:25:28,960 --> 00:25:33,760
u mbagħad jtenni over-- jew lista,
rather---djar in kwistjoni.

582
00:25:33,760 --> 00:25:36,080
>> U jekk I miftuħa dan up, ejja tagħmel dan.

583
00:25:36,080 --> 00:25:40,670
Ejja ħa mmorru ma hello.html,
imma biex list.html.

584
00:25:40,670 --> 00:25:42,160
Kkritikat dan.

585
00:25:42,160 --> 00:25:43,000
Kif nista jiffissaw dan?

586
00:25:43,000 --> 00:25:45,679

587
00:25:45,679 --> 00:25:47,220
Huwa l-istess kwistjoni bħal qabel, id-dritt?

588
00:25:47,220 --> 00:25:52,510
So let me do oops-- chmod--
r ta 'list.html chmod a +.

589
00:25:52,510 --> 00:25:54,610

590
00:25:54,610 --> 00:25:59,610
U issa jekk immur lura lill-browser tiegħi
u kklikkja Reload, hemm hu.

591
00:25:59,610 --> 00:26:02,360
Mela jekk inti stajt qatt riedu jagħmlu
lista bulleted, inti tista 'tagħmel dan.

592
00:26:02,360 --> 00:26:06,210
Jekk inti tixtieq li tkun super fancy u jagħmlu
lista ordnat, mhix lista unordered,

593
00:26:06,210 --> 00:26:10,170
bidla dawk li ol, rikarigu-paġna, u
issa l-browser se numru dan għalik.

594
00:26:10,170 --> 00:26:11,241
>> X'iktar nagħmlu?

595
00:26:11,241 --> 00:26:13,990
Well, koppja ta 'others-- jekk
inti stajt ltqajna paragrafi twal ta 'text--

596
00:26:13,990 --> 00:26:15,698
per eżempju, xi
Test Latin bħal this--

597
00:26:15,698 --> 00:26:20,730
u inti tixtieq li f'paragrafi separati,
p miftuħa, p qrib għall-paragrafu tag.

598
00:26:20,730 --> 00:26:22,010
U jagħmlu mill-ġdid u għal darb'oħra.

599
00:26:22,010 --> 00:26:26,600
U jekk I issa jiftħu dan il-fajl,
paragraphs.html, ukoll, dan

600
00:26:26,600 --> 00:26:27,570
huwa jkollna annoying.

601
00:26:27,570 --> 00:26:34,320
Allura issa ejja biss jmorru lura għall tiegħi
pront, chmod a + stilla r r .html--

602
00:26:34,320 --> 00:26:36,099
karta sbieħ selvaġġi ftit biex ngħidu hekk.

603
00:26:36,099 --> 00:26:37,890
Għandha tiffissa kollha
dawn il-problemi għalija.

604
00:26:37,890 --> 00:26:38,990
Ejja rikarigu.

605
00:26:38,990 --> 00:26:40,500
Hemm tliet paragrafi.

606
00:26:40,500 --> 00:26:42,930
>> U issa ejja imorru quddiem
u jiftħu ieħor.

607
00:26:42,930 --> 00:26:44,310
Kif madwar mejda?

608
00:26:44,310 --> 00:26:46,440
Int ser ikollok avviż mejda jistenna
ftit aktar kumplessa.

609
00:26:46,440 --> 00:26:49,110
Imma hija l-istess idea--
tag miftuħa, lametta miftuħ,

610
00:26:49,110 --> 00:26:51,360
miftuħa, miftuħa, miftuħa, lametta qrib, lametta miftuħ.

611
00:26:51,360 --> 00:26:54,410
U dawn jiġri toqgħod għal
tabella, li l-fruntieri hija apparentement

612
00:26:54,410 --> 00:26:58,500
ser ikun ħxuna 1-- x'ikun
li ringiela tabella means--, tabella

613
00:26:58,500 --> 00:27:00,320
data, li jfisser ċellola.

614
00:27:00,320 --> 00:27:03,840
U jekk immur lura lill-browser tiegħi
hawn u mur table.html,

615
00:27:03,840 --> 00:27:05,840
inti tista 'tara xi ħaġa
bħal dan, hideous.

616
00:27:05,840 --> 00:27:07,840
Iżda aħna ser jasal sal-punt
fejn nistgħu attwalment

617
00:27:07,840 --> 00:27:09,260
tagħmel affarijiet prettier minn dak.

618
00:27:09,260 --> 00:27:10,530
>> So let me jistipulaw għal issa.

619
00:27:10,530 --> 00:27:11,870
Hemm għenieqed ta 'tags aktar.

620
00:27:11,870 --> 00:27:15,225
U HTML huwa wunderbare li jittellgħu
għaliex, franchement, kull ma għandek bżonn tagħmel

621
00:27:15,225 --> 00:27:17,600
huwa tħares lejn paġni web eżistenti
li magħhom int familjari.

622
00:27:17,600 --> 00:27:20,340
U int simili, oh, li kif
huma għamlu dan estetikament.

623
00:27:20,340 --> 00:27:23,159
>> Jew inti tista 'tfittex up xi online
riżorsi kif HTML xogħlijiet,

624
00:27:23,159 --> 00:27:25,700
u tkun taf tara li hemm
vokabularju sħiħ ta 'tikketti oħrajn.

625
00:27:25,700 --> 00:27:30,110
Iżda mal-mudell mentali sempliċi
alone li kważi kull tabella inti tiftaħ

626
00:27:30,110 --> 00:27:33,620
għandha tingħalaq, huwa verament
ma biżżejjed biex jgħallmu lilu nnifsu

627
00:27:33,620 --> 00:27:36,950
HTML wara jifhmu
dawn l-ideat bażiċi ta 'tags

628
00:27:36,950 --> 00:27:40,520
u l-attributi u l-formedness tajjeb
li konna tkellimna dwar,

629
00:27:40,520 --> 00:27:44,697
xejn għeluq li nistgħu miftuħa
hekk li aħna ma jħawdu browser.

630
00:27:44,697 --> 00:27:46,780
Mela ejja issa tieħu dan
livell aktar interessanti

631
00:27:46,780 --> 00:27:48,100
billi tmur l-attwali.

632
00:27:48,100 --> 00:27:51,095
U ejja mur Mac tiegħi
hawn, biex google.com.

633
00:27:51,095 --> 00:27:52,280

634
00:27:52,280 --> 00:27:54,020
U issa notice-- ejja tagħmel dan.

635
00:27:54,020 --> 00:27:57,280
Jien gong biex tmur
Settings, Fittex Settings.

636
00:27:57,280 --> 00:28:01,070
Irrid li jduru off dan instant annoying
Ħaġa riżultati fejn immedjatament

637
00:28:01,070 --> 00:28:02,450
jibda jirrispondu għall ittajpjar tiegħek.

638
00:28:02,450 --> 00:28:05,300
Ejja nagħmlu din l-iskola anzjani hekk
aħna attwalment ara x'inhu għaddej.

639
00:28:05,300 --> 00:28:08,260
>> Hekk jien ser tiffranka tiegħi
Settings google hawn.

640
00:28:08,260 --> 00:28:11,160
U issa notice-- jien se
tfittxija għal xi ħaġa bħal qtates.

641
00:28:11,160 --> 00:28:14,500
U huwa għadu tagħmel auto
kompluta hawn, iżda bbażata fuq affarijiet

642
00:28:14,500 --> 00:28:15,970
nies ittajpjat fil-passat.

643
00:28:15,970 --> 00:28:17,490
Imma avviż x'inhu jiġri.

644
00:28:17,490 --> 00:28:20,272
>> Fil-URL fil-mument
huwa dan, biss google.com.

645
00:28:20,272 --> 00:28:22,650
U teknikament, huwa slash.

646
00:28:22,650 --> 00:28:25,910
Google biss iffrankar ta 'karattru
u ma juru lilna li.

647
00:28:25,910 --> 00:28:30,400
Huma qed juru us https, biss
li tkun super rassikuranti li aħna qed

648
00:28:30,400 --> 00:28:32,850
fi paġna sigur jew encrypted.

649
00:28:32,850 --> 00:28:35,690
>> So let me imorru quddiem u tfittxija għall-qtates.

