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>> ROB BOWDEN: Sa a se nan
pi alèz seksyon,

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men sa pa vle di ke si ou
santi tankou ou pa plis konfòtab

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ou pa pral aprann bagay sa yo isit la.

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Se konsa, kite a jwenn te kòmanse.

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ou gen glisad
ale dwat nan bagay sa yo.

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Èske mwen sou yo jis pran li kounye a?

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Oblije chanje laptops.

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>> ALLISON: Ou pa vle
prezante tèt ou, Rob?

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>> ROB BOWDEN: Oh, mwen se Rob.

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Sa a se senkyèm ane CS50 TF-ING mwen.

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>> GABRIEL: Mwen Gabriel.

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Mwen se tèt TF nan CS50.

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Mwen te TF ane pase a ak ane sa a.

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ALLISON: Epi mwen Alison, ak sa a
se dezyèm ane CS50 TF-ING mwen.

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>> ROB BOWDEN: Tout dwa, se konsa
bagay sa a sou bò gòch,

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èspere ke ou te wè l 'devan.

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Si ou pa paske ou
telechaje li pou tèt ou,

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ou ta dwe gen pou wè li nan konferans.

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Se konsa, sa a se aparèy la CS50, epi li
te fè yon ti jan nan yon deskripsyon nan li

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nan konferans.

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Men, fondamantalman li nan jis ou
se kouri yon operasyon

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sistèm opere ou nan lespas
sistèm pou nou ka ba ou

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pwogram san yo pa bezwen
enkyete, o se sa a

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pwal travay sou tou de fenèt
ak Mac, oswa si kèk nan nou

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yo deja lè l sèvi avèk Linux, Linux.

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Li nan jis sipoze
gen yon jwe komen

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jaden se konsa tout moun gen nan
menm anviwònman egzak.

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>> Se konsa, si ou pa gen
telechaje sa a deja,

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ou ta dwe telechaje li, paske ou se
ale nan bezwen li pou mete nan pwoblèm.

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Epi li se yon jigokte de
download, se konsa li ta ka pran yon ti moman.

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Sou Harvard la li pral ale vit.

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Se konsa, CS50 aparèy.

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>> Koulye a, nan konmansman an, nou ap ale nan
pale sou jis yon pakèt moun sou liy lòd

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bagay, e konsa pa sa, mwen vle di k ap travay
nan sa a anviwònman ti kras plis pase isit la.

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Ak Avi tout bagay
Mwen di dwa isit la kounye a

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yo ale nan travay si w ap andedan nan
yon tèminal andedan nan aparèy la,

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oswa si ou se andedan nan
fenèt la tèminal jdi

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andedan nan aparèy la.

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Se konsa, moun anviwònman yo ki idantik.

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>> Men, mwen pral ale yon wout twazyèm.

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Ak Avi sa a desann isit la
ti kras adrès IP dwa isit la.

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Se konsa, ou pa bezwen
fè sa, men sa a IP

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address-- kounye a si I-- eksepte
li nan ki te bloke pa bagay sa a.

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OK, se konsa ke adrès IP
sou nan yon tèminal

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isit la ki se tèminal sa a sou
isit la se yon tèminal nan Mac mwen.

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Se konsa, sa a se nan okenn fason kounye a
ki asosye ak aparèy la nan tout.

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Epi si w ap sou Windows, Lè sa a, w ap
ale nan bezwen download yon bagay

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espesyalman pou sa a, an patikilye
moun ki gen tandans sèvi ak mastik, P-U-T-T-Y.

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>> Se konsa, sa m ap pral fè se kalite
SSH ak Lè sa a ki adrès IP.

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Oke, jharvard nan ki adrès IP.

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Se konsa, 192.168.24.220.

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Mesaj pè sa a, inyore li.

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Jis tape repons lan se wi.

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Sa a se CS50 nan yon bwat.

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Li mande pou modpas ou.

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>> Se konsa, nan yon anpil nan kontèks sa yo kote
li mande pou modpas la, [fèbl].

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Nou te gen yon anpil nan kesyon ki kote
li di li nan pa aktyèlman tape.

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Li pa montre w karaktè yo nan
modpas la kòm ou tape, si anyen,

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pou yon karakteristik sekirite, paske si
yon moun se kap sou zepòl ou

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epi yo wè zetwal zetwal
etwal etwal, lè sa a yo

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konnen ke modpas ou
se kat karaktè.

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Se konsa, lide a se li pral mande
ou pou modpas ou, kalite.

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Li pa nan pral montre
ou karaktè yo,

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men li la aktyèlman aksepte yo.

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Nan ka sa a, nenpòt ki lè ou
janm wè yon èd memwa modpas

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fè fas ak aparèy la, nan
modpas a pwal wouj.

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Se konsa, twal lenn tou.

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>> Epi, koulye a isit la andedan nan sa a
fenèt ki nan Mac mwen an,

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Mwen fondamantalman gen
menm gade nan egzak

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kòm andedan nan yon tèminal
nan aparèy la.

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Se konsa, ou pa bezwen fè sa.

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Ou ka fè tout bagay ou
vle andedan nan aparèy la.

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Mwen prèske pa janm aktyèlman fè
anyen nan aparèy la.

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Mwen prèske toujou misyon pou minimize ki e kounye a,
Mwen ap travay sch nan aparèy la.

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>> Si anyen, si ou
gen yon òdinatè pi dousman,

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ou ta ka avi yon diferans.

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Mwen fè sa paske mwen ta pito
fenèt tèminal sa a.

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Li te gen kèk karakteristik tankou
Mwen ka fann fennèt la,

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e kounye a, mwen kapab sch nan
a aparèy la.

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Mwen te resevwa de sch k ap pase sou nan yon fwa.

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Si òdinatè w lan se patikilyèman ralanti
ak w ap k ap travay nan aparèy la,

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epi ou reyalize sa a se
reyèlman laggy, kèlkeswa sa.

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Gen tandans ka anpil pi vit
si w ap sch-ed nan.

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Men, otreman ou ka travay swa fason.

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>> ODYANS: Ki sa ki sch vle di?

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>> ROB BOWDEN: kokiy Tache,
yon bagay tankou sa?

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Ki sa ki sch vle di?

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GABRIEL: Tache koki.

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ALLISON: Se jis an sekirite koki.

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ROB BOWDEN: Tache koki.

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Li se yon pwotokòl ki you-- li nan
yon pwotokòl sekirite, se konsa chiffres.

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Moun pa kapab Snoop rezo a ak
wè sa ki w ap di nan anyen

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w ap sch-ed.

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Ak an reyalite, nan vyeu la
jou ki vini apre CS50, se konsa an 2009

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lè m 'te yon elèv nevyèm ane, fason ke
ou te travay sou CS50 aparèy televisyon HD pwoblèm,

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te ou SSH-ed nan kèk sèvè
ke nou te bay ou gen aksè nan,

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epi ou te travay sou la.

