1 00:00:00,000 --> 00:00:17,044 2 00:00:17,044 --> 00:00:18,210 DAVID J. Malan: Hello dinja. 3 00:00:18,210 --> 00:00:22,679 Dan huwa CS50 Live u dan huwa ta 'Marzu 14, li jfisser, kuntenti jum pi. 4 00:00:22,679 --> 00:00:24,470 Issa huwa kien filwaqt li peress li aħna stajt tidher int, 5 00:00:24,470 --> 00:00:26,682 għaliex Ġimgħa li għadda, Rob Bowden u I kienu fil-fatt 6 00:00:26,682 --> 00:00:28,390 bogħod waqt konferenza fil Atlanta, Georgia. 7 00:00:28,390 --> 00:00:30,525 A konferenza magħrufa bħala SIGCSE, l-Interessi Speċjali 8 00:00:30,525 --> 00:00:33,400 Grupp fuq Computer Science Edukazzjoni, li kull sena jġib flimkien 9 00:00:33,400 --> 00:00:35,900 xi 1,000 edukaturi sa jitkellmu dwar u biex jaħdmu 10 00:00:35,900 --> 00:00:38,692 fuq it-titjib fuq edukazzjoni tax-xjenza tal-kompjuter. 11 00:00:38,692 --> 00:00:40,650 Wieħed mill-kelliema ewlenin din is-sena, fil-fatt, 12 00:00:40,650 --> 00:00:42,800 kien il-fundatur ta ' code.org, li inti tista ' 13 00:00:42,800 --> 00:00:44,550 raw fl-istampa matul l-aħħar sena. 14 00:00:44,550 --> 00:00:47,050 Huma ghamilt straordinarja xogħol fl-aħħar sena jkollna 15 00:00:47,050 --> 00:00:50,310 nies eċċitati dwar ix-xjenza tal-kompjuter, u dwar l-ipprogrammar b'mod partikolari. 16 00:00:50,310 --> 00:00:52,351 Fil-fatt, wieħed mill-aktar tagħhom inizjattivi magħrufa sew 17 00:00:52,351 --> 00:00:56,560 huwa magħruf bħala Il Hour tal-Kodiċi li huwa opportunità u kurrikulu li permezz tagħhom 18 00:00:56,560 --> 00:00:58,769 int, jew xi ħabib, jew membru tal-familja, jew kollega, 19 00:00:58,769 --> 00:01:01,810 jistgħu jiksbu idejk maħmuġ ma 'ftit tax-xjenza tal-kompjuter u l-programmazzjoni 20 00:01:01,810 --> 00:01:04,610 għal ftit siegħa biex ara jekk inti tieħu lilu. 21 00:01:04,610 --> 00:01:06,964 >> Fil-fatt, jekk inti stess jkollhom xi ħabib, membru tal-familja, 22 00:01:06,964 --> 00:01:10,130 jew kollega li tixtieq tipprova tiegħu jew naħa tagħha f'xi xjenza tal-kompjuter, 23 00:01:10,130 --> 00:01:13,390 imma taħseb jitfg minnhom fis tal CS50 kurrikulu jista 'jkun daqsxejn wisq wisq 24 00:01:13,390 --> 00:01:17,910 Hekk, ukoll bil-mezzi kollha, jirreferihom biex code.org / jitgħallmu fejn jistgħu jippruvaw 25 00:01:17,910 --> 00:01:21,110 naħa tagħhom għal wieħed biss siegħa fuq daqsxejn ta 'xjenza tal-kompjuter. 26 00:01:21,110 --> 00:01:23,180 Jew aħjar għadhom, juru lilhom dan il-klipp. 27 00:01:23,180 --> 00:01:27,570 >> [VIDEO Daqq] 28 00:01:27,570 --> 00:01:28,570 >> Hi, jien Leah. 29 00:01:28,570 --> 00:01:29,320 >> -U jien Tonya. 30 00:01:29,320 --> 00:01:31,820 >> -U aħna qed xortik tajba biżżejjed li jistudjaw ix-xjenza tal-kompjuter. 31 00:01:31,820 --> 00:01:34,895 Aħna naħsbu li huwa terribbli li 90% ta 'l-iskola ma jgħallmu. 32 00:01:34,895 --> 00:01:37,020 'Huma definittivament ma offerta li fl-iskola għolja tiegħi. 33 00:01:37,020 --> 00:01:40,047 -Allura aħna qed tipprova tagħmel dan il-video biex juru li xi ħadd jistgħu jitgħallmu. 34 00:01:40,047 --> 00:01:42,463 Aħna rridu li tikseb 10 miljun istudenti biex jagħmlu l-Hour tal-Kodiċi. 35 00:01:42,463 --> 00:01:43,810 >> -Hour tal-Kodiċi. 36 00:01:43,810 --> 00:01:44,410 >> -Hour tal-Kodiċi. 37 00:01:44,410 --> 00:01:45,405 >> -Il Hour tal-Kodiċi. 38 00:01:45,405 --> 00:01:46,317 >> -Hour tal-Kodiċi. 39 00:01:46,317 --> 00:01:46,900 -Hour tal-Kodiċi. 40 00:01:46,900 --> 00:01:47,460 -Hour tal-Kodiċi. 41 00:01:47,460 --> 00:01:48,043 -Hour tal-Kodiċi. 42 00:01:48,043 --> 00:01:49,947 -Il Hour tal-Kodiċi. 43 00:01:49,947 --> 00:01:51,780 -Kif tista 'tikseb lilu li jiksbu l-ġirasol. 44 00:01:51,780 --> 00:01:53,920 Hu għandu bżonn biex jagħmlu xi azzjonijiet. 45 00:01:53,920 --> 00:01:54,560 >> -I ltqajna. 46 00:01:54,560 --> 00:01:56,440 Yay. 47 00:01:56,440 --> 00:01:59,610 >> -U allura aħna ser run u tara x'jiġri. 48 00:01:59,610 --> 00:02:00,415 >> -Amazing. 49 00:02:00,415 --> 00:02:02,598 >> -Hemm immorru. 50 00:02:02,598 --> 00:02:04,483 >> -Inti biss kiteb l-ewwel programm tiegħek. 51 00:02:04,483 --> 00:02:04,983 -I kiteb dan? 52 00:02:04,983 --> 00:02:05,937 -Yeah. 53 00:02:05,937 --> 00:02:07,368 -Dan huwa l-kodiċi inti biss kiteb. 54 00:02:07,368 --> 00:02:08,800 -Ħafna biża. 55 00:02:08,800 --> 00:02:12,317 -I ħsibt simili, kodiċi kien simili Hacker FBI, simboli u l-għalf. 56 00:02:12,317 --> 00:02:14,650 -A ftit ta 'problema problemi, xi ftit ta 'loġika. 57 00:02:14,650 --> 00:02:15,650 -Huwa simili istruzzjonijiet. 58 00:02:15,650 --> 00:02:18,040 -Ipprogrammar huwa ħafna aktar faċli llum. 59 00:02:18,040 --> 00:02:20,060 -Don 'biss play fuq il-mobile tiegħek. 60 00:02:20,060 --> 00:02:20,600 Program. 61 00:02:20,600 --> 00:02:21,099 >> -Id-dritt. 62 00:02:21,099 --> 00:02:21,926 -Biża. 63 00:02:21,926 --> 00:02:24,050 >> -Kif ma xi ħadd tmur dwar jkollna xogħol? 64 00:02:24,050 --> 00:02:26,960 >> -Forsi tieħu klassi online, issib klassi f'kulleġġ komunità. 65 00:02:26,960 --> 00:02:29,219 >> -Inti tista 'tieħu waħda mill-aħjar jħallsu l-impjiegi fid-dinja. 66 00:02:29,219 --> 00:02:31,510 -I think mediċina jiċċaqilqu fil-età tal-kompjuter kollu. 67 00:02:31,510 --> 00:02:33,450 Teknoloġija tmiss kull parti minn ħajjitna. 68 00:02:33,450 --> 00:02:36,340 Jekk inti tista 'toħloq teknoloġija, tista 'tbiddel id-dinja. 69 00:02:36,340 --> 00:02:39,539 >> -Allura aħna qed eċċitati li int jipparteċipaw fl Hour lum tal-Kodiċi. 70 00:02:39,539 --> 00:02:40,830 -Aħna biss għamlet żewġ linji ta 'kodiċi. 71 00:02:40,830 --> 00:02:42,471 -Tliet linji ta 'kodiċi. 72 00:02:42,471 --> 00:02:42,970 -Erba 'linji. 73 00:02:42,970 --> 00:02:43,760 sebgħa linji. 74 00:02:43,760 --> 00:02:44,585 -ħames linji. 75 00:02:44,585 --> 00:02:49,435 76 00:02:49,435 --> 00:02:50,971 -16 Linji ta 'kodiċi. 77 00:02:50,971 --> 00:02:51,720 -99 Linji ta 'kodiċi. 78 00:02:51,720 --> 00:02:52,670 -60 Linji. 79 00:02:52,670 --> 00:02:54,380 -18 Linji ta 'kodiċi. 80 00:02:54,380 --> 00:02:56,330 -75 Linji ta 'kodiċi. 81 00:02:56,330 --> 00:02:58,700 -Ma jimpurtax kemm qodma int. 82 00:02:58,700 --> 00:02:59,426 -Hour tal-Kodiċi. 