650
00:28:35,690 --> 00:28:37,670
Issa dan ltqajna verament
kbira malajr.

651
00:28:37,670 --> 00:28:39,470
Ħares lejn it-tul ta 'dan il-URL.

652
00:28:39,470 --> 00:28:43,070
Iżda jirriżulta li ħafna mill dan il-għalf
fil-URL huwa attwalment pretty inutli.

653
00:28:43,070 --> 00:28:45,320
Jien ser tibda tħassar
affarijiet I ma jifhmux.

654
00:28:45,320 --> 00:28:46,560

655
00:28:46,560 --> 00:28:47,360
Nara qtates.

656
00:28:47,360 --> 00:28:48,470
Nifhem qtates.

657
00:28:48,470 --> 00:28:50,380
I do not know għaliex qtates huma hemmhekk mill-ġdid.

658
00:28:50,380 --> 00:28:52,620
I verament ma nafx
dak li dan nonsense huwa.

659
00:28:52,620 --> 00:28:56,030
Hekk jien biss se żżomm
tenfasizza u tħassar Jittieħed

660
00:28:56,030 --> 00:28:59,905
li jien ma jifhmux,
distillar il-URL fis biss dan.

661
00:28:59,905 --> 00:29:00,920

662
00:29:00,920 --> 00:29:02,270
>> Issa let me nikseb jidħlu mill-ġdid.

663
00:29:02,270 --> 00:29:03,814
Jidher qisu Google għadu jaħdem.

664
00:29:03,814 --> 00:29:06,980
Allura għal xi raġuni, dawn qed żżid
lott ta 'għalf għall-kontumaċja URL tagħhom.

665
00:29:06,980 --> 00:29:09,000
Iżda mhuwiex strettament meħtieġ.

666
00:29:09,000 --> 00:29:10,340
Allura dak li huwa sbieħ dwar dan?

667
00:29:10,340 --> 00:29:13,630
Well, let me imorru quddiem u
jiftħu Ispettur Chrome.

668
00:29:13,630 --> 00:29:15,960
Hemm shortcut ġurdien ftit għal dan.

669
00:29:15,960 --> 00:29:17,360
>> Mur għall-tab Network.

670
00:29:17,360 --> 00:29:19,340
U issa let me rikarigu
din il-paġna darba aktar.

671
00:29:19,340 --> 00:29:20,280
U jien azjenda Shift.

672
00:29:20,280 --> 00:29:22,520
Bħala twarrib, browsers
tendenza li cache jew ħlief

673
00:29:22,520 --> 00:29:24,697
informazzjoni biss għall-finijiet effiċjenza tal.

674
00:29:24,697 --> 00:29:27,280
Iżda ġeneralment, żamma Shift u
tagħbija mill-ġdid se seħħ kollox

675
00:29:27,280 --> 00:29:28,994
li tibda fuq mill-bidu.

676
00:29:28,994 --> 00:29:30,410
U dan huwa dak li nixtieq do hawnhekk.

677
00:29:30,410 --> 00:29:33,550
>> U avviż kollha ta 'dawn
ringieli li biss deher.

678
00:29:33,550 --> 00:29:37,920
Jirriżulta li fi kwalunkwe web partikolari
paġna, jista 'jkun hemm biss wieħed fajl

679
00:29:37,920 --> 00:29:43,500
involved-- hello.html-- jew hemm
jista 'jkun 52, bħal f'dan il-każ.

680
00:29:43,500 --> 00:29:45,820
Meta I żjara google.com,
apparentement, browser tiegħi

681
00:29:45,820 --> 00:29:49,650
kicks off 52 talbiet HTTP separati.

682
00:29:49,650 --> 00:29:50,520
Għaliex huwa li?

683
00:29:50,520 --> 00:29:53,380
>> Well, ħarsa lejn x'hemm ġewwa
ta 'din il-web-paġna top up.

684
00:29:53,380 --> 00:29:55,620
Hemm mhux biss it-test,
iżda hemm immaġini attwali

685
00:29:55,620 --> 00:29:57,130
tal-qtates aktar lejn il-lemin.

686
00:29:57,130 --> 00:29:59,110
Hemm logo mlewna up hawn fuq xellug.

687
00:29:59,110 --> 00:30:01,750
Hemm kollha ta 'dawn ikoni
għal mikrofonu u ibqa 'sejjer hekk.

688
00:30:01,750 --> 00:30:05,130
Hemm ħafna ta 'biċċiet, il-bini
blokki, biċċiet scratch, jekk inti se,

689
00:30:05,130 --> 00:30:06,250
għal din il-paġna web.

690
00:30:06,250 --> 00:30:10,310
U dak il-browser qed tagħmel fuq
jkollna l-ewwel fajl, li

691
00:30:10,310 --> 00:30:16,180
huwa dan ringiela hawnhekk, huwa essenzjalment
mtennija matul il-quċċata HTML

692
00:30:16,180 --> 00:30:19,880
għal isfel, xellug għal-lemin, tfittex
affarijiet simili tags immaġni jew tikketti oħra

693
00:30:19,880 --> 00:30:23,160
li huma jsemmu fajls oħra u
meta jarhom, tmur u fetches minnhom

694
00:30:23,160 --> 00:30:26,050
permezz HTTP, sħaħ vijabbli
metafora pakkett,

695
00:30:26,050 --> 00:30:29,670
u mbagħad turihom fil-
post xieraq fil-web page.

696
00:30:29,670 --> 00:30:33,370
>> Imma avviż hawn jekk I tiffoka fuq
l-ewwel qtates tarmi, tfittxija,

697
00:30:33,370 --> 00:30:37,090
avviż li, tabilħaqq huwa tuża HTTP 1.1.

698
00:30:37,090 --> 00:30:41,690
U sfortunatament, Google
Chrome dritt issa fil-verżjoni 39

699
00:30:41,690 --> 00:30:45,110
huwa tip ta 'affarijiet dumbing isfel u
ma juru us-headers attwali.

700
00:30:45,110 --> 00:30:49,680
Imma dak li kien tabilħaqq bagħtu hija talba
għal mhux mmejla, iżda / tfittxija? q = qtates.

701
00:30:49,680 --> 00:30:52,830

702
00:30:52,830 --> 00:30:54,340
>> Issa, għaliex huwa li importanti?

703
00:30:54,340 --> 00:30:57,110
Well, jien ser jiddeduċu
minn dan li jekk inti Google

704
00:30:57,110 --> 00:31:01,520
jappoġġja mistoqsijiet ta 'din il-formola, għaliex
ma I jimplimenta tfittxija tiegħi stess

705
00:31:01,520 --> 00:31:06,420
magna għall CS50, iżda biss il-quddiem
aħħar, biss l-user interface grafika.

706
00:31:06,420 --> 00:31:09,610
U aħna ser jesternalizzaw l-aħħar lura,
it-tfittxija attwali riżultati lill-Google.

707
00:31:09,610 --> 00:31:10,510
>> Allura kif nista 'nagħmlu dan?

708
00:31:10,510 --> 00:31:13,820
Well, let me go fis gedit hawn fuq.

709
00:31:13,820 --> 00:31:19,180
U let me imorru quddiem u tiftaħ
up, ejja ngħidu, fajl ġdid.

710
00:31:19,180 --> 00:31:22,280
U jien ser tiffranka din
temporanjament bħala tfittxija 0.html.

711
00:31:22,280 --> 00:31:25,111

712
00:31:25,111 --> 00:31:27,860
U mbagħad eventwalment, aħna ser malajr
ħerqa l-wieħed I mħejjija minn qabel.

713
00:31:27,860 --> 00:31:30,190
>> U jien ser
malajr Whip up tip dok

714
00:31:30,190 --> 00:31:33,840
html html bracket miftuħa
html bracket qrib.

715
00:31:33,840 --> 00:31:38,390
Imbagħad Jien ser tagħmel ras
ras qrib titolu miftuħa CS50

716
00:31:38,390 --> 00:31:40,150
Fittex minflok Google search.

717
00:31:40,150 --> 00:31:43,480
Down hawn jien ser ikollhom
il-korp, korp stabbiliti hawn qrib.

718
00:31:43,480 --> 00:31:45,835
U issa għandi bżonn CS50 Fittex.