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Se konsa, ou pa t 'gen sa a
grafik aparèy.

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Ou pa t 'gen jdi.

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Ou pa t 'gen tout bagay sa yo ki
ou ta ka vizyèlman pwen, epi klike.

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Ou te gen nan travay nan sa a koòdone.

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Mwen ta pito travay nan sa a koòdone.

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Se konsa, yon pati nan ki sa nou ap ale
yo dwe ale plis pase kounye a

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yo se yon pakèt moun sou la
kòmande ke ou ta dwe

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kòmanse jwenn abitye ak jan
ou ale ansanm nan kou a.

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E franchman, yon fwa ou
jwenn itilize yo, li

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se konsa anpil pi vit
travay nan anviwonman sa a

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pase sa li se yo travay avèk Chèche,
trenen ak klike bagay sa yo.

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>> Se konsa, isit la nou yo.

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Koulye a, mwen jis SSH-ed nan, epi konsa
default la location-- ou

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wè kèk nan kòmandman sa yo nan klas la,
men nou pral ale sou tout nan yo ankò.

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Kote a default nou ap
nan se anyè a lakay ou.

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Ak anyè, jis
yon lòt mo pou katab.

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Se konsa, nou ap nan anyè a lakay ou.

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Tape ls, lis dosye yo
nan anyè sa a.

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Sanble mwen kreye yon blah.c pi bonè.

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Se konsa, nou gen yon anyè Desktop.

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Ou remake makè yo sentaks?

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Makè nan limyè ble endike
yon anyè ak blan a dwat

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endike jis yon dosye plenn.

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Se konsa, gen yo pral yo dwe
kèk koulè lòt ou wè.

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Yon dosye ègzèkutabl se pwobableman pral
yo dwe vèt, oubyen yon bagay tankou sa.

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OK, se konsa nou se nan anyè a lakay ou.

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>> Koulye a, si mwen vle ale nan yon diferan
anyè, CD se yo lòd, ki mwen vle.

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Se konsa, chanje anyè, ak Lè sa a ou
pase non an nan anyè a

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ke ou vle ale nan.

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Se konsa, isit la nou gen kat opsyon.

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Mwen ka ale nan downloads, epi kounye a nou wè
isit la li te mete ajou sa a parantèz

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yo di mwen se nan ~ / downloads.

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>> Se konsa, sa a se tild?

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Li se yon steno pou
anyè lakay ou.

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Se konsa, prèske tout bagay ou fè ki pral
gen ki gen rapò ak anyè lakay ou,

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ak PWD se jis yon lòd
Mwen sèvi ak yon fwa nan yon ane ki

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jis simagri anyè aktyèl la.

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Se konsa, ou wè isit la ke
~ / Downloads reyèlman rezoud

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/ Home / jharvard / downloads.

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Se konsa, / Home / jharvard se anyè lakay mwen.

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>> Se konsa, nou ka CD dot dot.

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Koulye a, dot dot se yon anyè espesyal ki
toujou refere a yon sèl anyè a leve.

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Se konsa, si mwen se nan ~ / downloads, lè sa a CD dot
dot ki pral pote m 'nan tild.

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Ki sa nou panse CD dot dot
ki pral pote m 'nan kounye a?

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Li pral pote m 'nan / Home.

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Se konsa, tild pa ekri ak lèt ​​detache anyè k ap travay,
Mwen nan kounye a / Home / jharvard.

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yon sèl anyè moute soti nan sa,
kounye a li di isit la / kay la.

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>> Koulye a, CD dot dot.

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Koulye a, mwen nan anyè a rasin,
epi ou pa ka fè l 'ankò.

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Ou ap jis rete nan a
anyè rasin pou tout tan.

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Anyè a rasin gen yon pakèt antye nan
bagay sa yo ke, si ou vle gade nan,

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ou kapab.

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Pou egzanp, si mwen ale
nan bin, ki gen

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tout binèr sa yo, tankou ls,
ak CD, ak tout nan bagay sa yo.

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Se konsa, kòmandman sa yo bezwen
egziste yon kote nan sistèm nan,

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ak li nan nan anyè a / bin.

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Men, prèske tout bagay ou fè se
pral fè nan anyè lakay ou.

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Epi CD san okenn agiman tou sa,
ou ta ka di CD ~, pa bezwen.

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cd ki pral pote ou
tounen nan anyè lakay ou.

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>> Youn nan dènye yon sèl.

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cd - ki pral fè ou tounen nan
dènye anyè a ke ou te nan.

190
00:09:00,200 --> 00:09:04,080
Se konsa, mwen jis cd'd de fwa nan yon ranje, se konsa mwen
anyè pase a te anyè a lakay ou.

191
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Si m 'ale nan koupe bin, epi kounye a
kite yo ale leve, li antre nan itilizatè.

192
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193
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Itilizatè pataje.

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Ann ale nan itilizatè pataje.

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Koulye a, mwen kounye a nan itilizatè pataje.

197
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cd -, li tounen nan bin.

198
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Se konsa, sa a vin patikilyèman itil
lè ou have-- epi li pral aktive.

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Se konsa, itilizatè pataje, tounen bin, pataje bin.

200
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>> Se konsa, sa a vin itil.

201
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Ou kapab jwenn tèt ou gen anpil moun,
anpil, anpil repèrtwar enbrike.

202
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Epi ou vle fè yon bagay
reyèl rapid nan yon anyè anwo kay la.

203
00:09:37,370 --> 00:09:40,330
Ou ale nan ke anyè, fè
chanjman ak lòt bagay tankou sa yo,

204
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e kounye a, ou vle ale
tounen nan kote ou te.

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cd -.

206
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Mwen toujou fristre
lè m 'rive yo ale

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ak sa yo ki anyè mwen
te vle fè travay nan.

208
00:09:49,630 --> 00:09:52,670
Mwen toujou jwenn fristre lè m 'te fè
li nan de etap olye pou yo yon sèl etap,

209
00:09:52,670 --> 00:09:55,715
paske sa vle di ke CD - ki pral
yo pote nan ki kote entèmedyè

210
00:09:55,715 --> 00:09:57,010
olye pou yo kote mwen vle ale.

211
00:09:57,010 --> 00:09:59,350

212
00:09:59,350 --> 00:10:01,450
>> Se konsa, nou wè tout lis dosye yo.

213
00:10:01,450 --> 00:10:03,300
Nou konnen ki jan jwenn alantou byen lwen tèlman.

214
00:10:03,300 --> 00:10:09,900
Se konsa, kounye a kite a pale sou koreksyon dosye.

215
00:10:09,900 --> 00:10:18,790
Se konsa, nan kou sa a, w ap prèske
toujou espere yo sèvi ak jdi.