83 00:02:59,426 --> 00:03:01,890 -Hour tal-Kodiċi. 84 00:03:01,890 --> 00:03:02,880 -Il Hour tal-Kodiċi. 85 00:03:02,880 --> 00:03:03,750 -Il Hour tal-Kodiċi. 86 00:03:03,750 --> 00:03:06,410 -Il Hour tal-Kodiċi. 87 00:03:06,410 --> 00:03:08,555 'Kemm jekk int żgħażagħ raġel jew mara żgħażagħ. 88 00:03:08,555 --> 00:03:11,127 Jekk inti tgħix fil- belt jew żona rurali. 89 00:03:11,127 --> 00:03:13,876 -Kulħadd f'dan il-pajjiż għandhom jitgħallmu kif program kompjuter. 90 00:03:13,876 --> 00:03:15,001 -U jien kemm lestew il - 91 00:03:15,001 --> 00:03:16,050 -Hour tal-Kodiċi. 92 00:03:16,050 --> 00:03:17,790 -Huwa fil-fatt verament faċli biex jitgħallmu. 93 00:03:17,790 --> 00:03:19,330 -Girls għandhom jitgħallmu dan, wisq. 94 00:03:19,330 --> 00:03:22,940 'Jifhmu li l-lingwa li għaddej biex tkun il-futur. 95 00:03:22,940 --> 00:03:24,420 -Kulħadd jistgħu jitgħallmu xjenza tal-kompjuter. 96 00:03:24,420 --> 00:03:25,378 -U inti tista 'titgħallem wisq. 97 00:03:25,378 --> 00:03:29,374 Jack Dorsey, Mark Zuckerberg, Bill Gates, li kollha y'all, jien tagħlim. 98 00:03:29,374 --> 00:03:30,040 Agħti xi sparatura. 99 00:03:30,040 --> 00:03:43,330 100 00:03:43,330 --> 00:03:44,300 >> [Video daqq END] 101 00:03:44,300 --> 00:03:47,610 >> Issa xi ħaġa jgħidlekx me li jekk int fil CS50 jew hija fil CS50x, 102 00:03:47,610 --> 00:03:50,850 inti ħadthom jintefqu sew aktar minn biss siegħa fuq kodifikazzjoni. 103 00:03:50,850 --> 00:03:53,080 Iżda għal xi membri tal-familja, ħbieb, jew kollegi 104 00:03:53,080 --> 00:03:56,450 li tixtieq tintroduċi din dinja, hawnhekk inċentiv ieħor. 105 00:03:56,450 --> 00:03:57,440 Ftakar dan Guy? 106 00:03:57,440 --> 00:03:59,860 Popolari ħafna ta tard, għandha kien hekk imsejħa Flappy 107 00:03:59,860 --> 00:04:01,540 għasafar fuq pjattaformi varji. 108 00:04:01,540 --> 00:04:05,310 U hawn aħna għandna URL, fil code.org / Flappy, 109 00:04:05,310 --> 00:04:08,400 fejn l-folks tip in code.org jistgħu jitqiegħdu flimkien għodda via li inti 110 00:04:08,400 --> 00:04:12,570 jew xi ħabib tista 'tagħmel tiegħek implimentazzjoni ta 'din il-logħba popolari. 111 00:04:12,570 --> 00:04:13,910 Allura check out. 112 00:04:13,910 --> 00:04:15,811 >> Issa li konferenza, u nhar il-Ġimgħa. 113 00:04:15,811 --> 00:04:18,060 Rob Bowden u I fejn għal darb'oħra, bogħod f'din il-konferenza, 114 00:04:18,060 --> 00:04:19,768 u aħna ħsibt dwar jkollhom ospitanti mistieden. 115 00:04:19,768 --> 00:04:22,174 U aħna ppruvaw out pjuttost ftit folks għall-provi. 116 00:04:22,174 --> 00:04:24,090 Ħadd minnhom deher li taħdem, hekk ħsibna 117 00:04:24,090 --> 00:04:27,110 aħna'd nuruk ftit clips ta 'dak li għamlet transpire. 118 00:04:27,110 --> 00:04:27,810 >> [VIDEO Daqq] 119 00:04:27,810 --> 00:04:31,670 >> RAMON GALVAN: Ninsab mili Ramon Galvan fl għal ospitanti normali tiegħek, David Malan. 120 00:04:31,670 --> 00:04:40,340 Passcode-militar Amerikan kien 000000, mhux verament sikur jekk inti ssaqsi jekk me. 121 00:04:40,340 --> 00:04:43,430 Madankollu, I love you. 122 00:04:43,430 --> 00:04:45,650 B'differenza David, li ċrieki inti. 123 00:04:45,650 --> 00:04:48,880 124 00:04:48,880 --> 00:04:51,040 Ejja ma jmorru fuq dan l-iżball. 125 00:04:51,040 --> 00:04:53,067 X'inhu dan dwar? 126 00:04:53,067 --> 00:04:54,733 Ejja biss tara video ma 'Harry Lewis. 127 00:04:54,733 --> 00:04:55,116 >> [Video daqq END] 128 00:04:55,116 --> 00:04:57,721 >> DAVID J. Malan: Issa, dak l-aktar umoristiċi dwar dan clip mhix 129 00:04:57,721 --> 00:05:00,720 kif Ramon mwettqa quddiem il- camera, imma kif Ramon ma jafx, 130 00:05:00,720 --> 00:05:02,870 sakemm bħala ta 'ftit mumenti ilu, li konna 131 00:05:02,870 --> 00:05:05,860 se jkollu dawk clips lura hawn għalik fuq l-internet. 132 00:05:05,860 --> 00:05:07,680 Allura CS50 stess, Ramon Galvan. 133 00:05:07,680 --> 00:05:10,070 Niġu lura forsi xi episodju futur. 134 00:05:10,070 --> 00:05:12,460 >> Issa sadanittant, inti tista 'recall aħna xellug ħinijiet aħħar episodju 135 00:05:12,460 --> 00:05:14,670 fuq daqsxejn ta 'cliffhanger, fejn aħna imsemmi 136 00:05:14,670 --> 00:05:17,250 li Rob Bowden għandha a twin brother, Paul. 137 00:05:17,250 --> 00:05:19,450 Min, għal darb'oħra, fancies ruħu daqsxejn ta 'kummidjant. 138 00:05:19,450 --> 00:05:22,200 Iżda huwa wkoll ġara li jidhru fi popolari juru american logħba, 139 00:05:22,200 --> 00:05:23,696 u staqsejna inti liema waħda. 140 00:05:23,696 --> 00:05:25,570 Well bosta minnkom kiteb fl mar-risposta. 141 00:05:25,570 --> 00:05:27,580 U hawnhekk eżempju ta 'dan. 142 00:05:27,580 --> 00:05:31,140 >> Fil CS50 ħajjin, David imsemmija dwar Robert twin brother, Paul Bowden, 143 00:05:31,140 --> 00:05:32,590 u staqsa dwar Google dan. 144 00:05:32,590 --> 00:05:34,420 Ukoll qisu hu fl Harvard, wisq. 145 00:05:34,420 --> 00:05:37,990 U, Min Irid To Be A Millionaire, u iva, jekk jien l-ewwel wieħed 146 00:05:37,990 --> 00:05:41,810 biex tirrapporta dan, David, sir, I kieku jkun ferħan li tkun famuż fuq il-CS50 jmiss 147 00:05:41,810 --> 00:05:42,310 ħajjin. 148 00:05:42,310 --> 00:05:45,400 Allura innifisek famuż għaliex ir-risposta kienet tabilħaqq, 149 00:05:45,400 --> 00:05:46,650 Min Irid To Be A Millionaire. 150 00:05:46,650 --> 00:05:50,390 U fil-fatt, isaffru hawn qed Paul Bowden flimkien ospitanti li TV ispettaklu. 151 00:05:50,390 --> 00:05:53,344 U aħna wkoll għamilt daqsxejn ta 'tħaffir, u sabet dan il-klipp għalik. 152 00:05:53,344 --> 00:05:54,010 [VIDEO Daqq] 153 00:05:54,010 --> 00:05:56,410 -Paul Bowden minn Franklin, New Jersey. 154 00:05:56,410 --> 00:05:59,290 155 00:05:59,290 --> 00:05:59,897 Hey Paul. 156 00:05:59,897 --> 00:06:00,730 Merħba għall-ispettaklu. 157 00:06:00,730 --> 00:06:02,650 >> -Grazzi. 158 00:06:02,650 --> 00:06:06,140 >> -Paul jgħid hawnhekk inti Sophomore fil-Harvard University, ovvjament 159 00:06:06,140 --> 00:06:07,840 Guy intelliġenti. 160 00:06:07,840 --> 00:06:09,400 >> -I raden. 161 00:06:09,400 --> 00:06:11,384 >> -Well fil-ktieb tiegħi li ċertament jissuġġerixxi hekk. 162 00:06:11,384 --> 00:06:13,800 U naf meta inti kienu wieqfa fil-linja għal Millionaire, 163 00:06:13,800 --> 00:06:17,420 sinjal mis-sema qal int probabbilment se jagħmlu tajjeb, id-dritt? 