719
00:31:45,835 --> 00:31:47,710
U fil-fatt, ejja
jibnu din inkrementali.

720
00:31:47,710 --> 00:31:51,043
Jien ser jimxi 'l quddiem u jagħlqu dan u
attwalment poġġih fil f'direttorju pubbliku tiegħi.

721
00:31:51,043 --> 00:31:52,730
Allura tagħti me wieħed biss mument.

722
00:31:52,730 --> 00:31:55,390
tfittxija 0.html-- jien ser
temporalment sejħa hija search.html.

723
00:31:55,390 --> 00:31:56,600

724
00:31:56,600 --> 00:31:59,750
Jien ser chmod hu search.html + r.

725
00:31:59,750 --> 00:32:01,072

726
00:32:01,072 --> 00:32:02,280
U issa jien ser tiftħu.

727
00:32:02,280 --> 00:32:03,224

728
00:32:03,224 --> 00:32:04,390
Kull dritt, hekk li kien mgħaġġel.

729
00:32:04,390 --> 00:32:06,800
Iżda l-għan sempliċement kienet
biex nikseb us sal-punt

730
00:32:06,800 --> 00:32:09,630
ta 'wara dan it-test
fajl imsejħa search.html.

731
00:32:09,630 --> 00:32:10,940

732
00:32:10,940 --> 00:32:12,790
Hekk mhux wisq li tħares lejn s'issa.

733
00:32:12,790 --> 00:32:16,970
Tabilħaqq, jekk immur browser tiegħi, u
mur search.html, li kollox huwa.

734
00:32:16,970 --> 00:32:17,720
Imma inti taf liema?

735
00:32:17,720 --> 00:32:19,000
I tista 'tkun ftit fancier.

736
00:32:19,000 --> 00:32:22,710
I jaqra fi ktieb li hemm
intestatura tag imsejjaħ H1.

737
00:32:22,710 --> 00:32:26,100
U jien ser jimxi 'l quddiem u
tuża dak h1 miftuħ u h1 qrib.

738
00:32:26,100 --> 00:32:27,220
Rikarigu-paġna.

739
00:32:27,220 --> 00:32:29,600
U issa huwa akbar u aktar kuraġġuża,
mhux kollha li interessanti,

740
00:32:29,600 --> 00:32:32,399
iżda mill-inqas strutturalment
aktar interessanti.

741
00:32:32,399 --> 00:32:33,940
Imma issa let me jintroduċu tag ieħor.

742
00:32:33,940 --> 00:32:36,500
Jirriżulta hemm forma tag.

743
00:32:36,500 --> 00:32:38,400
U let me qrib dik tag.

744
00:32:38,400 --> 00:32:40,830
U jirriżulta hemm
tag ta 'input li

745
00:32:40,830 --> 00:32:44,600
għandha attribut imsejħa tip, li
huwa t-tip tad-data tal-qasam,

746
00:32:44,600 --> 00:32:45,200
jekk inti se.

747
00:32:45,200 --> 00:32:47,050
U se tkun ta 'test tip.

748
00:32:47,050 --> 00:32:52,200
U l-valur tagħha huwa għaddej
li tkun CS50 Fittex.

749
00:32:52,200 --> 00:32:53,850
Tag qrib.

750
00:32:53,850 --> 00:32:57,100
U hemm għaddej li jkun hemm ebda kunċett ta '
ftuħ u l-għeluq ma tags separati.

751
00:32:57,100 --> 00:33:00,300
>> Let me jmorru lura hawn fuq u
tara x'inhu għaddej, rikarigu.

752
00:33:00,300 --> 00:33:01,380
Getting interessanti.

753
00:33:01,380 --> 00:33:02,950
Jidher qisu dan huwa qasam tat-test.

754
00:33:02,950 --> 00:33:04,080

755
00:33:04,080 --> 00:33:06,999
U fil-fatt, I ma riedx
li nagħtu valur wasalniex.

756
00:33:06,999 --> 00:33:10,040
Let me jmorru lura hawn u fil-fatt tikseb
rid ta 'dan il-valur li jżommha sempliċi.

757
00:33:10,040 --> 00:33:12,939
Minflok valur, dak li ridt
li jagħti dan ħaġa kien isem.

758
00:33:12,939 --> 00:33:15,230
U jien ma nafx dak li hi,
so I ser jiġu lura għal dak.

759
00:33:15,230 --> 00:33:18,270
>> Iżda taħt dak, nixtieq
tagħmel tip input = jissottomettu.

760
00:33:18,270 --> 00:33:19,840

761
00:33:19,840 --> 00:33:22,120
U dan il-valur se jkun CS50 Fittex.

762
00:33:22,120 --> 00:33:24,850
U aħna ser tara għaliex I
għamel il-valur għal dan.

763
00:33:24,850 --> 00:33:28,900
Meta I rikarigu, I jidhru li issa għandhom
l-bidu ta 'tfittxija tiegħi stess

764
00:33:28,900 --> 00:33:30,820
magna, super hideous,
għalkemm franchement, huwa

765
00:33:30,820 --> 00:33:34,260
mhux tarmi l bogħod minn dak
Paġna Google default Dehra.

766
00:33:34,260 --> 00:33:37,950
>> Jekk immur hawn issa, I tista 'tip
qtates u nisperaw kklikkja Search.

767
00:33:37,950 --> 00:33:40,380
Imma jien ma pjuttost isir s'issa,
minħabba I ma implimentawx,

768
00:33:40,380 --> 00:33:41,045
ovvjament, database.

769
00:33:41,045 --> 00:33:42,940
I ma crawled il-
web għal riżultati tat-tiftix.

770
00:33:42,940 --> 00:33:44,840
So I bżonn li jesternalizzaw li biex Google.

771
00:33:44,840 --> 00:33:46,290
Allura kif nista 'nagħmlu dan?

772
00:33:46,290 --> 00:33:49,170
>> Ukoll, l-ewwel nett I
bżonn li jiżdiedu u l-azzjoni

773
00:33:49,170 --> 00:33:58,460
tattribwixxi lil forma tag tiegħi li
huwa http://www.google.com/search.

774
00:33:58,460 --> 00:34:01,180
U naf li biss milli jkollhom
dedotta billi tħares mill-qrib

775
00:34:01,180 --> 00:34:02,505
fil URL tagħhom.

776
00:34:02,505 --> 00:34:03,380
U issa tieħu raden.

777
00:34:03,380 --> 00:34:09,090
X'għandu dan il-qasam it-test probabbilment
jiġi msejjaħ, ibbażata fuq fejn aħna daħal

778
00:34:09,090 --> 00:34:09,754
minn qabel?

779
00:34:09,754 --> 00:34:11,896

780
00:34:11,896 --> 00:34:13,290
>> UDJENZA:? Q.

781
00:34:13,290 --> 00:34:14,370
>> DAVID J Malan:? Q.

782
00:34:14,370 --> 00:34:17,800
U aħna ma attwalment bżonn kwistjoni
trade mark jirriżulta, iżda q hija tabilħaqq,

783
00:34:17,800 --> 00:34:20,489
q għal mistoqsija probabbilment mill
default, sempliċement minħabba li l-

784
00:34:20,489 --> 00:34:23,060
dak Larry u Sergey
ħarāet ma 'snin ilu.

785
00:34:23,060 --> 00:34:24,739
Allura issa let me Reload this Page.

786
00:34:24,739 --> 00:34:26,409
Hija ma tfittex kollha li differenti.

787
00:34:26,409 --> 00:34:28,120
Imma issa watch x'jiġri.

788
00:34:28,120 --> 00:34:32,360
>> Jekk tip I fil-qtates u ikklikkja
CS50 Fittex u itlaq,

789
00:34:32,360 --> 00:34:35,770
Avviż niġi whisked
bogħod biex attwali Google.

790
00:34:35,770 --> 00:34:38,150
Issa, Google qed ftit
tedjanti fil li dawn qed

791
00:34:38,150 --> 00:34:41,877
jpoġġu parametru addizzjonali,
jekk inti se, għall-URL.

792
00:34:41,877 --> 00:34:43,960
Li kollox jiġri
awtomatikament fuq il-ġenb Google.