216
00:10:18,790 --> 00:10:24,410
Si ou vle, ou ka pran pwochen etap la
epi yo kòmanse aprann yon tèks liy lòd

217
00:10:24,410 --> 00:10:25,240
editè.

218
00:10:25,240 --> 00:10:27,560
Se konsa, opsyon divès kalite egziste.

219
00:10:27,560 --> 00:10:31,760
>> Ak sa yo ki yo se pwobableman
pral fè ki enpòtan ba ou,

220
00:10:31,760 --> 00:10:35,340
nou gen Nano, vim, ak anak.

221
00:10:35,340 --> 00:10:40,196
Se konsa, Nano se débutan yo
liy lòd editè tèks.

222
00:10:40,196 --> 00:10:42,985
Se konsa, kite a Nano ale sou
blah.c mwen te kreye pi bonè.

223
00:10:42,985 --> 00:10:44,030

224
00:10:44,030 --> 00:10:46,480
Se jis sa a ranpli estanda C.

225
00:10:46,480 --> 00:10:51,540
Epi ou wè yon pakèt antye nan bagay
ale sou nan pati anba a nan ekran an,

226
00:10:51,540 --> 00:10:54,100
ak aparamman blah.c
gen sa a kòd C.

227
00:10:54,100 --> 00:10:55,420

228
00:10:55,420 --> 00:11:00,330
>> Se konsa, nan editè sa a an patikilye,
ki sa li la di nan bottom-- la

229
00:11:00,330 --> 00:11:06,290
kounye a sa a senbòl Lambda,
nou wè sa a ^ G, ^ X, ^ O.

230
00:11:06,290 --> 00:11:10,310
Se konsa, ki nan prèske tout
kontèks sa ou wè,

231
00:11:10,310 --> 00:11:13,530
ou ta ka wè ke senbòl Lambda nan
lòt kote sou entènèt, sou Stack Depatman,

232
00:11:13,530 --> 00:11:14,450
yon bagay tankou sa.

233
00:11:14,450 --> 00:11:16,970
Li prèske toujou refere a kontwole.

234
00:11:16,970 --> 00:11:21,590
Se konsa, yo sòti mwen vle fè
Kontwòl X. Kontwòl X, sòti.

235
00:11:21,590 --> 00:11:22,750

236
00:11:22,750 --> 00:11:26,855
Apre sa, mwen ka itilize flèch mwen
kle pou avanse pou pi alantou.

237
00:11:26,855 --> 00:11:28,010

238
00:11:28,010 --> 00:11:31,015
Avi mwen pa ka montre Et Sur fasilman.

239
00:11:31,015 --> 00:11:33,000

240
00:11:33,000 --> 00:11:35,010
Ou bezwen sèvi ak flèch ou
kle pou avanse pou pi alantou.

241
00:11:35,010 --> 00:11:36,950
Gen ta kapab yon anviwònman
nan pwen, epi klike.

242
00:11:36,950 --> 00:11:40,000
>> Men, kite a fè kèk chanjman.

243
00:11:40,000 --> 00:11:42,100
Koulye a, kontwòl X yo ale sòti.

244
00:11:42,100 --> 00:11:44,120
Li nan ale nan di sove modifye tanpon.

245
00:11:44,120 --> 00:11:47,900
Koulye a, èd memwa, y la pou repons lan se wi, n pou pa gen okenn.

246
00:11:47,900 --> 00:11:49,900
Kontwòl C pou anile.

247
00:11:49,900 --> 00:11:50,780
Mwen pral jis di wi.

248
00:11:50,780 --> 00:11:51,709
File Non ekri.

249
00:11:51,709 --> 00:11:53,500
Default la se dosye a
ke li deja se.

250
00:11:53,500 --> 00:11:54,230
Frape Mete.

251
00:11:54,230 --> 00:11:54,740
OK.

252
00:11:54,740 --> 00:11:58,580
Koulye a, mwen te jis edited ki ranpli,
sove li, epi li se chanje.

253
00:11:58,580 --> 00:11:59,770

254
00:11:59,770 --> 00:12:03,000
>> Se konsa, Nano se pi fasil a
editè tèks jwenn itilize.

255
00:12:03,000 --> 00:12:05,520
Altènativ yo se vim ak anak.

256
00:12:05,520 --> 00:12:11,250
Moun sa yo se pi wo nivo editè tèks
ki gen yon trè forte koub apprentissage.

257
00:12:11,250 --> 00:12:13,740
Se konsa, preferans pèsonèl mwen an se vim.

258
00:12:13,740 --> 00:12:17,175
Epi li gen yon gran varyete opsyon.

259
00:12:17,175 --> 00:12:18,210

260
00:12:18,210 --> 00:12:24,070
E yon fwa ou jwenn itilize
nan li, ou pral pa janm

261
00:12:24,070 --> 00:12:26,900
vle ale nan nenpòt lòt
editè tèks paske ou jis

262
00:12:26,900 --> 00:12:29,590
gen bagay sa yo anpil
disponib nan ou nan sa yo,

263
00:12:29,590 --> 00:12:31,690
men sa pran yon vrèman
long tan yo aprann.

264
00:12:31,690 --> 00:12:36,000
Se konsa, petèt ou jis vle fòse
tèt ou kounye a jwenn itilize li,

265
00:12:36,000 --> 00:12:38,130
men mwen ta ka di li la vo li.

266
00:12:38,130 --> 00:12:39,660
Men, li se difisil.

267
00:12:39,660 --> 00:12:41,220
>> Lè sa a, anak.

268
00:12:41,220 --> 00:12:44,940
Mwen toujou ap lite nan anak paske
Mwen konnen ki jan fè absoliman anyen.

269
00:12:44,940 --> 00:12:47,755
Aparamman anak se pa pa default
enstale sou aparèy la.

270
00:12:47,755 --> 00:12:49,210

271
00:12:49,210 --> 00:12:51,720
Nou pral pwobableman ajoute ke
kòm yon enstalasyon default.

272
00:12:51,720 --> 00:12:59,620

273
00:12:59,620 --> 00:13:02,390
Yon fwa ou aprann youn nan
Vim oswa anak, gen nan

274
00:13:02,390 --> 00:13:04,810
okenn rezon konvenkan
tout tan tout tan aprann lòt la,

275
00:13:04,810 --> 00:13:07,570
men li la yon style konplètman diferan.

276
00:13:07,570 --> 00:13:10,460
OK pou ki nan koreksyon dosye tèks.

277
00:13:10,460 --> 00:13:13,374
>> ODYANS: Si yo te kole ou
nan vim kounye a, ki jan we--

278
00:13:13,374 --> 00:13:18,840

279
00:13:18,840 --> 00:13:20,800
>> ROB BOWDEN: Gen
miltip mòd nan vim,

280
00:13:20,800 --> 00:13:23,770
e gen tout antye
tutoryèl sou aprantisaj vim.