164 00:06:17,420 --> 00:06:19,260 >> 'Tista' tgħid li. 165 00:06:19,260 --> 00:06:22,920 Meta I kien bil-wieqfa fil-linja kelli qmis Polo li kien tucked fi 166 00:06:22,920 --> 00:06:26,300 u għasfur ġara lill ħmieġ dritt l-dahar tal shirt tiegħi. 167 00:06:26,300 --> 00:06:28,510 U kien għadu tucked pulzieri 168 00:06:28,510 --> 00:06:30,390 Iżda huwa spiċċa biex tkun Xorti tajba. 169 00:06:30,390 --> 00:06:32,070 >> -Hija Xorti tajba, ara? 170 00:06:32,070 --> 00:06:33,440 Hemm inti tmur, int hawn. 171 00:06:33,440 --> 00:06:35,086 Kull dritt, Paul. 172 00:06:35,086 --> 00:06:36,440 Inti lest? 173 00:06:36,440 --> 00:06:36,941 >> -I am lest. 174 00:06:36,941 --> 00:06:37,440 -Id-dritt. 175 00:06:37,440 --> 00:06:38,685 Imbagħad ejja jilagħbu Millionaire. 176 00:06:38,685 --> 00:06:41,360 177 00:06:41,360 --> 00:06:44,120 U ħuh tiegħek kien seduta lura int, brother Rob tiegħek. 178 00:06:44,120 --> 00:06:45,220 Kif inti, Rob? 179 00:06:45,220 --> 00:06:46,150 >> 'I'm tajba kif int? 180 00:06:46,150 --> 00:06:47,421 >> Brother-Twin. 181 00:06:47,421 --> 00:06:47,920 -Iva. 182 00:06:47,920 --> 00:06:50,290 -Issa int, l-iżgħar għalkemm, inti ħareġ sitt minuti wara, id-dritt? 183 00:06:50,290 --> 00:06:51,130 Huwa li korretta? 184 00:06:51,130 --> 00:06:51,650 >> -I am, iva. 185 00:06:51,650 --> 00:06:53,970 >> 'Imma int l-brother aktar intelliġenti? 186 00:06:53,970 --> 00:06:55,480 >> Well, I ma jridux li brag. 187 00:06:55,480 --> 00:06:56,765 So I ma tistax tirrispondi għal din. 188 00:06:56,765 --> 00:06:58,600 >> [Video daqq END] 189 00:06:58,600 --> 00:07:02,610 >> -Allura Rob għandu twin, jikteb ieħor ta 'klassi tiegħek, hmm interessanti. 190 00:07:02,610 --> 00:07:04,410 Kif fil-fond ma 'l-toqba fenek tmur? 191 00:07:04,410 --> 00:07:08,290 Għandi mistoqsija, għaliex problema settijiet jieħu daqshekk żmien biex jiġu autograded? 192 00:07:08,290 --> 00:07:09,860 X'inhu jiġri wara l-kwinti? 193 00:07:09,860 --> 00:07:11,590 Allura aħna ħasbu li dan kieku fil-fatt tkun mistoqsija tajba 194 00:07:11,590 --> 00:07:14,930 li twieġeb għaliex ma jissuġġerixxu daqsxejn ta 'teknika interessanti sottostanti 195 00:07:14,930 --> 00:07:15,620 dettalji. 196 00:07:15,620 --> 00:07:18,880 Kuntrarju għat-twemmin popolari, dawn mhumiex fil-fatt gradati mill Muppets, iżda pjuttost 197 00:07:18,880 --> 00:07:21,950 minn infrastruttura li aħna magħrufa bħala Iċċekkja 50 fuq il-klijent. 198 00:07:21,950 --> 00:07:25,350 U infrastruttura nafu tagħha sandbox 50 fuq in-naħa server. 199 00:07:25,350 --> 00:07:27,250 >> Issa għal dawk familjari, sabiex jiġu ttestjati 200 00:07:27,250 --> 00:07:30,009 il-korrettezza ta 'xi wħud Problema CS50 tal-problemi stabbiliti, 201 00:07:30,009 --> 00:07:32,050 inti tista 'tmexxi kmand l-appliance CS50 magħrufa 202 00:07:32,050 --> 00:07:35,355 bħala check 50, fejn inti tispeċifika identifikatur uniku għat-test 203 00:07:35,355 --> 00:07:36,230 li inti tixtieq li tmexxi. 204 00:07:36,230 --> 00:07:38,050 U allura inti tispeċifika il-mogħdijiet għall-fajl 205 00:07:38,050 --> 00:07:40,697 jew fajls li inti tixtieq li upload lill-servers għall-ittestjar. 206 00:07:40,697 --> 00:07:42,780 Issa, meta r-rispons taqa 'lura mill-server, 207 00:07:42,780 --> 00:07:45,820 nisperaw li inti tara kollha aħdar smiley tiffaċċja, bħal dawk hawn, 208 00:07:45,820 --> 00:07:49,000 jindika li I kiteb "Hello, dinja" korrett ħafna. 209 00:07:49,000 --> 00:07:51,630 B'kuntrast, jekk għamilt xi ħaġa ħażin, bħal ma fil-fatt 210 00:07:51,630 --> 00:07:55,045 jissemmew il-fajl korrett, I jista ' nikseb dan wiċċ unhappy scary aħmar 211 00:07:55,045 --> 00:07:58,230 qal hello.c teżisti, li jfisser li ma 212 00:07:58,230 --> 00:07:59,669 fil-fatt, kif indikat mill-aħmar. 213 00:07:59,669 --> 00:08:01,460 U jekk xi ħaġa huwa fil isfar, sadanittant, hija 214 00:08:01,460 --> 00:08:04,400 ifisser dawk il-verifiki lanqas biss run minħabba xi dipendenza, 215 00:08:04,400 --> 00:08:07,030 xi test preċedenti ma mhux fil-fatt tirnexxi. 216 00:08:07,030 --> 00:08:09,164 >> Allura dak li verament jiġri taħt il-barnuża? 217 00:08:09,164 --> 00:08:11,080 Ukoll meta inti tmexxi dan check 50 kmand, aħna qed 218 00:08:11,080 --> 00:08:12,830 essenzjalment iżżippjar up kollha tal-fajls tiegħek, 219 00:08:12,830 --> 00:08:16,510 ikkumpresshom, filwaqt li tibgħatilhom sa tara cluster CS50 ta 'servers, fejn 220 00:08:16,510 --> 00:08:19,090 aħna mbagħad toħloq dak li sejjaħ sandbox madwarhom. 221 00:08:19,090 --> 00:08:21,100 Essenzjalment inti tista 'taħseb ta 'dan bħala folder, 222 00:08:21,100 --> 00:08:25,250 u bħala utent speċjali li teżisti biss għall-finijiet tal-kumpilazzjoni 223 00:08:25,250 --> 00:08:28,790 u tmexxija li kodiċi speċifiku b'mod iżolat minn ħaddieħor, 224 00:08:28,790 --> 00:08:32,480 hekk li biss fil-każ li student ikollu loop infinita aċċidentali jew agħar, 225 00:08:32,480 --> 00:08:35,200 huwa mhux ser neċessarjament jaffettwaw ħaddieħor fuq is-sistema. 226 00:08:35,200 --> 00:08:39,200 Xi fajls u lanqas ma jistgħu jiġu mmanipulati jew imħassra li m'għandux ikun permess. 227 00:08:39,200 --> 00:08:41,159 >> Issa, kif ma l-kodiċi tikseb ttestjati? 228 00:08:41,159 --> 00:08:45,950 Well, aħna kiteb infrastruttura kollha imsejħa mill-ġdid, sandbox - CS 50 sandbox. 229 00:08:45,950 --> 00:08:48,470 U din l-infrastruttura huwa miktub, sorpriża, 230 00:08:48,470 --> 00:08:49,980 f'lingwa imsejħa JavaScript. 231 00:08:49,980 --> 00:08:53,000 Fejn inti tista 'taf, minn Clientside esperjenzi, iżda jirriżulta 232 00:08:53,000 --> 00:08:55,490 tista 'wkoll tuża JavaScript fuq in-naħa server. 233 00:08:55,490 --> 00:08:57,450 What do xi wħud mill- Testijiet attwalment look like? 234 00:08:57,450 --> 00:09:01,260 Well here xi wħud server sekondarji JavaScript kodiċi, u huwa biss silta minnu. 235 00:09:01,260 --> 00:09:04,710 Intant dan jirrapreżenta żewġ verifiki li nistgħu jimxu fuq kodiċi tiegħek. 