793
00:34:43,960 --> 00:34:48,730
>> Il-parti importanti huwa li I jidhru
li ġġeneraw din it-talba hawn.

794
00:34:48,730 --> 00:34:50,179
U fil-fatt, dan huwa dak li jiġri.

795
00:34:50,179 --> 00:34:53,040
Meta inti għandek HTML li
tidher bħal dan, dan

796
00:34:53,040 --> 00:34:57,620
huwa tip ta iżviluppaturi tal-web notazzjoni
biex tgħid, imorru quddiem u joħloq forma

797
00:34:57,620 --> 00:34:59,990
li meta huwa sottomess,
li għaddej biex tmur dan il-URL.

798
00:34:59,990 --> 00:35:03,430
U meta l-URL pprovda
Valuri għal affarijiet bħall-q,

799
00:35:03,430 --> 00:35:05,440
ma jmorrux biss biex dan il-URL.

800
00:35:05,440 --> 00:35:08,210
Attwalment, mur għall-mistoqsija
marka u mbagħad q = qtates.

801
00:35:08,210 --> 00:35:09,590

802
00:35:09,590 --> 00:35:13,060
Tehmeż il-parametru, il-
Parametru HTTP bħal dik.

803
00:35:13,060 --> 00:35:15,590
>> U biss sabiex ikunu super preċiża,
dak li qed dedott here--

804
00:35:15,590 --> 00:35:18,130
imma jien ser tkun aktar explicit-- huwa
li l-metodu nixtieq li jużaw

805
00:35:18,130 --> 00:35:22,270
hu li tikseb, minflok xi ħaġa bħal
post, li aħna ser eventwalment tara.

806
00:35:22,270 --> 00:35:27,710
Allura fil-qosor, sempliċiment billi fehim
HTML u tuża xi tags pjuttost sempliċi,

807
00:35:27,710 --> 00:35:30,610
aħna issa tista 'tibda biex joħolqu
utent tagħna stess tarf ta 'quddiem

808
00:35:30,610 --> 00:35:32,850
interface ma 'tfittxija
magna warajh.

809
00:35:32,850 --> 00:35:34,800
>> Iżda dan naturalment, huwa pjuttost hideous.

810
00:35:34,800 --> 00:35:37,259
So let me attwalment jiftħu
verżjoni kemmxejn aħjar.

811
00:35:37,259 --> 00:35:39,800
Dan huwa l-waħda I ippreparat
javvanzaw li għandha xi kummenti.

812
00:35:39,800 --> 00:35:41,900
Imma inti taf tara li I
pretty ħafna recreated dan.

813
00:35:41,900 --> 00:35:44,150
Allura dan huwa diġà disponibbli online.

814
00:35:44,150 --> 00:35:48,050
U jien ma jiġri preemptively
mur https biss biex jżommha sempliċi.

815
00:35:48,050 --> 00:35:50,610
>> U issa ejja tiftaħ
iterazzjoni li jmiss ta 'dan.

816
00:35:50,610 --> 00:35:52,510
Hija l-verżjoni 1 minflok ta '0.

817
00:35:52,510 --> 00:35:55,315
Liema jumps fil inti bħala ftit
differenti f'dan l-eżempju?

818
00:35:55,315 --> 00:35:59,480

819
00:35:59,480 --> 00:36:00,440
>> UDJENZA: [inaudible].

820
00:36:00,440 --> 00:36:03,020
>> Yeah, hemm dan iċ-ċentru jallinjaw it-test.

821
00:36:03,020 --> 00:36:04,590
Dan huwa ftit stramb up here.

822
00:36:04,590 --> 00:36:06,150
Iżda din hija tabilħaqq ġdida.

823
00:36:06,150 --> 00:36:07,800
U forsi raden x'inhu jiġri.

824
00:36:07,800 --> 00:36:11,730
Jekk mmur browser tiegħi issa
u żur tfittxija 1.html,

825
00:36:11,730 --> 00:36:13,090
huwa kważi l-istess ħaġa.

826
00:36:13,090 --> 00:36:15,705
Imma hija pass eqreb lejn
tkun ftit aktar pretty.

827
00:36:15,705 --> 00:36:19,150
Huwa għadu ikrah, iżda prettier f'dak
inqas kollox issa s ċċentrata.

828
00:36:19,150 --> 00:36:23,470
>> Għalhekk jirriżulta li dak li jien jużaw
hija lingwa oħra għal kollox imsejħa

829
00:36:23,470 --> 00:36:25,680
CSS, folji stil cascading.

830
00:36:25,680 --> 00:36:28,310
U CSS, franchement, huwa tip
ta ', fl-opinjoni personali tiegħi,

831
00:36:28,310 --> 00:36:29,775
lingwa atrociously mfassla.

832
00:36:29,775 --> 00:36:33,110
Huwa ħafna annoying li tiftakar
Id-dettalji kollha varji.

833
00:36:33,110 --> 00:36:38,479
Iżda huwa dak stylizes l
illum web kollu dinjija.

834
00:36:38,479 --> 00:36:39,270
I reċidiv xi ħadd.

835
00:36:39,270 --> 00:36:39,769
Kull dritt.

836
00:36:39,769 --> 00:36:43,180
Mela ejja jmorru lura hawn u tara
kif aħna qed attwalment jużaw dan.

837
00:36:43,180 --> 00:36:45,940
U jirriżulta, mill-inqas huwa
attwalment lingwa pjuttost sempliċi.

838
00:36:45,940 --> 00:36:49,470
Huwa biss pari b'valur ewlenin, proprjetajiet
u l-valuri, il-proprjetajiet u l-valuri.

839
00:36:49,470 --> 00:36:52,080
Tabilħaqq, hawnhekk huwa wieħed
dik il-proprjetà u l-valur.

840
00:36:52,080 --> 00:36:55,890
>> Sempliċiment bl-użu l-istil
attribut fuq tag ġisem tiegħi

841
00:36:55,890 --> 00:37:00,360
u jtuha valur ta '
kolon kelma u kelma oħra,

842
00:37:00,360 --> 00:37:03,730
jew proprjetà u valur,
I jistgħu jaffettwaw l-estetika

843
00:37:03,730 --> 00:37:06,210
tal-paġna tal-web, ma
neċessarjament l-istruttura għadhom,

844
00:37:06,210 --> 00:37:07,550
iżda l-estetika ta 'dan.

845
00:37:07,550 --> 00:37:10,960
U biss mill Googling madwar, I realizzata
li l-folji CSS, stil cascading,

846
00:37:10,960 --> 00:37:14,170
jappoġġja proprjetà msejħa
test għall allinjament, li l-valur jista '

847
00:37:14,170 --> 00:37:16,980
jitħalla, id-dritt, jew ċentru, per eżempju.

848
00:37:16,980 --> 00:37:19,990
>> Allura issa meta I rikarigu
din il-paġna, dak I ma jiksbu

849
00:37:19,990 --> 00:37:22,730
kien paġna ċċentrata,
iżda xorta pretty ikrah.

850
00:37:22,730 --> 00:37:25,770
Ejja imorru quddiem u tiftaħ
up-verżjoni 2 tal Search.

851
00:37:25,770 --> 00:37:28,570
U issa avviż jien ghamilt ftit aktar.

852
00:37:28,570 --> 00:37:33,760
Avviż li up here ġewwa tar-ras
tag, jista 'jkun hemm aktar minn titolu.

853
00:37:33,760 --> 00:37:35,400
Fil-fatt, hemm tag stil.

854
00:37:35,400 --> 00:37:38,630
U dan huwa fejn biss gets a
ftit CSS jaraw messy kultant.

855
00:37:38,630 --> 00:37:41,971
>> Avviż li I jidhru li jkollhom xi ħaġa
li strutturalment jistenna differenti ħafna.

856
00:37:41,971 --> 00:37:44,095
Iżda hawnhekk huwa l-isem ta '
l-tikketta Irrid stilizzata.

857
00:37:44,095 --> 00:37:47,570
Hawnhekk huma ħbieb antiki tagħna kaboċċi
braces u Brace kaboċċi magħluqa.

858
00:37:47,570 --> 00:37:50,290
U allura hawnhekk hija li
proprjetà u l-valur tagħha.