281
00:13:23,770 --> 00:13:27,390
Se konsa, si ou rive yo dwe
nan insert mòd yo nan lòd

282
00:13:27,390 --> 00:13:29,930
tape tèks, ki ou kapab
antre nan ke nan divès fason,

283
00:13:29,930 --> 00:13:31,610
men mwen se ki jan ou jwenn yo nan insert mòd.

284
00:13:31,610 --> 00:13:34,780
Nan oswa pou w jwenn soti nan nenpòt ki espesyal
mòd ki w ap nan, jis chape.

285
00:13:34,780 --> 00:13:37,640
Epi ou jis frape Kouri al nan jwenn
soti nan nenpòt ki mòd enbrike nan ou.

286
00:13:37,640 --> 00:13:40,360
Jis OK, kounye a mwen se tounen nan mòd nòmal.

287
00:13:40,360 --> 00:13:43,790
>> Se konsa, nan mòd nòmal, yon kolon.

288
00:13:43,790 --> 00:13:45,160
Ou wè li parèt nan pati anba a.

289
00:13:45,160 --> 00:13:46,240
Lè sa a, q.

290
00:13:46,240 --> 00:13:52,600
Se konsa, q pral kite fimen, si ou te fè chanjman,
ki I-- gen mwen te fè chanjman?

291
00:13:52,600 --> 00:13:54,180
Mwen te fè chanjman aparamman.

292
00:13:54,180 --> 00:13:57,264
Se konsa, si ou te fè chanjman, li pral
di ou ka mete yon mak esklamasyon.

293
00:13:57,264 --> 00:13:58,430
Mwen pral rele li yon Bang.

294
00:13:58,430 --> 00:14:02,040
Se konsa, ou ka mete yon entèdiksyon nan jis
kite san yo pa fè anyen,

295
00:14:02,040 --> 00:14:04,520
oswa kolon wk ap sove ak kite fimen.

296
00:14:04,520 --> 00:14:06,580
Se konsa, w an jeneral se ekri.

297
00:14:06,580 --> 00:14:08,300
Se konsa, ekri dosye a.

298
00:14:08,300 --> 00:14:09,810
Mwen ka ekri ak kite fimen.

299
00:14:09,810 --> 00:14:13,606
Oswa ou ta ka gen jis
QX slam, q Bang jis

300
00:14:13,606 --> 00:14:16,230
yo ka resevwa soti nan la kèlkeswa
nan nenpòt ki chanjman ke ou te fè fè yo.

301
00:14:16,230 --> 00:14:21,310

302
00:14:21,310 --> 00:14:28,940
>> Tout dwa, se konsa kounye a kite a
go-- nou ka kreye dosye.

303
00:14:28,940 --> 00:14:30,890
Ann kòmanse retire dosye.

304
00:14:30,890 --> 00:14:35,450
Apre sa, mwen pral jis jete nan yon sèl
rapid nouvo lòd, manyen.

305
00:14:35,450 --> 00:14:38,200
Se konsa, manyen foo.

306
00:14:38,200 --> 00:14:39,340
Touch ba.

307
00:14:39,340 --> 00:14:40,220
Manyen Baz.

308
00:14:40,220 --> 00:14:42,810
Si m 'ls, kounye a nou wè
ki sa yo dosye egziste.

309
00:14:42,810 --> 00:14:44,315
Yo ap konplètman vid.

310
00:14:44,315 --> 00:14:47,178
Se konsa, manyen se jis yon fasil
fason pou yon sèl, [fèbl].

311
00:14:47,178 --> 00:14:50,850

312
00:14:50,850 --> 00:14:54,640
De, teknikman jis nan eta
li, li mete ajou timèstanp yo.

313
00:14:54,640 --> 00:14:58,470
Se konsa, nenpòt ki dosye ke ou kreye gen
yon timestamp asosye ak li.

314
00:14:58,470 --> 00:15:01,330
Se konsa, te kreye Baz sou
Sèptanm 14 nan 16:21.

315
00:15:01,330 --> 00:15:02,570

316
00:15:02,570 --> 00:15:06,670
Li nan kounye a 16:22, kidonk si
Mwen manyen Baz ankò, nou

317
00:15:06,670 --> 00:15:11,420
wè ke Baz te pi
dènyèman modifye nan 16:22.

318
00:15:11,420 --> 00:15:17,680
Men, otreman mwen prèske pa janm
gade nan timèstanp yo sou dosye.

319
00:15:17,680 --> 00:15:20,490
Se konsa, touche, isit la mwen jis lè l sèvi avèk
li yo kreye kèk dosye rapid.

320
00:15:20,490 --> 00:15:21,620

321
00:15:21,620 --> 00:15:27,400
>> Tout dwa, se konsa kounye a RM se la
lòd ke nou pran swen sou isit la.

322
00:15:27,400 --> 00:15:28,665
Epi nou ka RM boo.

323
00:15:28,665 --> 00:15:31,000
Di retire regilye dosye boo vid.

324
00:15:31,000 --> 00:15:34,070
Apre sa, nou ka tape y, e kounye a, li nan supprime.

325
00:15:34,070 --> 00:15:34,850
RM Baz.

326
00:15:34,850 --> 00:15:35,910

327
00:15:35,910 --> 00:15:38,620
Retire dosye regilye vid
Baz ak kalite n pou pa gen okenn.

328
00:15:38,620 --> 00:15:40,060
Koulye a, li pa nan retire li.

329
00:15:40,060 --> 00:15:41,240
Se konsa, bar ak Baz toujou egziste.

330
00:15:41,240 --> 00:15:42,232
Man se ale.

331
00:15:42,232 --> 00:15:43,148
GABRIEL: Kenbe pale.

332
00:15:43,148 --> 00:15:43,970

333
00:15:43,970 --> 00:15:44,720
ROB BOWDEN: Great.

334
00:15:44,720 --> 00:15:45,800

335
00:15:45,800 --> 00:15:50,370
Se konsa, mesaj la anmèdan
isit la, retire empty-- regilye

336
00:15:50,370 --> 00:15:52,390
ki sa ou ap fè desann la?

337
00:15:52,390 --> 00:15:54,030
Retire dosye regilye vid.

338
00:15:54,030 --> 00:15:58,840

339
00:15:58,840 --> 00:16:01,610
Se konsa, si nou pa vle yo dwe
anmande pa ke mesaj,

340
00:16:01,610 --> 00:16:05,340
nou ka jete nan -f sa a
drapo, ak pou sa a, se fòs.

341
00:16:05,340 --> 00:16:11,330
Epi, koulye a si mwen RM -f, li nan pa ale nan
di ou vle retire sa a dosye.

342
00:16:11,330 --> 00:16:12,040
Li pral jis fè li.