236 00:09:04,710 --> 00:09:08,360 >> L-ewwel waħda minnhom top up hemm, kontrolli jekk jeżisti r-hello.c fajl, 237 00:09:08,360 --> 00:09:11,880 u t-tieni wieħed fil-fatt kontrolli jekk fajl tiegħek jikkompila OK. 238 00:09:11,880 --> 00:09:15,080 U dan huwa dak li finalment jiġġenera dawk uċuħ kuntenti 239 00:09:15,080 --> 00:09:18,479 jew dawk uċuħ kuntenti li tara fil-forma ta 'kontroll 50 riżultati. 240 00:09:18,479 --> 00:09:20,270 Issa, għal ħafna aktar dettall tekniku, int 241 00:09:20,270 --> 00:09:23,436 merħba lill tagħti ħarsa lejn dan id-dokument hawn, li inzerta kien attwalment 242 00:09:23,436 --> 00:09:25,680 ppreżentati fil-sena li għaddiet Konferenza SIGCSE, 243 00:09:25,680 --> 00:09:28,660 u ads fis ħafna aktar dettall dwar kif dik taħdem is-sistema 244 00:09:28,660 --> 00:09:31,010 u għaliex aħna mibnija din l-aħħar sena. 245 00:09:31,010 --> 00:09:33,180 >> Issa, fil-midja ta 'tard, kienet din l-espressjoni 246 00:09:33,180 --> 00:09:35,640 hawn - goto jonqsu, il- hekk imsejħa goto jonqsu 247 00:09:35,640 --> 00:09:38,410 bug li plagued Apple Computer reċentement. 248 00:09:38,410 --> 00:09:42,021 Issa, aħna ma jintroduċux din fl CS 50, minħabba li l-istqarrija goto fil-C 249 00:09:42,021 --> 00:09:44,770 hija ġeneralment frowned fuq, anki għalkemm definittivament għandha l-użi tagħha. 250 00:09:44,770 --> 00:09:47,490 U dak li dan ifisser hawn, goto jonqsu, huwa li tkun xi tkun 251 00:09:47,490 --> 00:09:50,550 programm għandu din il-linja ta ' kodiċi, għandhom imorru, jiġifieri 252 00:09:50,550 --> 00:09:54,290 jaqbżu, linja oħra tal-kodiċi irrispettivament minn kwalunkwe linji 253 00:09:54,290 --> 00:09:58,300 fl bejn, u dik il-linja tal-kodiċi għandha tkun immarkata bil-keyword jonqsu. 254 00:09:58,300 --> 00:10:01,005 >> U jonqsu jista 'jvarja, a FUBAR [? BES?] Iżda f'dan il-każ, 255 00:10:01,005 --> 00:10:03,630 Apple għażlet li hija sejħa jonqsu għaliex dan huwa l-blokki tal-kodiċi li 256 00:10:03,630 --> 00:10:06,850 għandhom jesegwixxu jekk u meta xi ħaġa tkun falliet. 257 00:10:06,850 --> 00:10:10,717 Issa, sfortunatament, Apple għamlet żball ma 'din id-dikjarazzjoni, kif aħna ser malajr tara. 258 00:10:10,717 --> 00:10:12,550 U huma reċentement rilaxxata din it-tħabbira 259 00:10:12,550 --> 00:10:14,710 f'wieħed mir-rapporti jiffissaw bug tagħhom. 260 00:10:14,710 --> 00:10:16,950 Attakkant ma ' pożizzjoni network privileġġata 261 00:10:16,950 --> 00:10:21,880 jista 'jaqbad jew jimmodifika data sessjonijiet protetti mill SSL / TLS. 262 00:10:21,880 --> 00:10:24,250 SSL, recall, kien sigur saff sokits, u huwa 263 00:10:24,250 --> 00:10:28,070 it-teknoloġija użata biex tipikament kriptaġġ traffiku bejn web browser, 264 00:10:28,070 --> 00:10:31,730 jgħidu fuq Mac jew iPhone, jew kwalunkwe apparat ieħor, u web server. 265 00:10:31,730 --> 00:10:33,400 U TLS huwa relatat ma 'dak. 266 00:10:33,400 --> 00:10:36,670 >> Din il-kwistjoni ġiet indirizzata mill- restawr nieqsa passi validazzjoni. 267 00:10:36,670 --> 00:10:40,350 Allura dan kien id-deskrizzjoni Apple ta ' il-problema u s-soluzzjoni għaliha. 268 00:10:40,350 --> 00:10:41,630 Imma dak ma dan verament tfisser? 269 00:10:41,630 --> 00:10:44,171 Allura għamilna xi tħaffir, u aħna attwalment jinstabu l-kodiċi sors 270 00:10:44,171 --> 00:10:49,170 għall-Apple implimentazzjoni stess tal SSL, li għal darb'oħra taffettwa MACs jew iPhone, 271 00:10:49,170 --> 00:10:51,970 partikolarment jekk inti qed tuża Safari fuq dawn il-kompjuters. 272 00:10:51,970 --> 00:10:53,890 Hawn silta minn dan il-kodiċi. 273 00:10:53,890 --> 00:10:56,140 >> Issa, inti tista 'ma jirrikonoxxu xi wħud mill-funzjonijiet. 274 00:10:56,140 --> 00:10:59,560 U inti tista 'ma jirrikonoxxu l-użu ta 'mur dikjarazzjoni sa issa. 275 00:10:59,560 --> 00:11:01,480 Iżda din hija sintassi kemmxejn familjari. 276 00:11:01,480 --> 00:11:04,900 Għandna xi jekk il-kundizzjonijiet, xi indentazzjoni, funzjoni, ċineg kaboċċi. 277 00:11:04,900 --> 00:11:06,340 Allura mhux kollha li barrani. 278 00:11:06,340 --> 00:11:07,780 Imma ejja zoom ftit. 279 00:11:07,780 --> 00:11:11,590 Hawnhekk, aġġusta għal dawk il-kondizzjonijiet, u hawnhekk jissemma goto jonqsu. 280 00:11:11,590 --> 00:11:12,579 Issa, dak li huwa jonqsu? 281 00:11:12,579 --> 00:11:14,870 Well ejja attwalment iscroll tinżel aktar fil-programm. 282 00:11:14,870 --> 00:11:17,360 Dawn huma l-linji ta ' kodiċi, dawk it-tliet linji li 283 00:11:17,360 --> 00:11:20,970 huma esegwiti jekk inti tabilħaqq mur jonqsu. 284 00:11:20,970 --> 00:11:22,430 >> Issa, x'inhu l-kwistjoni allura? 285 00:11:22,430 --> 00:11:24,430 Well, ejja mmorru lura up għal dawk il-kondizzjonijiet fejn 286 00:11:24,430 --> 00:11:28,630 Stajt enfasizzat bl-isfar isemmi kollha goto jonqsu. 287 00:11:28,630 --> 00:11:30,860 Tara xejn kurjuż? 288 00:11:30,860 --> 00:11:32,210 Iffoka fuq il-qiegħ hemmhekk. 289 00:11:32,210 --> 00:11:32,710 Dritt? 290 00:11:32,710 --> 00:11:34,830 Il-kodiċi jista 'jkun ġdid, iżda l-ideat mhumiex. 291 00:11:34,830 --> 00:11:37,130 Jekk aħna zoom fil hawn, inti ser avviż li l-programmer 292 00:11:37,130 --> 00:11:40,200 tkun goto miktub jonqsu darbtejn, iżda inċiża tnejn minnhom. 293 00:11:40,200 --> 00:11:44,445 Iżda int tista għamlu l-istess żball ruħek f'xi problemi għal CS 50. 294 00:11:44,445 --> 00:11:47,070 Sempliċiment għax inti-inċiż żewġ linji tal-kodiċi ġewwa ta 'kundizzjoni 295 00:11:47,070 --> 00:11:49,111 ma jfissirx li dawn qed kemm ser tesegwixxi. 296 00:11:49,111 --> 00:11:52,240 Huma qed biss kemm ser tesegwixxi jekk int attwalment jdawru tnejn minnhom 297 00:11:52,240 --> 00:11:53,100 ma 'dak? 298 00:11:53,100 --> 00:11:54,320 Braces kaboċċi. 299 00:11:54,320 --> 00:11:57,130 >> Allura dak li verament jiġri jekk I tip ta 'tiffissa l-indentazzjoni 300 00:11:57,130 --> 00:12:01,330 u ma jżidu ebda ċingi kaboċċi, x'hemm verament jiġri taħt il-barnuża, 301 00:12:01,330 --> 00:12:03,920 huwa li goto jonqsu għandha essenzjalment xellug alleanza hawn, 302 00:12:03,920 --> 00:12:07,100 li jfisser li għaddej biex tesegwixxi x'ikun. 303 00:12:07,100 --> 00:12:09,640 U int ser tmur, jew jaqbżu, dawk it-tliet 304 00:12:09,640 --> 00:12:12,500 linji ta 'kodiċi ħarisna f'mument ilu. 305 00:12:12,500 --> 00:12:14,330 Allura x'inhu l-implikazzjoni? 