859
00:37:50,290 --> 00:37:56,300
>> Jekk I tagħbija dan il-fajl, search2.html,
ir-riżultat aħħari huwa identiku.

860
00:37:56,300 --> 00:37:59,300
Imma hija pass lejn tfassil aħjar.

861
00:37:59,300 --> 00:38:04,560
Billi factoring out dan CSS, stajt
mhux mħallta ma HTML tiegħi.

862
00:38:04,560 --> 00:38:07,560
U fil-fatt, kif Ser naraw, I jistgħu
użu mill-ġdid dawn il-proprjetajiet u l-valuri.

863
00:38:07,560 --> 00:38:10,420
Jekk jien ridt li jagħmlu għenieqed ta '
partijiet ta 'paġna tal-web tiegħi ċċentrata,

864
00:38:10,420 --> 00:38:13,630
I ma għandek tip stil = test-allinjament
ċentru kollha fuq il-post.

865
00:38:13,630 --> 00:38:16,580
I tista 'tpoġġi f'post wieħed
forsi, bħall up fil-quċċata.

866
00:38:16,580 --> 00:38:18,210
>> Iżda anke dan mhuwiex l-aħjar disinn.

867
00:38:18,210 --> 00:38:21,720
Fil-fatt, waħda mill-affarijiet li inti ser jitgħallmu
kif inti jonfqu aktar u aktar ħin mal-

868
00:38:21,720 --> 00:38:25,730
programmazzjoni web huwa li l-aktar inti tista '
modularize affarijiet u affarijiet fattur out

869
00:38:25,730 --> 00:38:30,610
bħal fajls .h ejjew Jittieħed fattur out,
simili helpers.c Ejjew affarijiet fattur out

870
00:38:30,610 --> 00:38:31,880
xi psets ftit ilu.

871
00:38:31,880 --> 00:38:34,200
Bl-istess mod, jista aħna
tixtieq li jinkiseb dan.

872
00:38:34,200 --> 00:38:37,920
>> Allura avviż fil-verżjoni
tlieta mill search.html stajt

873
00:38:37,920 --> 00:38:40,610
mnaddfa-kap ta '
il-paġna u biss jitqiegħed

874
00:38:40,610 --> 00:38:43,320
f'dan, tikketta rabta, li
kuntrarju għall-isem,

875
00:38:43,320 --> 00:38:44,700
ma jtik hyperlink.

876
00:38:44,700 --> 00:38:49,150
Hija links għal fajl ieħor permezz ta '
l href li l-valur f'dan il-każ,

877
00:38:49,150 --> 00:38:51,586
huwa tfittxija 3.css

878
00:38:51,586 --> 00:38:52,960
So I realizzata aħna qed tmur malajr.

879
00:38:52,960 --> 00:38:54,600
Iżda kollha li qed nagħmel huwa tip
ta 'affarijiet li jiċċaqalqu madwar.

880
00:38:54,600 --> 00:38:55,760
Let me miftuħa tfittxija 3.css.

881
00:38:55,760 --> 00:38:57,114

882
00:38:57,114 --> 00:38:58,530
Hemm hu, xejn verament lilha.

883
00:38:58,530 --> 00:39:02,270
I biss kkupjati u pasted hija fis ġdid
fajl, ferm simili aħna f'fatturi Jittieħed out

884
00:39:02,270 --> 00:39:03,509
ġewwa fajls oħra qabel.

885
00:39:03,509 --> 00:39:05,300
U l-result--
kompletament underwhelming--

886
00:39:05,300 --> 00:39:06,730
se tkun eżattament l-istess.

887
00:39:06,730 --> 00:39:10,490
Iżda aħna qed jiċċaqilqu toward-- ebda, mhuwiex.

888
00:39:10,490 --> 00:39:11,930
Oh, I know għaliex.

889
00:39:11,930 --> 00:39:13,790
>> Għalhekk jidher li jkun bug.

890
00:39:13,790 --> 00:39:15,010
U huwa f'xi sens.

891
00:39:15,010 --> 00:39:17,730
Iżda let me tiftaħ tab Network tiegħi.

892
00:39:17,730 --> 00:39:19,660
Let me rikarigu-paġna.

893
00:39:19,660 --> 00:39:23,315
Ah, għaliex hi l-CSS ma jiġux applikati?

894
00:39:23,315 --> 00:39:26,920
Ukoll, il-fajl CSS, b'mod simili, għandha
li tkun dinja tinqara, biex ngħidu hekk.

895
00:39:26,920 --> 00:39:28,440
U wisq bħalissa pprojbit.

896
00:39:28,440 --> 00:39:33,760
So let me do chmod a + R
ta 'star dot CSS-- whoops--

897
00:39:33,760 --> 00:39:37,067
aħna qed dot CSS huwa biss il-
fajl estensjoni għall-fajls CSS.

898
00:39:37,067 --> 00:39:38,900
Issa let me jmorru lura għal
browser tiegħi u rikarigu.

899
00:39:38,900 --> 00:39:40,910
OK, ftit aħjar.

900
00:39:40,910 --> 00:39:42,282
>> Issa let me do aħħar ħaġa waħda.

901
00:39:42,282 --> 00:39:42,990
Fit-tfittxija-4.html.

902
00:39:42,990 --> 00:39:44,550

903
00:39:44,550 --> 00:39:48,220
I jkollhom verżjoni li I maħsub biss
kien mod cooler, għalkemm b'mod aktar

904
00:39:48,220 --> 00:39:48,980
kkumplikata.

905
00:39:48,980 --> 00:39:50,690
Ejja nħarsu lejn ir-riżultat ewwel.

906
00:39:50,690 --> 00:39:52,290
Jagħlqu dan biex tagħtina aktar spazju.

907
00:39:52,290 --> 00:39:54,275
Tbiddel dan tiftix-4, Ikteb.

908
00:39:54,275 --> 00:39:55,430

909
00:39:55,430 --> 00:39:57,200
>> U issa mazz ta 'affarijiet huma mqassma.

910
00:39:57,200 --> 00:39:59,910
Jien se jmorru lura
fis direttorju tiegħi hawn.

911
00:39:59,910 --> 00:40:04,190
U issa jien biss se jagħmlu
a chmod ta '+ r fuq file--

912
00:40:04,190 --> 00:40:07,450
għaliex naf li exists-- msejjaħ
logo.gif, li hija immaġni.

913
00:40:07,450 --> 00:40:08,590
U issa rikarigu.

914
00:40:08,590 --> 00:40:11,040
U wow-- hekk issa jien
pjuttost qrib, franchement,

915
00:40:11,040 --> 00:40:15,860
li bħall-verżjoni 1999 ta 'Google, u
franchement, il-verżjoni 2014 ta 'Google,

916
00:40:15,860 --> 00:40:16,360
dritt?

917
00:40:16,360 --> 00:40:21,920
>> Allura issa għaddej għall-websajt tagħhom,
finalment, jekk I tfittxija għall-qtates.

918
00:40:21,920 --> 00:40:23,900
U tabilħaqq huwa.

919
00:40:23,900 --> 00:40:26,410
Imma dak li ma nagħmel differenti
f'dan il-verżjoni 4?

920
00:40:26,410 --> 00:40:28,020
Allura aħna mhux se nitkellem wisq fuq it here.

921
00:40:28,020 --> 00:40:30,100
Int ser ikollok tara dan fil-problema
sett seba eventwalment.

922
00:40:30,100 --> 00:40:31,350
Imma avviż Jien għamilt ftit affarijiet.

923
00:40:31,350 --> 00:40:33,690
>> I introduċiet div
tag, li hija diviżjoni,

924
00:40:33,690 --> 00:40:35,450
simili fl-ispirtu għal paragrafu tag.

925
00:40:35,450 --> 00:40:38,220
Iżda diviżjoni huwa bħad, hawn
reġjun inviżibbli rettangolari

926
00:40:38,220 --> 00:40:39,150
tal-iskrin.

927
00:40:39,150 --> 00:40:41,680
Ejja tagħtiha unika
identifikatur, footer, biss

928
00:40:41,680 --> 00:40:44,700
sabiex inkunu nistgħu nitkellmu dwar
fil HTML tagħna x'imkien ieħor.