343
00:16:12,040 --> 00:16:13,720
Epi ls, mwen pa wè ba gen ankò.

344
00:16:13,720 --> 00:16:14,810

345
00:16:14,810 --> 00:16:18,021
>> Koulye a, ki se yon potansyèlman
danjere lòd.

346
00:16:18,021 --> 00:16:19,020
Sa gen tandans pa twò move.

347
00:16:19,020 --> 00:16:22,240
Nou pral tounen vin nan yon dezyèm fwa ki jan
li ka jwenn reyèlman danjere.

348
00:16:22,240 --> 00:16:28,740
Li kite yo kreye kèk anyè temp.

349
00:16:28,740 --> 00:16:30,880
mkdir, yon lòt lòd.

350
00:16:30,880 --> 00:16:34,880
Se konsa, mkdir se yon lòd
ki fè yon anyè.

351
00:16:34,880 --> 00:16:40,650
Epi, koulye a pa ls nou wè limyè sa a bèl
ble make anyè temp.

352
00:16:40,650 --> 00:16:42,295
Mwen kapab CD nan temp.

353
00:16:42,295 --> 00:16:44,590
Apre sa, mwen ka mkdir foo.

354
00:16:44,590 --> 00:16:46,330
cd an foo. mkdir ba.

355
00:16:46,330 --> 00:16:46,860
cd an ba.

356
00:16:46,860 --> 00:16:49,400

357
00:16:49,400 --> 00:16:54,300
>> Se konsa, nou wè nou ka fasilman jwenn
nan kèk nidifikasyon trè gwo twou san fon.

358
00:16:54,300 --> 00:16:56,385
Koulye a, ki jan mwen retire yon anyè?

359
00:16:56,385 --> 00:16:57,020

360
00:16:57,020 --> 00:16:57,520
rmdir.

361
00:16:57,520 --> 00:16:59,030

362
00:16:59,030 --> 00:17:03,540
Se konsa, si mwen jis tou dwat eseye RM,
tankou nou te fè ak yon dosye regilye,

363
00:17:03,540 --> 00:17:06,420
RM ba ki pral
di pa kapab retire ba.

364
00:17:06,420 --> 00:17:07,569
Li se yon anyè.

365
00:17:07,569 --> 00:17:10,619
Genyen yon lòd espesyal pou
retire repèrtwar, kalite.

366
00:17:10,619 --> 00:17:12,900
Se konsa, rmdir ba.

367
00:17:12,900 --> 00:17:13,710
Koulye a, se ba ale.

368
00:17:13,710 --> 00:17:14,980

369
00:17:14,980 --> 00:17:22,680
>> OK, se konsa rmdir Mwen bèl anpil pa janm sèvi ak.

370
00:17:22,680 --> 00:17:32,220
Rezon ki fè la being-- kounye a kite a
fè yon bar dosye regilye nan isit la.

371
00:17:32,220 --> 00:17:34,780
Se konsa, rmdir boo.

372
00:17:34,780 --> 00:17:35,760
rmdir.

373
00:17:35,760 --> 00:17:36,900
Echwe pou pou retire foo.

374
00:17:36,900 --> 00:17:38,420
Anyè pa vid.

375
00:17:38,420 --> 00:17:43,420
Se konsa, ou pa ka sèvi ak retire dir sou yon
anyè ki gen bagay sa yo nan li.

376
00:17:43,420 --> 00:17:44,830
>> Se konsa, ou gen kèk opsyon.

377
00:17:44,830 --> 00:17:49,780
Ou ka ale nan ke anyè, retire
tout bagay manyèlman, ak Lè sa a soti

378
00:17:49,780 --> 00:17:51,759
ak rmdir anyè a.

379
00:17:51,759 --> 00:17:53,050
Sa evidamman son anmèdan.

380
00:17:53,050 --> 00:17:55,000
E si gen dè milye
nan dosye nan la?

381
00:17:55,000 --> 00:17:58,119
Oke, ou ta ka RM *.

382
00:17:58,119 --> 00:17:59,410
Nou pral pale sou * nan yon dezyèm fwa.

383
00:17:59,410 --> 00:18:00,870
Li fondamantalman vle di tout bagay sa yo.

384
00:18:00,870 --> 00:18:02,030

385
00:18:02,030 --> 00:18:05,470
Men, pi bon toujou, se konsa RM -r.

386
00:18:05,470 --> 00:18:10,220
Se konsa, RM -r-- nan yon anpil nan
kontèks, -r vle di repetitif,

387
00:18:10,220 --> 00:18:13,810
ki nou pral pale sou sa
vle di repetitif nan plizyè semèn.

388
00:18:13,810 --> 00:18:18,630
Men, li fondamantalman vle di Traverse
antye a nan anyè sa a

389
00:18:18,630 --> 00:18:20,190
epi retire tout bagay.

390
00:18:20,190 --> 00:18:24,420
>> Se konsa, RM foo -r ki pral di
desann anba nan anyè foo?

391
00:18:24,420 --> 00:18:25,210
Wi.

392
00:18:25,210 --> 00:18:26,800
Retire regilye vid dosye foo / bar?

393
00:18:26,800 --> 00:18:27,880

394
00:18:27,880 --> 00:18:28,540
Wi.

395
00:18:28,540 --> 00:18:29,760
Retire anyè foo?

396
00:18:29,760 --> 00:18:30,260
Wi.

397
00:18:30,260 --> 00:18:31,470

398
00:18:31,470 --> 00:18:35,020
Se konsa, kounye foo ak tout bagay
ki nan li te retire li.

399
00:18:35,020 --> 00:18:42,370
>> Koulye a, ki ka jwenn patikilyèman anmèdan
when-- kite nan manyen 1, manyen 2, manyen 3.

400
00:18:42,370 --> 00:18:44,400
Te kapab gen yon pakèt antye nan dosye.

401
00:18:44,400 --> 00:18:49,060
Si mwen te vle, mwen te kapab kreye
dè milye de dosye nan isit la.

402
00:18:49,060 --> 00:18:53,340
Epi RM foo -r ki pral
yo dwe trè anmèdan.

403
00:18:53,340 --> 00:18:55,374
Wi, repons lan se wi, se wi, repons lan se wi, se wi, wi.

404
00:18:55,374 --> 00:18:57,540
Avèk yon anpil plis dosye ou
byen vit wè konbyen fwa

405
00:18:57,540 --> 00:18:58,581
Mwen ta gen tape repons lan se wi.

406
00:18:58,581 --> 00:19:02,265
Oke, nou jis te wè anvan ki jan nou kapab
debarase m de bezwen yo tape repons lan se wi, -f.

407
00:19:02,265 --> 00:19:03,330

408
00:19:03,330 --> 00:19:07,020
Se konsa, mkdir foo CD foo manyen 1 2 3.