306 00:12:14,330 --> 00:12:17,760 Well, tagħti ħarsa lejn dawk qiegħ l-aktar żewġ linji dritt hawn. 307 00:12:17,760 --> 00:12:20,450 Dawk il-linji se qatt, qatt nikseb milħuqa. 308 00:12:20,450 --> 00:12:22,780 Minħabba x'ikun, li t-tieni goto jonqsu 309 00:12:22,780 --> 00:12:25,790 se ġġiegħel lill-programm jaqbżu dritt fuq dawk il-linji. 310 00:12:25,790 --> 00:12:28,030 U storja twila fil-qosor, dawk aħħar żewġ linji 311 00:12:28,030 --> 00:12:31,100 huma attwalment importanti għall- il-korrettezza ta 'SSL. 312 00:12:31,100 --> 00:12:35,610 >> Tabilħaqq, jekk ma tesegwixxi, huwa possibbli jew avversarju, Guy ħażina, 313 00:12:35,610 --> 00:12:38,210 pagi dak li huwa ġeneralment magħruf bħala bniedem fl-attakk tan-nofs, 314 00:12:38,210 --> 00:12:41,860 feint tkun websajt sigura simili Facebook, jew Amazon, jew Google. 315 00:12:41,860 --> 00:12:45,680 Imma verament biss tara - wara konnessjoni kriptat lilek, 316 00:12:45,680 --> 00:12:48,792 u mbagħad jgħaddi traffiku tiegħek tul, għall-aħjar jew għall-agħar. 317 00:12:48,792 --> 00:12:50,750 Possibilment username tiegħek, possibilment password tiegħek, 318 00:12:50,750 --> 00:12:54,080 possibilment informazzjoni tiegħek karta ta 'kreditu, li s-sit attwali in kwistjoni. 319 00:12:54,080 --> 00:12:55,410 Jew lanqas fil-livelli kollha. 320 00:12:55,410 --> 00:12:57,656 Fi kliem ieħor, dan pawżi SSL. 321 00:12:57,656 --> 00:12:59,280 Issa Thankfully, Apple għamlet jindirizzaw dan. 322 00:12:59,280 --> 00:13:01,930 Kemm għall Mac OS u IOS reċentement. 323 00:13:01,930 --> 00:13:04,790 Imma jekk inti tixtieq li doppju jiċċekkja kompjuter tiegħek issa tkun aġġornata, 324 00:13:04,790 --> 00:13:08,630 jekk wieħed jassumi għandek aġġornamenti auto fuq, ras għal gotofail.com 325 00:13:08,630 --> 00:13:11,440 u tkun taf tara ftit sbieħ test li se jgħidlek kemm. 326 00:13:11,440 --> 00:13:14,190 Sadanittant, jekk inti tixtieq li tieħu ħarsa lejn il-kodiċi sors attwali, 327 00:13:14,190 --> 00:13:16,990 dan huwa URL twil, iżda hawn l- kodiċi sors sħiħa għall-fajl 328 00:13:16,990 --> 00:13:19,740 jekk inti tixtieq li jiksbu sens ta ' dak l-ipprogrammar dinja reali huwa 329 00:13:19,740 --> 00:13:22,310 simili, u franchement bugs dinja reali. 330 00:13:22,310 --> 00:13:25,390 >> Taħdit ta 'bugs, dan même kien ċċirkolat pjuttost ftit tard. 331 00:13:25,390 --> 00:13:28,670 99 bugs ftit fil-kodiċi, 99 bugs ftit fil-kodiċi, 332 00:13:28,670 --> 00:13:32,650 tieħu waħda isfel, garża madwar, 127 bugs ftit fil-kodiċi. 333 00:13:32,650 --> 00:13:34,010 Allura dak li huwa dan li jirreferu għall? 334 00:13:34,010 --> 00:13:36,410 Possibilment, din hija esperjenza inti stess kellhom, 335 00:13:36,410 --> 00:13:39,400 fejn inti tipprova chase isfel xi bug, u mbagħad ieħor, jew forsi 336 00:13:39,400 --> 00:13:42,290 saħansitra aktar bugs rebbiegħa up bħala riżultat ta 'tiegħek li ppruvaw 337 00:13:42,290 --> 00:13:43,829 biex jindirizzaw problema waħda. 338 00:13:43,829 --> 00:13:45,620 Fil-fatt, biex dan hit dar anke aktar, 339 00:13:45,620 --> 00:13:48,080 ejja pull up wiċċ li huwa forsi familjari. 340 00:13:48,080 --> 00:13:49,730 Hal, minn Malcolm fil-Lvant. 341 00:13:49,730 --> 00:13:50,850 >> [VIDEO Daqq] 342 00:13:50,850 --> 00:13:52,818 >> [Daqq tal-mużika] 343 00:13:52,818 --> 00:14:17,587 344 00:14:17,587 --> 00:14:18,420 [Video daqq END] 345 00:14:18,420 --> 00:14:21,128 DAVID J. Malan: U issa xi hellos minn uħud mill-klassi tiegħek. 346 00:14:21,128 --> 00:14:24,405 Up ewwel hija Khalid, u ħabib tiegħu li silġ minn Virginia tramuntana 347 00:14:24,405 --> 00:14:26,030 fl-Istati Uniti. 348 00:14:26,030 --> 00:14:30,590 >> KHALID: mates Ahoy CS50, my isem huwa Khalid [inaudible]. 349 00:14:30,590 --> 00:14:35,580 Iltaqa Pappagall tiegħi, [inaudible] I jgħixu fil Virginia tramuntana. 350 00:14:35,580 --> 00:14:41,070 Jien tmien grader u jien eċċitati li jkun parti mill-klassi CS50. 351 00:14:41,070 --> 00:14:46,340 Dan huwa kbir li l-esperjenza kulleġġ imma jibqgħu d-dar. 352 00:14:46,340 --> 00:14:49,980 Kif tistgħu raden, I am rreġistrati fil-programm ta 'tagħlim online. 353 00:14:49,980 --> 00:14:54,380 Ħossok liberu li jesperjenzaw ewwel proġett tiegħi hawnhekk. 354 00:14:54,380 --> 00:14:56,579 Ara inti madwar. 355 00:14:56,579 --> 00:14:58,620 DAVID J. Malan: U issa ejja ras għal Kansas City, 356 00:14:58,620 --> 00:15:00,464 Missouri fejn Derek jistenna. 357 00:15:00,464 --> 00:15:03,380 Derek kien fuq ix-xogħol meta iffilmjati dan sabiex inti tista 'tisma daqsxejn ta' ħoss 358 00:15:03,380 --> 00:15:07,170 fl-isfond minħabba li jaħdem fil-ċentru tad-data. 359 00:15:07,170 --> 00:15:10,520 >> Derek MITCHELL: Hello dinja, jisimni Derek Mitchell. 360 00:15:10,520 --> 00:15:12,930 I am fil Kansas City, Missouri. 361 00:15:12,930 --> 00:15:16,790 U jien tieħu l-CS50 klassi minħabba I really 362 00:15:16,790 --> 00:15:19,830 bżonn jitgħallmu xi programmazzjoni għall-impjieg tiegħi. 363 00:15:19,830 --> 00:15:20,770 Dan huwa fejn naħdem. 364 00:15:20,770 --> 00:15:27,030 I am a technician appoġġ reġjonali għall- Cabela, outfitter qabel kollox fid-dinja. 365 00:15:27,030 --> 00:15:31,160 U jien biss tipprova li jitgħallmu ftit aktar programmazzjoni so I jistgħu jisbqu fuq karriera tiegħi 366 00:15:31,160 --> 00:15:33,690 u jkun biss tekniku aħjar. 367 00:15:33,690 --> 00:15:40,600 Għalhekk għal darb'oħra, jien jisimni Derek Mitchell u dan huwa CS50. 368 00:15:40,600 --> 00:15:45,950 >> [TALJANA TITKELLEM] 369 00:15:45,950 --> 00:15:47,110 >> FEDERICO: Hello dinja. 370 00:15:47,110 --> 00:15:48,318 Jisimni Federico Grivelli. 371 00:15:48,318 --> 00:15:49,210 I am mill-Italja. 372 00:15:49,210 --> 00:15:52,670 I twieled fil waħda mill-akbar bliet fil-pajjiż, Milan. 373 00:15:52,670 --> 00:15:56,720 U I kien attwalment tqajmet fil belt iżgħar li jmiss Milan. 374 00:15:56,720 --> 00:16:00,740 So here jibda x-xewqa tiegħi fuq jespandu l-orizzonti tiegħi. 