929
00:40:44,700 --> 00:40:47,952
Hawnhekk huwa div ieħor tal-paġna
li ID se tkun kontenut.

930
00:40:47,952 --> 00:40:49,160
Hu l-kontenut tal-paġna.

931
00:40:49,160 --> 00:40:51,090
U sa hawn huwa l-header tal-paġna.

932
00:40:51,090 --> 00:40:54,960
>> Fi kliem ieħor, stajt
essenzjalment fil HTML am mentalment

933
00:40:54,960 --> 00:40:57,700
viewing din il-paġna web bħala
tliet komponenti, header

934
00:40:57,700 --> 00:41:01,200
up here ma dan ir-rettangolu inviżibbli,
il-kontenut fin-nofs, u mbagħad

935
00:41:01,200 --> 00:41:04,800
l-footer stabbiliti hawn taħt, anke
jekk aħna ma tara dawk l-affarijiet.

936
00:41:04,800 --> 00:41:09,940
Għaliex nixtieq li fil my head tal
paġna hawn, jew fajl .css,

937
00:41:09,940 --> 00:41:11,460
I jistgħu jużaw dan sintassi.

938
00:41:11,460 --> 00:41:13,070
>> Header mhix tag.

939
00:41:13,070 --> 00:41:17,060
Huwa ta 'ID hekk jirriżulta
li billi tagħmel #header,

940
00:41:17,060 --> 00:41:20,840
I issa jistgħu japplikaw waħda jew aktar
proprjetajiet għall-header.

941
00:41:20,840 --> 00:41:24,130
I tista 'tagħmel l-istess kontenut,
l-istess għall-kontenut hawn.

942
00:41:24,130 --> 00:41:27,230
>> Allura per eżempju, fil-footer, avviż
kollha ta 'dawn il-proprjetajiet jien żżid.

943
00:41:27,230 --> 00:41:30,660
U naf dawn jeżistu biss mill-qari
up fuq id-dokumentazzjoni għal CSS.

944
00:41:30,660 --> 00:41:33,450
Daqs tat-tipa se tkun smaller--
għalhekk xi daqs tat-tipa relattiv.

945
00:41:33,450 --> 00:41:34,741
Il-piż se tkun kuraġġużi.

946
00:41:34,741 --> 00:41:37,340
Margin-- kemm pixels
madwar it-- huwa ta '20 pixels.

947
00:41:37,340 --> 00:41:38,590
U li għaddej biex jiġu ċċentrata.

948
00:41:38,590 --> 00:41:40,256
>> Imma issa dritt, il-paġna tidher bħal dan.

949
00:41:40,256 --> 00:41:42,840
Jekk jien ma kuntent bl
Kopja tiegħi hemm dritt,

950
00:41:42,840 --> 00:41:46,560
I jistgħu jagħmlu xi ħaġa simili kulur aħmar.

951
00:41:46,560 --> 00:41:50,570
U mbagħad I tista 'tiffranka dan, rikarigu,
u issa stajt stilizzata l footer.

952
00:41:50,570 --> 00:41:54,130
Allura dan huwa biss ssemmi fil-power
ta 'dak li inti tista' tagħmel fil-paġna web

953
00:41:54,130 --> 00:41:55,510
biex ibiddlu l-affarijiet madwar.

954
00:41:55,510 --> 00:41:59,080
>> U anke cooler minn dan, jekk inti tixtieq
poke madwar ma 'websajts attwali,

955
00:41:59,080 --> 00:42:00,810
inti ma tistax b'mod permanenti bidla minnhom.

956
00:42:00,810 --> 00:42:03,640
Imma jekk jien jiftħu
Spettur Chrome darb'oħra

957
00:42:03,640 --> 00:42:07,610
u mmur mhux għall-naħa tax-xellug
hawn, li turi HTML Facebook,

958
00:42:07,610 --> 00:42:11,380
iżda juri fuq il-lemin
naħa kollha ta 'CSS tagħha,

959
00:42:11,380 --> 00:42:13,789
inti tista 'jew u
ibiddlu l-affarijiet fuq il-fly.

960
00:42:13,789 --> 00:42:15,080
So let me go quddiem u tagħmel dan.

961
00:42:15,080 --> 00:42:18,670
>> Let me imorru quddiem u l-kontroll
ikklikkja fuq din il-kelma każwali hawn,

962
00:42:18,670 --> 00:42:21,230
jiffirmaw, u kklikkja Spezzjona Element.

963
00:42:21,230 --> 00:42:25,130
Chrome konvenjenti ħafna jumps biex
l-tikketta H1 li Facebook qed tuża.

964
00:42:25,130 --> 00:42:27,290
U avviż hawn Facebook
għandu tip ta 'lazily

965
00:42:27,290 --> 00:42:29,960
hard kodifikati daqs tat-tipa bħala proprjetà hawn.

966
00:42:29,960 --> 00:42:33,530
>> Allura l-ħaġa jibred għalkemm huwa
li jekk I attwalment tmur fil hawn

967
00:42:33,530 --> 00:42:39,560
u jgħidu, oh, Facebook, I ma simili li
64 pixels, aħna issa jistgħu jbiddlu Facebook.

968
00:42:39,560 --> 00:42:42,590
Of course, aħna qed jinbidlu biss
għalija personalment fil-mument.

969
00:42:42,590 --> 00:42:45,150
Iżda din hija biss ieħor
għodda kit għodda tagħna

970
00:42:45,150 --> 00:42:48,360
li għaddej biex inessu tweak
u ċifra barra u wkoll jiddijanjosaw

971
00:42:48,360 --> 00:42:49,729
kwistjonijiet fil-paġni web tagħna stess.

972
00:42:49,729 --> 00:42:52,270
U nistgħu simili tmur fuq
hawnhekk, li huwa l-istess ħaġa.

973
00:42:52,270 --> 00:42:55,830
Jekk int verament tixtieq tikseb fancy, I
mean, issa inti tista 'verament jindiblu il-paġna

974
00:42:55,830 --> 00:42:57,380
u jagħmlu affarijiet crazy.

975
00:42:57,380 --> 00:42:59,870
>> Allura għaliex din hija kollha utli?

976
00:42:59,870 --> 00:43:02,330
Well, finalment, aħna qed
ser trid tkun

977
00:43:02,330 --> 00:43:07,110
kapaċi joħolqu paġni web li
huma misjuqa minn truf lura tagħna stess,

978
00:43:07,110 --> 00:43:10,520
mhux bi ftit Google u
esternalizzazzjoni-aħħar lura hemmhekk.

979
00:43:10,520 --> 00:43:13,510
Aħna fil-fatt tixtieq l-
valur, per eżempju,

980
00:43:13,510 --> 00:43:18,830
ta 'azzjoni search engine tagħna
tattribwixxi lil jmorru ma xi ħadd ieħor,

981
00:43:18,830 --> 00:43:24,270
iżda għal xi ħaġa bħal search.php,
fejn search.php huwa fuq server tagħna stess,

982
00:43:24,270 --> 00:43:25,670
mhux fuq xi ħadd ieħor.

983
00:43:25,670 --> 00:43:30,316
>> U hekk li naslu s'hemm, aħna fil-fatt
ħtieġa li tiġi introdotta lingwa ġdida.

984
00:43:30,316 --> 00:43:33,190
Allura aħna stajt diġà ħares lejn waħda ġdida
lingwa hawn, jew tnejn verament, HTML

985
00:43:33,190 --> 00:43:33,700
u CSS.

986
00:43:33,700 --> 00:43:36,330
Imma dawn huma tassew ftit
lingwi strutturali u estetiċi.

987
00:43:36,330 --> 00:43:38,360
Dawn mhux qed programmazzjoni
lingwi per se.

988
00:43:38,360 --> 00:43:41,160
U li dwar kemm formali
żmien kif aħna ser jonfqu fuqhom.

989
00:43:41,160 --> 00:43:44,910
Għaliex aħna ser tibda issa
biex jgħaddi għal PHP.

990
00:43:44,910 --> 00:43:48,160
>> Allura PHP hija attwali
lingwa ta 'programmar.