409
00:19:07,020 --> 00:19:08,380

410
00:19:08,380 --> 00:19:17,190
OK, se konsa RM foo -rf ki pral
je fèmen retire foo nèt.

411
00:19:17,190 --> 00:19:17,960
Pa gen èd memwa.

412
00:19:17,960 --> 00:19:18,650
Pa gen anyen.

413
00:19:18,650 --> 00:19:20,040
Man se ale.

414
00:19:20,040 --> 00:19:23,830
>> Se konsa, mwen gen tandans sèvi ak sa a
mande tout tan tout tan an.

415
00:19:23,830 --> 00:19:25,120

416
00:19:25,120 --> 00:19:27,830
Sa te di, li se yon
lòd trè danjere,

417
00:19:27,830 --> 00:19:33,240
paske si mwen fè yon bagay tankou
sa a, li pa pral fè w.

418
00:19:33,240 --> 00:19:34,730
Li pral ale.

419
00:19:34,730 --> 00:19:40,140
Epi bagay sa yo rive trè souvan,
e menm nan pi wo nivo kou CS.

420
00:19:40,140 --> 00:19:42,070
Pafwa nou pral wè
yon bagay kote yon moun

421
00:19:42,070 --> 00:19:48,360
di mwen aksidantèlman nou an RM RF-ed lakay mwen
se anyè ak tout nan P seri m 'ale.

422
00:19:48,360 --> 00:19:52,422
Lè li nan devastatè,
men gen nan pa gen fatra kapab.

423
00:19:52,422 --> 00:19:54,380
Gen nan pa gen okenn pa gen anyen
pou ou pou w rekipere.

424
00:19:54,380 --> 00:19:55,330
Li nan jis ale.

425
00:19:55,330 --> 00:19:56,529

426
00:19:56,529 --> 00:19:58,320
Menm pi mal ta dwe
yon bagay tankou RM -rf /.

427
00:19:58,320 --> 00:19:59,432

428
00:19:59,432 --> 00:20:01,140
Se konsa, nou jis diskite
ke anyè rasin.

429
00:20:01,140 --> 00:20:03,095
Lwa sa a bay tout nan la
dosye sou sistèm ou an.

430
00:20:03,095 --> 00:20:04,120

431
00:20:04,120 --> 00:20:07,380
Bagay sa yo gen tandans jwenn bèl sal
lè ou retire bagay sa yo tankou ls,

432
00:20:07,380 --> 00:20:10,280
ak CD, ak tout moun sa yo.

433
00:20:10,280 --> 00:20:15,467
>> ODYANS: Ki sa ki nan diferans ki genyen
ant RM, RF, ak RM *

434
00:20:15,467 --> 00:20:16,300
ROB BOWDEN: Se konsa, RM * -

435
00:20:16,300 --> 00:20:17,700

436
00:20:17,700 --> 00:20:22,300
>> ALLISON: Kesyon te sa ki nan la
diferans ki genyen ant RM, RF, ak RM *.

437
00:20:22,300 --> 00:20:23,750

438
00:20:23,750 --> 00:20:25,950
>> ROB BOWDEN: Se konsa, RM *.

439
00:20:25,950 --> 00:20:31,910
Star an jeneral vle di tout nan
sa ki nan anyè sa a.

440
00:20:31,910 --> 00:20:33,540

441
00:20:33,540 --> 00:20:35,540
Ap eseye panse a lòt
fason pou montre zetwal.

442
00:20:35,540 --> 00:20:38,280

443
00:20:38,280 --> 00:20:44,780
Oke, zetwal aktyèlman jeneralman
vle di matche ak nenpòt modèl.

444
00:20:44,780 --> 00:20:54,930
Se konsa, si mwen gen yon dosye rele dog1,
manyen dog2, manyen cat1, manyen cat2.

445
00:20:54,930 --> 00:20:56,050

446
00:20:56,050 --> 00:21:02,110
Se konsa, ls * 1 ki pral enprime cat1 ak
dog1, paske ka ki dwe ranpli zetwal

447
00:21:02,110 --> 00:21:06,270
nan with-- youn a bezwen yo dwe la,
men zetwal sa yo kapab swa chat oswa chen.

448
00:21:06,270 --> 00:21:07,247
Li se yon kat nan bwa.

449
00:21:07,247 --> 00:21:08,580
Sa a pawòl Bondye a M 'ap chache.

450
00:21:08,580 --> 00:21:09,120
Sovaj kat.

451
00:21:09,120 --> 00:21:10,180

452
00:21:10,180 --> 00:21:13,960
Oswa mwen te kapab LS chen *, ak
Mwen te rive nan wè dog1, dog2.

453
00:21:13,960 --> 00:21:16,870
Se konsa, moun yo lis dosye yo
ki koresponn ak ki modèl an patikilye.

454
00:21:16,870 --> 00:21:18,150
Ou kapab sèvi ak ls nan fason sa.

455
00:21:18,150 --> 00:21:19,350

456
00:21:19,350 --> 00:21:22,020
>> Ls * zetwal alimèt anyen.

457
00:21:22,020 --> 00:21:25,710
Se konsa, li pral enprime tout nan
sa ki nan anyè sa a

458
00:21:25,710 --> 00:21:27,290
depi tout nan yo matche.

459
00:21:27,290 --> 00:21:30,130
Li pa nan ale nan enprime anyen
nan repèrtwar nivo anwo kay la.

460
00:21:30,130 --> 00:21:38,680
Si mwen gen yon anyè sub, foo, ak
manyen 1 2 3-- se konsa kounye a si zetwal RM *,

461
00:21:38,680 --> 00:21:41,450
retire cat1, cat2, dog1, dog2.

462
00:21:41,450 --> 00:21:42,340
Pa kapab retire foo.

463
00:21:42,340 --> 00:21:43,090
Li se yon anyè.

464
00:21:43,090 --> 00:21:43,920

465
00:21:43,920 --> 00:21:50,340
>> Se konsa, zetwal ogmante nan tout
dosye nan anyè a.

466
00:21:50,340 --> 00:21:55,210
Se konsa, teknikman RM * se tankou li di
RM cat1, cat2, dog1, dog2, foo.

467
00:21:55,210 --> 00:22:03,630
Lè nou konsidere ke RM -rf, teknikman zetwal ta
akonpli sa nou vle, men RM -rf--

468
00:22:03,630 --> 00:22:06,090
si mwen ale soti nan sa a
anyè, RM temp -rf,

469
00:22:06,090 --> 00:22:08,890
ki nan ale nan ale nan temp ak
recursive retire tout bagay.

470
00:22:08,890 --> 00:22:11,260

471
00:22:11,260 --> 00:22:21,060
>> Se konsa, zetwal se separe nan ki ki
se konprann by-- konsa bagay sa a

472
00:22:21,060 --> 00:22:25,090
ke mwen kouri nan, bagay sa a
ki se sa ki pouse m 'pou kòmandman

473
00:22:25,090 --> 00:22:28,770
ak Lè sa a egzekite ak ap fè
yo, mwen rele sa a koki mwen.