375 00:16:00,740 --> 00:16:04,910 U dan għaliex illum I am a barrani skambju ta 'studenti fl-istat Washington. 376 00:16:04,910 --> 00:16:07,260 Of course, l-Istati Uniti tal-Amerika. 377 00:16:07,260 --> 00:16:10,545 Edukazzjoni sabiex Amerikan huwa verament differenti mit-Taljan. 378 00:16:10,545 --> 00:16:14,150 Hawnhekk I jiksbu ħafna aktar idejn fuq l-esperjenza, 379 00:16:14,150 --> 00:16:17,870 minflok studji u memorization. 380 00:16:17,870 --> 00:16:24,430 Allura dan kien me, jien jisimni darb'oħra huwa Federico Grivelli, u dan huwa CS50. 381 00:16:24,430 --> 00:16:27,240 >> DAVID J. Malan: U issa bonjour minn xi ħadd aħna ma kinux jistennew. 382 00:16:27,240 --> 00:16:28,380 >> SARAH COFFEY: Hello dinja. 383 00:16:28,380 --> 00:16:32,030 Jisimni Sarah Coffey, jien minn Maltham, Massachusetts, 384 00:16:32,030 --> 00:16:35,810 u jien miżżewġa li Stess Dan Coffey CS50 tal. 385 00:16:35,810 --> 00:16:39,592 Dan, I biss riedu li jixtiequ inti birthday kuntenti ħafna. 386 00:16:39,592 --> 00:16:42,550 DAVID J. Malan: Hu ma jafu dan ikun sejjer iseħħ, iżda CS50 stess, 387 00:16:42,550 --> 00:16:44,770 Danny Coffey, huwa dritt issa fil-kamra tal-kontroll. 388 00:16:44,770 --> 00:16:49,125 Iżda huwa dwar li tkun fuq l-internet, minħabba li llum hija birthday 29. 389 00:16:49,125 --> 00:16:51,865 390 00:16:51,865 --> 00:16:53,308 Come fuq barra Dan. 391 00:16:53,308 --> 00:16:57,160 392 00:16:57,160 --> 00:17:01,306 Jekk jogħġbok toħroġ, Dan, inkella dan huwa dwar li jkunu skomdi ħafna. 393 00:17:01,306 --> 00:17:04,010 Dan? 394 00:17:04,010 --> 00:17:08,040 Din is-sena huwa Dan Coffey, ma kinitx taf dan kien ser jiġri - aħna 395 00:17:08,040 --> 00:17:10,780 naturalment ħejjew dan. 396 00:17:10,780 --> 00:17:20,980 Hekk kuntenti birthday 29, u aħna tama inti, tabilħaqq, sorpriż. 397 00:17:20,980 --> 00:17:23,741 Le, li, mod ieħor, mod ieħor. 398 00:17:23,741 --> 00:17:24,240 Nru kien. 399 00:17:24,240 --> 00:17:24,889 >> DAN COFFEY: Hemm immorru. 400 00:17:24,889 --> 00:17:26,430 >> DAVID J. Malan: Dan Coffey, kulħadd. 401 00:17:26,430 --> 00:17:28,460 Grazzi ħafna Dan, għall ġejjin out. 402 00:17:28,460 --> 00:17:32,400 U issa, 60 sekonda ta 'pandas. 403 00:17:32,400 --> 00:17:33,676 >> [VIDEO Daqq] 404 00:17:33,676 --> 00:17:36,156 >> [Daqq tal-mużika] 405 00:17:36,156 --> 00:18:32,077 406 00:18:32,077 --> 00:18:32,910 [Video daqq END] 407 00:18:32,910 --> 00:18:34,670 DAVID J. Malan: Issa inti tista ' recall minn episodju reċenti, 408 00:18:34,670 --> 00:18:37,830 li aħna introdotti LaunchCode, l- inizjattiva f'Saint Louis, Missouri, 409 00:18:37,830 --> 00:18:40,200 mmexxija minn voluntiera li ġew wara flimkien 410 00:18:40,200 --> 00:18:43,304 ma 'curriculum CS50 u ċittadini ta 'gwida tal Saint Louis 411 00:18:43,304 --> 00:18:46,470 permezz dak il-materjal lejn l-aħħar ta ' tgħin biex pair mal-programmazzjoni 412 00:18:46,470 --> 00:18:48,530 impjiegi fl-aħħar tas-semestru. 413 00:18:48,530 --> 00:18:51,360 Inti tista 'tfakkar fil-fatt, li din l-inizjattiva kien tant popolari 414 00:18:51,360 --> 00:18:55,749 f'Saint Louis, li huma kważi fawrien l-dar opra lokali. 415 00:18:55,749 --> 00:18:57,540 Ukoll, LaunchCode tal fundaturi graciously ħafna 416 00:18:57,540 --> 00:18:59,610 waslet għall-kampus reċentement u qablu li joqogħdu bilqegħda 417 00:18:59,610 --> 00:19:02,830 magħna fil Sanders Teatru għal chat dwar dak LaunchCode hu 418 00:19:02,830 --> 00:19:04,589 u kif huwa kien għaddej. 419 00:19:04,589 --> 00:19:07,880 DAVID J. Malan: Aħna qiegħdin hawnhekk illum ma tagħna ħbieb minn LaunchCode li tittajjar 420 00:19:07,880 --> 00:19:10,410 fl-triq kollha minn St Louis jgħidu bonjour. 421 00:19:10,410 --> 00:19:11,279 Hello kulħadd. 422 00:19:11,279 --> 00:19:12,070 JIM MCKELVEY: Hello. 423 00:19:12,070 --> 00:19:14,819 DAVID J. Malan: Min għandna hawn magħna llum minn LaunchCode. 424 00:19:14,819 --> 00:19:16,304 JIM MCKELVEY: Allura, jien Jim MCKELVEY. 425 00:19:16,304 --> 00:19:17,720 Brendan LIND: U jien Brendan Lind. 426 00:19:17,720 --> 00:19:19,050 ZACH LOU: U jien Zach Lou. 427 00:19:19,050 --> 00:19:20,020 DAVID J. Malan: U għal dawk familjari, 428 00:19:20,020 --> 00:19:22,005 Tista 'tgħidilna ftit dwar dak LaunchCode hu? 429 00:19:22,005 --> 00:19:24,380 >> JIM MCKELVEY: So LaunchCode hija sistema pjazzament tax-xogħol 430 00:19:24,380 --> 00:19:26,880 li aħna pijunier jibda fl St Louis, 431 00:19:26,880 --> 00:19:28,600 imma aħna qed tmur biex iġibu nazzjon. 432 00:19:28,600 --> 00:19:31,460 L-idea bażikament huwa li tinkiseb kumpaniji li jibdlu kiri tagħhom 433 00:19:31,460 --> 00:19:34,640 prattiki biex jaċċettaw nies li kredenzjali mhux tradizzjonali. 434 00:19:34,640 --> 00:19:39,350 Allura kif nafu, bħala programmaturi, li ħafna mill-aħjar programmaturi 435 00:19:39,350 --> 00:19:41,720 huma awto-mgħallma sa ċertu punt. 436 00:19:41,720 --> 00:19:44,869 U l-kumpaniji ma neċessarjament jirrikonoxxu 437 00:19:44,869 --> 00:19:46,160 dan fil-prattiki kiri tagħhom. 438 00:19:46,160 --> 00:19:49,240 Mela jekk int Coder tajba, inti xorta mhux bilfors 439 00:19:49,240 --> 00:19:51,080 jkollhom mod għal impjieg tajjeb. 440 00:19:51,080 --> 00:19:53,400 >> U hekk, aħna bdew jaħdmu ma 'kumpaniji mitt 441 00:19:53,400 --> 00:19:55,790 minn biljun dollaru ditti bħal Enterprise, 442 00:19:55,790 --> 00:19:59,670 u MasterCard, down għal żewġ-bniedem start-ups. 443 00:19:59,670 --> 00:20:03,720 U konna gotten lilhom kollha biex jaqblu li jieħdu kandidati LaunchCode fi, 444 00:20:03,720 --> 00:20:05,230 bażikament sistema ta 'apprendistat. 445 00:20:05,230 --> 00:20:07,920 >> DAVID J. Malan: U kif sirt taf Materjali CS50 fl-ewwel post. 446 00:20:07,920 --> 00:20:09,461 >> JIM MCKELVEY: Allura kien verament umoristiċi. 447 00:20:09,461 --> 00:20:14,310 Marti ħa online klassi tiegħek permezz Harvard Estensjoni. 448 00:20:14,310 --> 00:20:17,560 U hi ħadet Fall 2012 CS50. 449 00:20:17,560 --> 00:20:22,010 U waqt li konna, jien xjentist kompjuter permezz ta 'taħriġ. 