991
00:43:48,160 --> 00:43:50,750
Huwa lingwa scripting
fis-sens li huwa

992
00:43:50,750 --> 00:43:52,855
maħsub li jkun ta 'piż eħfef
minn xi ħaġa bħal C.

993
00:43:52,855 --> 00:43:56,082
U huwa lingwa interpretat,
li jfisser mhuwiex ikkompilati.

994
00:43:56,082 --> 00:43:58,790
Allura fil-qosor, dak li ma jfisser
meta aħna użati lingwa bħal c

995
00:43:58,790 --> 00:44:00,290
u kellna biex jikkompilaw dan?

996
00:44:00,290 --> 00:44:02,120
Dak ma jfisser li
jikkompilaw kodiċi sors C?

997
00:44:02,120 --> 00:44:03,864

998
00:44:03,864 --> 00:44:04,780
UDJENZA: [inaudible].

999
00:44:04,780 --> 00:44:06,184
DAVID J Malan: Say mill-ġdid?

1000
00:44:06,184 --> 00:44:07,100
UDJENZA: [inaudible].

1001
00:44:07,100 --> 00:44:07,962

1002
00:44:07,962 --> 00:44:08,920
DAVID J Malan: Perfect.

1003
00:44:08,920 --> 00:44:10,180
Hija jibdel din in binarja.

1004
00:44:10,180 --> 00:44:14,200
Hija jibdel din in zeroes u dawk
mill-kodiċi sors Ingliż simili attwali.

1005
00:44:14,200 --> 00:44:16,424
U allura nistgħu attwalment
run dawk zeroes u dawk

1006
00:44:16,424 --> 00:44:18,840
billi tgħaddi minnhom permezz tal-
CPU billi tikklikkja darbtejn l-ikona

1007
00:44:18,840 --> 00:44:19,980
jew running kmand.

1008
00:44:19,980 --> 00:44:23,770
>> PHP u Python u Ruby
u Perl u JavaScript

1009
00:44:23,770 --> 00:44:26,250
u għenieqed ta 'oħrajn
lingwi huma interpretati

1010
00:44:26,250 --> 00:44:29,290
lingwi, li huwa li jgħidu
inti ma jikkompilawha.

1011
00:44:29,290 --> 00:44:34,220
Pjuttost, inti għalf minnhom bħala input biex
programm imsejjaħ 'interpretu.

1012
00:44:34,220 --> 00:44:36,640
U li interpretu,
li xi ħadd ieħor kiteb,

1013
00:44:36,640 --> 00:44:40,930
jaqra sors tiegħek kodiċi fuq għal isfel,
xellug għal-lemin u biss tinterpreta

1014
00:44:40,930 --> 00:44:43,000
dawk il-linji u ma dak you say.

1015
00:44:43,000 --> 00:44:45,360
>> Mela jekk inti tiltaqa 'ma'
linja li tgħid istampar,

1016
00:44:45,360 --> 00:44:48,660
dan ma jfissirx neċessarjament jikkonvertu print
li l-żerijiet korrispondenti u dawk.

1017
00:44:48,660 --> 00:44:51,910
Hija biss għandha dan interpretu bħal
a jekk il-kundizzjoni kbir li jgħid,

1018
00:44:51,910 --> 00:44:56,110
jekk istruzzjoni programmer hija
istampar, allura jagħmel dan li ġej.

1019
00:44:56,110 --> 00:44:58,170
Għalhekk tinterpreta dan biss
billi tip ta 'raġunament

1020
00:44:58,170 --> 00:44:59,800
permezz ta 'dak int javżak li tagħmel.

1021
00:44:59,800 --> 00:45:01,320
>> U PHP hija waħda minn dawn il-lingwi.

1022
00:45:01,320 --> 00:45:05,310
U s-snin PHP ilu kienet imfassla
preċiżament għall-ipprogrammar tal-web.

1023
00:45:05,310 --> 00:45:08,160
U kien inizjalment
lingwa messy sloppy ħafna.

1024
00:45:08,160 --> 00:45:10,940
U fil-fatt, hemm enormi
ammont tal-kodiċi PHP ħażina hemmhekk.

1025
00:45:10,940 --> 00:45:13,520
Iżda l-lingwa nnifisha
kiber matul is-snin,

1026
00:45:13,520 --> 00:45:16,200
tant li issa huwa
attwalment pass mill-isbaħ li jmiss

1027
00:45:16,200 --> 00:45:19,970
pedagoġikament minn C għaliex dan huwa
hekk darned familjari kollox

1028
00:45:19,970 --> 00:45:22,380
inti stajt biss tidher fl-aħħar ftit ġimgħat.

1029
00:45:22,380 --> 00:45:25,724
>> Id-differenza waħda inizjali aħna ser tara
m'hemm l-ebda funzjoni prinċipali jibqgħalu.

1030
00:45:25,724 --> 00:45:28,890
Meta inti tibda bil-miktub kodiċi, huwa biss
se tikseb esegwita x'ikun,

1031
00:45:28,890 --> 00:45:30,220
kif aħna ser tara fil-mument.

1032
00:45:30,220 --> 00:45:33,320
Sadanittant, hawn hu dak ta '
varjabbli qisu fil-PHP.

1033
00:45:33,320 --> 00:45:35,840
Huwa ftit differenti,
iżda biss bilkemm.

1034
00:45:35,840 --> 00:45:39,380
>> Fil-PHP, hemm Ma ittajpjar qawwija.

1035
00:45:39,380 --> 00:45:41,430
Hemm ġimgħa ittajpjar,
li ifisser biss hemm

1036
00:45:41,430 --> 00:45:44,030
huma tipi ta 'data bħal kordi
u n-numri u affarijiet oħra.

1037
00:45:44,030 --> 00:45:47,030
Imma inti ma jolqot li tispeċifika
dak li huma aktar.

1038
00:45:47,030 --> 00:45:48,980
PHP figuri it out għalik.

1039
00:45:48,980 --> 00:45:52,030
Is-sinjal dollaru huwa biss deċiżjoni
li l-poplu PHP magħmula snin

1040
00:45:52,030 --> 00:45:54,890
ilu tali li kwalunkwe varjabbli fil-PHP
biss jibda b'sinjal dollaru.

1041
00:45:54,890 --> 00:45:58,130
Huwa fil-fatt tip ta 'utli f'dak
jumps fil inti ftit aktar.

1042
00:45:58,130 --> 00:46:01,315
>> Iżda wara li, dan
hija kundizzjoni fil-PHP.

1043
00:46:01,315 --> 00:46:03,140

1044
00:46:03,140 --> 00:46:04,730
X'hemm differenti versus C?

1045
00:46:04,730 --> 00:46:07,180

1046
00:46:07,180 --> 00:46:09,600
Trick question-- xejn,
li huwa attwalment tassew sbieħ.

1047
00:46:09,600 --> 00:46:12,140
Espressjonijiet Boolean fil PHP---istess.

1048
00:46:12,140 --> 00:46:19,354
Espressjonijiet Boolean ma 'u versus
jew, swiċċijiet, loops, loops, loops-- OK,

1049
00:46:19,354 --> 00:46:20,270
dan huwa wieħed differenti.

1050
00:46:20,270 --> 00:46:22,660
>> Għalhekk jirriżulta li hemm
Koppja ta 'fatturi oħra fil-PHP.

1051
00:46:22,660 --> 00:46:25,243
Waħda minnhom hija attwalment dan,
li huwa wonderfully konvenjenti.

1052
00:46:25,243 --> 00:46:29,250
Jekk $ numri huwa array li inti stajt
iddikjarata preċedentement fil-programm,

1053
00:46:29,250 --> 00:46:33,350
għandek dan fancy għal kull jinbena
li minflok tagħmel kollha ta 'dak

1054
00:46:33,350 --> 00:46:37,020
I annoying ikun egwali għal 0, I huwa
inqas minn dan, [? I ++?],

1055
00:46:37,020 --> 00:46:40,320
għal kull numri bħal numru, fejn kull
ta 'dawk il-valuri sinjal dollaru huwa biss

1056
00:46:40,320 --> 00:46:42,790
varjabbli, u l-aħħar
inti tista 'taħseb bħala I.

1057
00:46:42,790 --> 00:46:44,290
Inti tista 'sejħa hija xi ħaġa li trid.