474
00:22:28,770 --> 00:22:31,930
Se konsa, sa a se koki tèt li yon pwogram.

475
00:22:31,930 --> 00:22:35,010
Men, si mwen te vle, mwen
te kapab kouri nan / bin / frape.

476
00:22:35,010 --> 00:22:36,930
Se koki a te rele frape.

477
00:22:36,930 --> 00:22:39,340
Epi, koulye a nou remake yon bagay
te yon ti kras chanje,

478
00:22:39,340 --> 00:22:42,200
e ke sa a paske anviwònman mwen an pou
koki a se yon ti jan diferan.

479
00:22:42,200 --> 00:22:45,415
>> Men koulye a, mwen teknikman kouri
yon kokiy ki nan koki mwen orijinal,

480
00:22:45,415 --> 00:22:49,570
e mwen ka sòti ki koki, e kounye a,
Mwen se back to top koki nivo mwen.

481
00:22:49,570 --> 00:22:55,240
Rezon ki fè li di
ki is-- etwal la.

482
00:22:55,240 --> 00:22:59,020
Se konsa, zetwal la se yon bagay
konprann pa frape.

483
00:22:59,020 --> 00:23:04,260
Se konsa, RM -rf, -rf drapo se
konprann pa jis RM.

484
00:23:04,260 --> 00:23:06,380
Li konnen ke lè ou
pase yon -rf ke ou

485
00:23:06,380 --> 00:23:09,520
vle li nan recursive retire
tout dosye san yo pa enspirasyon.

486
00:23:09,520 --> 00:23:13,960
Etwal la se yon bagay konprann
pa frape ke lè ou di RM *,

487
00:23:13,960 --> 00:23:16,890
frape pa pral di
hey RM *, retire zetwal.

488
00:23:16,890 --> 00:23:21,010
Bach ki pral di RM *
retire cat1, cat2, dog1, dog2.

489
00:23:21,010 --> 00:23:24,305
Li nan otomatikman ale nan elaji
tout dosye yo nan anyè a.

490
00:23:24,305 --> 00:23:29,100

491
00:23:29,100 --> 00:23:33,140
>> Epi Menm jan an tou se yon lòt tild
senbòl ki frape konprann.

492
00:23:33,140 --> 00:23:37,130
Lè ou di CD ~, frape ogmante
ki nan anyè lakay ou.

493
00:23:37,130 --> 00:23:38,910

494
00:23:38,910 --> 00:23:40,210
Lòt kesyon byen lwen tèlman?

495
00:23:40,210 --> 00:23:42,760

496
00:23:42,760 --> 00:23:46,060
OK konsa nou ap ale nan kòmanse ale rapid.

497
00:23:46,060 --> 00:23:47,700

498
00:23:47,700 --> 00:23:48,545
>> Contenu fini.

499
00:23:48,545 --> 00:23:49,670
Jis voye jete byen yo deyò.

500
00:23:49,670 --> 00:23:51,530
Yon anpil moun pa fè sa
reyalize sa a egziste.

501
00:23:51,530 --> 00:23:55,060
Se konsa, si mwen tape cd Dow, mwen
ta vle ale nan downloads.

502
00:23:55,060 --> 00:23:56,700
Mwen pa bezwen tape nloads.

503
00:23:56,700 --> 00:23:57,960

504
00:23:57,960 --> 00:24:00,770
Mwen ka jis frape Tab.

505
00:24:00,770 --> 00:24:03,794
Se konsa, li rekonèt ke
Dow a se yon prefiks ki

506
00:24:03,794 --> 00:24:05,710
pa matche ak anyen
lòt moun nan anyè sa a,

507
00:24:05,710 --> 00:24:07,520
se konsa li pral konplete ki pou ou.

508
00:24:07,520 --> 00:24:08,610
Koulye a, mwen ka antre nan.

509
00:24:08,610 --> 00:24:10,110
>> Mwen menm mwen te fè sa recursive.

510
00:24:10,110 --> 00:24:11,205
Se konsa, mkdir foo.

511
00:24:11,205 --> 00:24:12,480

512
00:24:12,480 --> 00:24:13,300
Ann al nan foo.

513
00:24:13,300 --> 00:24:14,830
mkdir ba.

514
00:24:14,830 --> 00:24:17,345
Se konsa, pral tounen nan kay mwen an
anyè, mwen ka wè downloads.

515
00:24:17,345 --> 00:24:19,040

516
00:24:19,040 --> 00:24:21,860
Koulye a, frape tab ankò,
otomatikman ale nan ranpli nan foo.

517
00:24:21,860 --> 00:24:22,880
Li nan anyè a sèlman.

518
00:24:22,880 --> 00:24:25,340
Frape tab ankò, otomatikman
ale nan ranpli nan ba.

519
00:24:25,340 --> 00:24:26,798
Se konsa, koulye a, mwen se nan (~ Downloads / foo / bar).

520
00:24:26,798 --> 00:24:27,310

521
00:24:27,310 --> 00:24:31,692
>> Se konsa, sa fini tab,
chak fwa mwen te rive nan lè biwo louvri,

522
00:24:31,692 --> 00:24:33,400
ak mwen kanpe sou
zepòl yon moun,

523
00:24:33,400 --> 00:24:40,470
epi yo ap ale RM
D-O-W-N-L-O-A-D-S, mwen mouri.

524
00:24:40,470 --> 00:24:41,990
Jis tab, tab, tab, tab.

525
00:24:41,990 --> 00:24:44,550

526
00:24:44,550 --> 00:24:45,630
Se konsa, definitivman itilize tab.

527
00:24:45,630 --> 00:24:47,890

528
00:24:47,890 --> 00:24:49,840
Epi Menm jan an tou leve, li
desann, yon anpil moun ki

529
00:24:49,840 --> 00:24:51,930
jis sa ki te rive
pa janm te frape leve, li desann.

530
00:24:51,930 --> 00:24:54,870
Li pral ale nan anvan an
kòmandman, se konsa si ou jis kouri yon bagay,

531
00:24:54,870 --> 00:24:58,300
epi ou vle kouri l 'ankò,
jis kenbe moute jouk ou jwenn nan li.

532
00:24:58,300 --> 00:24:59,870

533
00:24:59,870 --> 00:25:00,370
OK.

534
00:25:00,370 --> 00:25:01,460

535
00:25:01,460 --> 00:25:03,585
>> Se konsa, rapid, gen kèk lòt bagay.

536
00:25:03,585 --> 00:25:04,800

537
00:25:04,800 --> 00:25:05,930
Ann al tounen nan temp.

538
00:25:05,930 --> 00:25:06,976

539
00:25:06,976 --> 00:25:08,125
Se pou yo kreye kèk dosye.