450 00:20:22,010 --> 00:20:25,180 U so I kien qed jgħin tagħha permezz il-klassi, I kien qed jara dan. 451 00:20:25,180 --> 00:20:30,980 U hi qalet, tafu, dan huwa jiġu offruti online permezz EDX, 452 00:20:30,980 --> 00:20:36,960 u aħna qed tqegħid ta 'dawn in-nies, li għandhom kredenzjali tradizzjonali ftit li xejn, 453 00:20:36,960 --> 00:20:38,870 u aħna qed simili, dan ikun meraviljuż. 454 00:20:38,870 --> 00:20:40,540 Allura li kif aħna sab dwar dan. 455 00:20:40,540 --> 00:20:41,535 Permezz mara m, Anna. 456 00:20:41,535 --> 00:20:42,994 U tiegħek Harvard Program Estensjoni. 457 00:20:42,994 --> 00:20:44,201 DAVID J. Malan: Li umoristiċi. 458 00:20:44,201 --> 00:20:47,620 Huwa tali deċiżjoni żgħir, filwaqt tagħha il-klassijiet kellhom impatt bħal din mela. 459 00:20:47,620 --> 00:20:49,940 >> JIM MCKELVEY: Kien super xxurtjati. 460 00:20:49,940 --> 00:20:53,931 U konna verament eċċitati biex tara li inti guys kienu jaħdmu ma EDX 461 00:20:53,931 --> 00:20:56,430 u jagħmilha disponibbli, u il-materjali kollha supplimentari. 462 00:20:56,430 --> 00:20:58,840 U huwa meraviljuż riżorsi għat-taħriġ. 463 00:20:58,840 --> 00:20:59,590 DAVID J. Malan: OK. 464 00:20:59,590 --> 00:21:02,596 Ukoll, fil-aħbarijiet, aħna fil-fatt sab ħarsa 465 00:21:02,596 --> 00:21:05,720 lejn dak li l-ewwel lejl tal LaunchCode kien meta inti kienu fil-dar opra. 466 00:21:05,720 --> 00:21:07,520 Inti tista 'tagħtina kont firsthand ta 'dak 467 00:21:07,520 --> 00:21:09,840 esperjenza tiegħek kien simili li filgħaxija? 468 00:21:09,840 --> 00:21:11,880 >> JIM MCKELVEY: Yeah, so I kien f'Ruma. 469 00:21:11,880 --> 00:21:14,950 U Brendan imsejħa me fi 3:00 fil-għodu, u qal, 470 00:21:14,950 --> 00:21:17,140 konna fawrien tliet postijiet. 471 00:21:17,140 --> 00:21:21,360 Allura kellna l-Knisja Kristu Katidral, il-Librerija Downtown, 472 00:21:21,360 --> 00:21:24,520 u l-Memorial Suldati, li tliet postijiet pjuttost kbar. 473 00:21:24,520 --> 00:21:26,390 U aħna kienu qed jistennew ftit mijiet ta 'nies. 474 00:21:26,390 --> 00:21:28,550 Kellna aktar minn 1,000 ruħ jiffirmaw. 475 00:21:28,550 --> 00:21:30,890 Allura aħna fawrien kollox u Brendan jitlob me, 476 00:21:30,890 --> 00:21:33,840 simili, għandna bżonn ta 'bini akbar. 477 00:21:33,840 --> 00:21:36,370 U li ltqajna us dan ġgant, dan opra ġgant 478 00:21:36,370 --> 00:21:38,717 house, fejn aħna kellhom l-ewwel klassi. 479 00:21:38,717 --> 00:21:40,050 DAVID J. Malan: Oh li l-kbir. 480 00:21:40,050 --> 00:21:42,590 JIM MCKELVEY: And nies kienu hekk grat. 481 00:21:42,590 --> 00:21:45,930 I mean, il-persuni li aħna qed jilħqu l 482 00:21:45,930 --> 00:21:48,089 nies li inti biss jixtiequ biex jgħin lil dawn folks. 483 00:21:48,089 --> 00:21:50,630 DAVID J. Malan: U minn dak inti stajt tidher, kemm realistiku 484 00:21:50,630 --> 00:21:53,460 huwa, xi ħadd li jidħol fil- kors bl-ebda sfond qabel. 485 00:21:53,460 --> 00:21:56,150 U xi xhur wara, ikollhom 13-il ġimgħa ta 'CS50 486 00:21:56,150 --> 00:21:58,310 taħt ċinturin tagħhom li attwalment jħossuhom kunfidenti biżżejjed 487 00:21:58,310 --> 00:22:01,000 u jkun kwalifikat biżżejjed għall- xogħol ta 'programmar attwali. 488 00:22:01,000 --> 00:22:03,590 >> JIM MCKELVEY: Allura David, aħna verament ma nafx, OK? 489 00:22:03,590 --> 00:22:06,770 Minħabba li aħna ma għamlu dan fi kwalunkwe tip ta 'skala s'issa. 490 00:22:06,770 --> 00:22:10,910 You know, punti tad-data tagħna dritt issa huma dak li stajt tgħallmu kien possibbli. 491 00:22:10,910 --> 00:22:13,533 U allura l-50 xi nies li konna mqiegħda, 492 00:22:13,533 --> 00:22:15,200 nafu ġeneralment fejn huma. 493 00:22:15,200 --> 00:22:18,270 U raden tagħna huwa li xi ħadd li jiāi permezz CS50 494 00:22:18,270 --> 00:22:21,397 se tkun ġeneralment bħala tas-sengħa/ta bħala xi 495 00:22:21,397 --> 00:22:23,480 tal-poplu li għandna diġà mqiegħda b'suċċess. 496 00:22:23,480 --> 00:22:25,620 >> Allura aħna ma wrewx iskala tiegħu għadu. 497 00:22:25,620 --> 00:22:29,140 U jien ma tgħid li huwa jitlesta fl-edukazzjoni bi kwalunkwe mezz. 498 00:22:29,140 --> 00:22:31,990 Iżda huwa tali bidu kbir. 499 00:22:31,990 --> 00:22:33,640 U tagħti lin-nies f'kuntest. 500 00:22:33,640 --> 00:22:36,310 U wkoll, tafu, huwa klassi rigoruża. 501 00:22:36,310 --> 00:22:40,020 Allura xi ħadd li tikkompleta dan klassi wera xi ħaġa. 502 00:22:40,020 --> 00:22:43,175 Li ħadthom wrew xi karattru jew kombinazzjoni ta 'inti 503 00:22:43,175 --> 00:22:48,170 taf, jew tenaċità jew intelligence, jew kwalunkwe li formula maġika hija 504 00:22:48,170 --> 00:22:51,660 li gets lilhom permezz il-klassi pretty iebsa, 505 00:22:51,660 --> 00:22:54,420 naħsbu li għaddej biex bode tajjeb ħafna għas-suċċess tagħhom. 506 00:22:54,420 --> 00:22:57,340 U aħna għandna kumpaniji li huma lesti li back up fuq dan. 507 00:22:57,340 --> 00:22:59,700 Għalhekk, hekk aħna ma verament jafu. 508 00:22:59,700 --> 00:23:03,630 Iżda aħna qed ottimista ħafna li xi ħadd li jottjeni permezz CS50, 509 00:23:03,630 --> 00:23:06,080 nistgħu tikseb impjieg. 510 00:23:06,080 --> 00:23:09,320 >> Brendan LIND: U l-ħaġa hija li LaunchCode mhux 511 00:23:09,320 --> 00:23:11,120 bħall-kiri tiegħek tipiċi livell tad-dħul. 512 00:23:11,120 --> 00:23:13,870 Dritt, mhuwiex fejn inti jiġu u jgħidu 513 00:23:13,870 --> 00:23:16,410 normalment jista 'jkollok bżonn C.S. grad u sentejn ta 'xogħol 514 00:23:16,410 --> 00:23:18,800 esperjenza biex jiksbu lott ta 'l-impjiegi, id-dritt? 515 00:23:18,800 --> 00:23:22,680 Iżda mbagħad, LaunchCode tidħol fi, inti m'għandhomx bżonn xi waħda minn dawk l-affarijiet. 516 00:23:22,680 --> 00:23:24,620 Inti ma għandekx bżonn li tkun kkwalifikati għal dak il-punt. 517 00:23:24,620 --> 00:23:26,370 Fejn inti għandek tkun huwa jkollu dik aptitude 518 00:23:26,370 --> 00:23:27,780 u sewqan biex jiksbu dak il-livell. 519 00:23:27,780 --> 00:23:28,960 Allura huwa apprendistat. 520 00:23:28,960 --> 00:23:31,920 U li ddum sakemm int f'dak il-livell, fejn 521 00:23:31,920 --> 00:23:34,040 inti tkun miġjuba għall-pożizzjoni normali. 