1058
00:46:44,290 --> 00:46:45,770
I sejħitilha numru.

1059
00:46:45,770 --> 00:46:48,825
Dan se jtenni fuq
l-array imsejħa numri.

1060
00:46:48,825 --> 00:46:51,200
U fuq kull iterazzjoni, huwa
ser taġġorna awtomatikament

1061
00:46:51,200 --> 00:46:54,340
għalik l-għadd sinjal dollaru
varjabbli sabiex inti kontinwament

1062
00:46:54,340 --> 00:46:58,210
jkollhom aċċess għall-varjabbli trid
mingħajr ma jkollhom jagħmlu xi bracket kwadru

1063
00:46:58,210 --> 00:47:00,980
notazzjoni jew indiċjar fis firxa.

1064
00:47:00,980 --> 00:47:04,950
>> Lil hinn minn dan, aħna anke jkollhom affarijiet simili
arrays, li tfittex kważi l-istess,

1065
00:47:04,950 --> 00:47:08,210
ħlief huwa komuni ħafna, kif aħna ser
tara, kemm fil-PHP u JavaScript

1066
00:47:08,210 --> 00:47:10,750
pre initialize firxa
użu parentesi kwadri.

1067
00:47:10,750 --> 00:47:12,040
C użi braces kaboċċi.

1068
00:47:12,040 --> 00:47:15,330
Allura huwa kemmxejn differenti, anke jekk
aħna ma verament jużaw dik trick ħafna.

1069
00:47:15,330 --> 00:47:20,090
>> Iżda anke aktar qawwi,
PHP arrays assoċjattiva,

1070
00:47:20,090 --> 00:47:23,100
li huwa mod fancy
ta 'tgħid tabelli hash.

1071
00:47:23,100 --> 00:47:31,610
Fil-fatt, jekk inti tixtieq li tiddikjara hash
tabella fil-PHP, b'differenza C-- kemm

1072
00:47:31,610 --> 00:47:34,775
linji ta 'kodiċi ma jieħdu biex
fil-fatt jimplimentaw tabella hash fil C?

1073
00:47:34,775 --> 00:47:38,310
Jew kif ħafna linji tal-kodiċi huwa
jieħdu sabiex jimplementaw tabella hash fil C?

1074
00:47:38,310 --> 00:47:39,820
Allura huwa probabbilment ħafna, id-dritt?

1075
00:47:39,820 --> 00:47:41,680
Huwa ftit tużżana, forsi 100 jew 200.

1076
00:47:41,680 --> 00:47:42,980
Huwa nontrivial.

1077
00:47:42,980 --> 00:47:45,420
Jew huwa dwar li tkun, bħala
tkun taf dalwaqt tara, nontrivial

1078
00:47:45,420 --> 00:47:48,080
biex jimplimentaw tabella hash
[Inaudible] u wkoll jipprova.

1079
00:47:48,080 --> 00:47:50,580
Iżda fil PHP-- u franchement, I
probabbilment ma għandu jgħidlek dan

1080
00:47:50,580 --> 00:47:53,630
sakemm Monday-- fil-PHP, jekk
inti tixtieq tabella, isir.

1081
00:47:53,630 --> 00:47:56,431
Li l-hash table-- hekk
b'linja waħda tal-kodiċi.

1082
00:47:56,431 --> 00:47:56,930
U

1083
00:47:56,930 --> 00:47:58,810
>> A lott ta 'lingwi tagħmel dan.

1084
00:47:58,810 --> 00:48:00,190
Have fun ma pset ħamsa.

1085
00:48:00,190 --> 00:48:01,980
Allura ħafna ta 'lingwi tagħmel dan.

1086
00:48:01,980 --> 00:48:03,050

1087
00:48:03,050 --> 00:48:06,140
Huma jagħtuk dawn estrazzjonijiet
li nies oħra, programmaturi oħra,

1088
00:48:06,140 --> 00:48:09,870
ħolqu għalik sabiex
inti tista 'toqgħod fuq l-ispallejn

1089
00:48:09,870 --> 00:48:13,290
u tibda tuża l-ideat li huma super
konvinċenti, bħal tabelli hash u siġar

1090
00:48:13,290 --> 00:48:14,140
u tipprova.

1091
00:48:14,140 --> 00:48:17,790
Imma inti ma neċessarjament ikollhom
jimplimentaw dawk l-affarijiet yourself.

1092
00:48:17,790 --> 00:48:20,850
>> U għalhekk finalment, liema
aħna qed tmur għall-użu PHP għall

1093
00:48:20,850 --> 00:48:23,580
huwa potenzjalment miktub programmi
tal-hekk imsejħa linja tal-kmand.

1094
00:48:23,580 --> 00:48:26,600
Nistgħu jirrikreaw kull programm
konna bil-miktub dan is-semestru s'issa,

1095
00:48:26,600 --> 00:48:30,410
ħlief forsi tbegħid li juża SPL,
li hija speċifika għall C fil-mument.

1096
00:48:30,410 --> 00:48:33,100
Iżda kull problema oħra stabbilita,
ċertament Mario u Caesar

1097
00:48:33,100 --> 00:48:35,300
u Vigenere u
[? Xquq?] U onward, aħna

1098
00:48:35,300 --> 00:48:39,520
tista terġa 'timplimenta fil-PHP, u
probabbilment ftit aktar faċilment.

1099
00:48:39,520 --> 00:48:43,050
>> Imma dak li aħna qed finalment tmur
għall-użu PHP għall huwa l-ipprogrammar tal-web.

1100
00:48:43,050 --> 00:48:46,420
U aħna qed tmur biex jintroduċu jmiss
ġimgħa mudell mentali, mudell imsejjaħ

1101
00:48:46,420 --> 00:48:49,610
MVC, kontrollur fehma mudell,
li jekk inti ghamilt programmazzjoni

1102
00:48:49,610 --> 00:48:51,610
qabel fl-Python jew
Ruby jew x'imkien ieħor, inti

1103
00:48:51,610 --> 00:48:54,112
tista 'taf ta' dan it-tim ma
Binarji u Django u simili.

1104
00:48:54,112 --> 00:48:55,820
Imma jekk int ġodda għall-
dan ukoll, inti ser tara

1105
00:48:55,820 --> 00:48:59,652
li dan huwa attwalment naturali ħafna
estensjoni tal-factorization

1106
00:48:59,652 --> 00:49:01,360
u t-tip ta 'disinn
ta 'kodiċi li konna

1107
00:49:01,360 --> 00:49:04,670
qed tagħmel fil-C. Aħna qed tmur biex issa
japplikaw xi wħud minn dawk il-lezzjonijiet għall PHP

1108
00:49:04,670 --> 00:49:07,190
hekk li finalment, aħna
implimentazzjoni websajts tagħna stess.

1109
00:49:07,190 --> 00:49:09,080
U jekk int-tip ta '
mesmerized jew étonné

1110
00:49:09,080 --> 00:49:10,954
li aħna qed tmur biex tagħmel
kollha ta 'l-hekk malajr,

1111
00:49:10,954 --> 00:49:13,410
tirrealizza li kważi kull
semestru, kważi 90%

1112
00:49:13,410 --> 00:49:16,560
ta 'studenti CS50, inklużi dawk
li qatt programmati qabel,

1113
00:49:16,560 --> 00:49:20,329
jispiċċaw jagħmlu proġetti finali li
huma bbażati fuq programmazzjoni web.

1114
00:49:20,329 --> 00:49:23,120
U għalhekk inti se tara li l-prospetti
huma għolja fil-ġimgħat li ġejjin.

1115
00:49:23,120 --> 00:49:24,965
Allura aħna se tara inti mbagħad nhar it-Tnejn.

1116
00:49:24,965 --> 00:49:27,260

1117
00:49:27,260 --> 00:49:30,120
>> SPEAKER 1: U issa, Deep
Ħsibijiet mill Daven Farnham.

1118
00:49:30,120 --> 00:49:34,055

1119
00:49:34,055 --> 00:49:34,780
Tabelli hash.

1120
00:49:34,780 --> 00:49:37,180

1121
00:49:37,180 --> 00:49:38,402
>> [Rires]

1122
00:49:38,402 --> 00:49:38,902