522 00:23:34,040 --> 00:23:35,910 U l-kumpanija tista 'tħalli inti tmur fi kwalunkwe punt. 523 00:23:35,910 --> 00:23:38,000 >> DAVID J. Malan: Allura l-kumpaniji huma dawk li jagħmlu, finalment, 524 00:23:38,000 --> 00:23:39,177 li s-sħubija inizjali. 525 00:23:39,177 --> 00:23:40,010 Brendan LIND: Dritt. 526 00:23:40,010 --> 00:23:43,045 Allura dak CS50 - dak li aħna qed jagħmlu tipprova tagħmel ma 'CS50 527 00:23:43,045 --> 00:23:46,320 huwa twassalhom sal-punt fejn imbagħad, ħej jekk inti tista 'tieħu CS50, 528 00:23:46,320 --> 00:23:48,620 bħal ikollok dak drive, inti għandek li se jitgħallmu, 529 00:23:48,620 --> 00:23:53,460 u inti għandek li kapaċità li awto-jitgħallmu u jaħdmu fil-kumpanija, 530 00:23:53,460 --> 00:23:56,160 biex jimmaniġġaw kwalunkwe huwa li hija meħtieġa. 531 00:23:56,160 --> 00:23:58,530 U allura nistgħu tikseb minnhom, aħna tikseb minnhom fil-bieb. 532 00:23:58,530 --> 00:24:02,640 U dawn jitħallsu, dawn jitħallsu $ 15 siegħa għall-apprendistat tul. 533 00:24:02,640 --> 00:24:05,880 U kull meta dawn lest, il-kumpanija dawriet tagħhom fiċ-pożizzjoni bis-salarju. 534 00:24:05,880 --> 00:24:08,570 Jekk huma ma jagħmlux hekk, jekk il-kumpanija ma jaħsbu li dawn qed fit-triq tagħhom, 535 00:24:08,570 --> 00:24:09,445 jistgħu jħallu lilhom imorru. 536 00:24:09,445 --> 00:24:14,750 U s'issa, li s-suċċess hija li pretty ħafna kulħadd għadu 537 00:24:14,750 --> 00:24:15,630 mal-kumpanija tagħhom. 538 00:24:15,630 --> 00:24:16,540 >> DAVID J. Malan: OK. 539 00:24:16,540 --> 00:24:18,350 Allura issa dritt int iffukat fuq Saint Louis, 540 00:24:18,350 --> 00:24:20,880 imma jien jiġbru li inti tixtieq jieħdu l-inizjattiva nazzjonalment. 541 00:24:20,880 --> 00:24:22,790 Allura dak li huwa tabilħaqq jmiss għalik? 542 00:24:22,790 --> 00:24:25,630 >> JIM MCKELVEY: Allura li jmiss huma serje ta 'bliet madwar il-pajjiż. 543 00:24:25,630 --> 00:24:28,710 Allura, aħna ma rridux li jmorru nazzjonali sakemm aħna jirfinaw il-mudell, 544 00:24:28,710 --> 00:24:32,470 u forsi stabbiliti koppja ta 'dawk bankini permezz tal-ħmieġ. 545 00:24:32,470 --> 00:24:34,830 It-tlestija ta 'din ewwel klassi CS50 huwa 546 00:24:34,830 --> 00:24:38,080 se tkun verament importanti, għaliex aħna jkollna data tajba minn dik. 547 00:24:38,080 --> 00:24:43,079 Imma ladarba nafu x'jaħdem u x'ma aħna verament għandha tkun qiegħda tagħmel u skalar, 548 00:24:43,079 --> 00:24:45,120 allura aħna qed tmur għall-iskala malajr kemm jista 'jkun, 549 00:24:45,120 --> 00:24:46,710 minħabba l-ħtieġa teżisti kullimkien. 550 00:24:46,710 --> 00:24:50,260 U aħna mhux qed tipprova tagħmel dan xi tip ta 'lokali, Saint Louis fenomenu. 551 00:24:50,260 --> 00:24:52,740 Aħna biss użu li bħala sodda tat-test. 552 00:24:52,740 --> 00:24:55,900 U allura aħna ser tespandi inti taf, malajr kemm nistgħu 553 00:24:55,900 --> 00:24:58,160 għall-postijiet li għandhom bżonnijiet simili. 554 00:24:58,160 --> 00:25:00,070 >> DAVID J. Malan: Well, grazie tant ħafna għal kollox inti kont qed tagħmel. 555 00:25:00,070 --> 00:25:01,610 Aħna qed flattered li anki jkunu parti minnha. 556 00:25:01,610 --> 00:25:02,660 Huwa kien pjuttost ispirazzjoni. 557 00:25:02,660 --> 00:25:03,660 >> JIM MCKELVEY: Grazzi. 558 00:25:03,660 --> 00:25:08,610 Dan kien tant ġenerużi ta ' biss l-edukazzjoni ta 'klassi dinjija li 559 00:25:08,610 --> 00:25:12,660 huwa disponibbli għall-persuni li ġenwinament japprezzaw dan. 560 00:25:12,660 --> 00:25:14,410 Nixtieq inti tista 'tissodisfa xi wħud mill-istudenti 561 00:25:14,410 --> 00:25:18,470 u ara l-persuni li inti jafu, huwa tinbidel ħajja. 562 00:25:18,470 --> 00:25:22,610 I u biss jixtiequ nistgħu jilħqu permezz il-kameras u jġibu lilhom hawnhekk. 563 00:25:22,610 --> 00:25:25,090 Imma hija tant sinifikanti. 564 00:25:25,090 --> 00:25:28,189 U huwa li jiċċaqalqu-labra u huwa verament tajba. 565 00:25:28,189 --> 00:25:28,730 Allura nirringrazzjak. 566 00:25:28,730 --> 00:25:29,980 >> DAVID J. Malan: Thank inti minna ukoll. 567 00:25:29,980 --> 00:25:30,900 Japprezzaw dan. 568 00:25:30,900 --> 00:25:33,660 569 00:25:33,660 --> 00:25:35,660 Grazzi tant għall-jingħaqdu magħna. 570 00:25:35,660 --> 00:25:39,550 launchcodestl.com għal aktar. 571 00:25:39,550 --> 00:25:43,109 >> Allura aħna ltqajna chat ftit wara li chat dwar dak li aktar stajna nagħmlu. 572 00:25:43,109 --> 00:25:44,400 U aħna daħal fuq dan li ġej. 573 00:25:44,400 --> 00:25:48,010 Aħna hekk pjaċir iħabbru l- ewwel qatt CS50 Hackathon li 574 00:25:48,010 --> 00:25:50,500 se jkunu għaddejjin fuq il- triq għall Saint Louis. 575 00:25:50,500 --> 00:25:51,780 L-edizzjoni LaunchCode. 576 00:25:51,780 --> 00:25:54,230 Fil-fatt, aħna se tkun qed tieħu magħna, jekk inti tixtieq li jilħqu dawn folks. 577 00:25:54,230 --> 00:25:56,563 Jekk inti stess silġ minn St Louis, jew finalment 578 00:25:56,563 --> 00:25:59,850 bħal biex tixgħel online, CS50 tal Andrew stess se jkun hemm. 579 00:25:59,850 --> 00:26:04,720 CS50 tal Chang, Colton, Dan, min inti biss sodisfatti, 580 00:26:04,720 --> 00:26:11,040 Devin, Gabriel, Jason, Ramon, li inti wkoll sodisfatti qabel. 581 00:26:11,040 --> 00:26:15,920 Rob Bowden, Shelly, min inti tista ' tiftakar minn films bħal - 582 00:26:15,920 --> 00:26:17,370 u [? Zemaila?]. 583 00:26:17,370 --> 00:26:20,600 >> Hekk tabilħaqq, jekk inti tixtieq li jingħaqdu magħna fil St Louis jew online 584 00:26:20,600 --> 00:26:24,800 fil live.cs50.net, tixgħel għal l-ispettaklu live jmiss nhar il-Ġimgħa 585 00:26:24,800 --> 00:26:27,332 28 Marzu fi 6:00 pm ħin tal-Lvant. 586 00:26:27,332 --> 00:26:29,790 Aħna qed tmur biex tkun imqajjem għal pjuttost ftit sigħat li filgħaxija. 587 00:26:29,790 --> 00:26:32,170 U aħna nittamaw li intom ser jibqgħu up magħna ukoll. 588 00:26:32,170 --> 00:26:33,896 Li minnha għal CS50 Live din il-ġimgħa. 589 00:26:33,896 --> 00:26:35,770 Grazzi tant għal kulħadd wara l-kamera. 590 00:26:35,770 --> 00:26:37,320 Grazzi tant għall-kontributuri tagħna. 591 00:26:37,320 --> 00:26:39,880 Aħna ser tara int fl St Louis, dan kien CS50. 592 00:26:39,880 --> 00:27:07,810 593 00:27:07,810 --> 00:27:10,350 >> RAMON: X'tagħmel l-volpi jgħidu? 594 00:27:10,350 --> 00:27:31,146