540
00:25:08,125 --> 00:25:10,480

541
00:25:10,480 --> 00:25:15,215
Se konsa, nan isit la, mwen se jis
ale nan lis kèk mo yo.

542
00:25:15,215 --> 00:25:18,460

543
00:25:18,460 --> 00:25:21,035
chen, chat, Meow.

544
00:25:21,035 --> 00:25:23,940

545
00:25:23,940 --> 00:25:26,040
Se pou yo fè chen, pwason.

546
00:25:26,040 --> 00:25:27,500

547
00:25:27,500 --> 00:25:32,320
Se konsa, kounye rep se yon trè
kòmandman itil ke ou

548
00:25:32,320 --> 00:25:37,820
itilize fè rechèch nan tout
dosye pou yon tèks patikilye,

549
00:25:37,820 --> 00:25:40,910
ak teknikman ou kapab fè reyèlman
ekspresyon konplèks pou li matche ak.

550
00:25:40,910 --> 00:25:44,830
>> Se konsa, isit la, si mwen grèp, e ki sa
Mwen vle pou fè rechèch pou?

551
00:25:44,830 --> 00:25:49,130
Se pou nou di mwen pou chèche chat, ak
Mwen vle fè rechèch tout nan dosye sa yo.

552
00:25:49,130 --> 00:25:50,650
Se konsa, kouman mwen fè tout nan dosye sa yo?

553
00:25:50,650 --> 00:25:51,900
Star.

554
00:25:51,900 --> 00:25:54,939
Se konsa, nan dosye yon sèl, mwen gen chat.

555
00:25:54,939 --> 00:25:56,980
Mwen pwobableman te kapab gen
rele li yon bagay pi byen,

556
00:25:56,980 --> 00:25:59,063
paske ki sanble ak
nimewo liy oswa yon bagay.

557
00:25:59,063 --> 00:26:01,590
Men, nan dosye yon sèl mwen gen yon liy ak chat.

558
00:26:01,590 --> 00:26:04,160
Nan dosye de mwen gen yon liy ak chat.

559
00:26:04,160 --> 00:26:07,280
Se konsa, koulye a, mwen ka gade andedan dosye yon sèl ak
wè oh yeah, ki dosye te gen chat.

560
00:26:07,280 --> 00:26:10,210
Avi dosye twa pa te matche
paske chat se pa nan la.

561
00:26:10,210 --> 00:26:13,882
Mwen ka grèp pou Meow.

562
00:26:13,882 --> 00:26:14,840
Se sèlman ranpli de gen Meow.

563
00:26:14,840 --> 00:26:16,120

564
00:26:16,120 --> 00:26:20,640
>> Se konsa, sa ou ka konbine,
ankò, ak -r, ki

565
00:26:20,640 --> 00:26:23,580
jan mwen te di anvan
souvan vle di repetitif.

566
00:26:23,580 --> 00:26:29,800
Se konsa, mwen ka vini isit la, grèp -r
pou nenpòt ki egzanp of-- kite nan edite

567
00:26:29,800 --> 00:26:32,010
yon sèl sa a jis voye jete yon chat nan la.

568
00:26:32,010 --> 00:26:38,800
Se konsa, grèp -r pou nenpòt ki egzanp nan
chat nan tout anyè sa a.

569
00:26:38,800 --> 00:26:41,600
Epi li pral recursive
rechèch nenpòt ki subdirectories.

570
00:26:41,600 --> 00:26:43,940
Se konsa, nan Baz, gen nan chat.

571
00:26:43,940 --> 00:26:45,570
Nan temp / 2, gen nan chat.

572
00:26:45,570 --> 00:26:47,960
Ak nan temp / 1 gen nan chat.

573
00:26:47,960 --> 00:26:50,045
Se konsa, sa a, se chache ki nan dosye.

574
00:26:50,045 --> 00:26:51,250

575
00:26:51,250 --> 00:26:55,090
>> Koulye a, ou ka tou itilize yon jwenn.

576
00:26:55,090 --> 00:26:59,640
Se konsa, jwenn se espesifikman sou
kap chèche dosye ak yon non bay yo.

577
00:26:59,640 --> 00:27:02,490
Se konsa, kite a fè kèk plis.

578
00:27:02,490 --> 00:27:03,660
Ann al nan downloads.

579
00:27:03,660 --> 00:27:04,680

580
00:27:04,680 --> 00:27:05,380
Manyen dog1.

581
00:27:05,380 --> 00:27:06,840

582
00:27:06,840 --> 00:27:07,770
Manyen cat2.

583
00:27:07,770 --> 00:27:09,290

584
00:27:09,290 --> 00:27:10,760
Manyen cat_dog.

585
00:27:10,760 --> 00:27:14,550

586
00:27:14,550 --> 00:27:15,975
Manyen catcat.

587
00:27:15,975 --> 00:27:18,270

588
00:27:18,270 --> 00:27:23,810
>> Se konsa, mwen vle jwenn tout
dosye ak chen nan non an.

589
00:27:23,810 --> 00:27:28,060
Se konsa, jwenn, ak pou pi long la
tan mwen pa janm chonje

590
00:27:28,060 --> 00:27:33,760
ki jan jwenn te travay, jouk tan mwen finalman
li yon bagay ki te fè li se konsa klè.

591
00:27:33,760 --> 00:27:35,784
Se konsa, jwenn, otomatikman repetitif.

592
00:27:35,784 --> 00:27:36,950
Ou pa bezwen pase yon -r.

593
00:27:36,950 --> 00:27:38,090

594
00:27:38,090 --> 00:27:39,110
Se konsa, jwenn dot.

595
00:27:39,110 --> 00:27:40,750
Nou pa t 'te pale osijè de dot ankò.

596
00:27:40,750 --> 00:27:44,800
Lè nou konsidere ke dot dot toujou
vle di yon sèl anyè yo.

597
00:27:44,800 --> 00:27:46,960
Dot toujou vle di anyè aktyèl la.

598
00:27:46,960 --> 00:27:51,390
Se konsa, mwen te kapab RM -r dot nan la
menm jan mwen kapab RM -rf *.

599
00:27:51,390 --> 00:27:53,140
Alafen yo
akonpli menm bagay la.

600
00:27:53,140 --> 00:27:56,040
RM -rf dot ki pral retire
tout anyè aktyèl la.

601
00:27:56,040 --> 00:27:57,440

602
00:27:57,440 --> 00:27:59,680
>> OK, ki mwen pa vle fè a.

603
00:27:59,680 --> 00:28:01,490

604
00:28:01,490 --> 00:28:04,320
Men, jwenn dot.

605
00:28:04,320 --> 00:28:07,920
Se konsa, recursive rechèch aktyèl la
anyè, e kounye a, tout bagay

606
00:28:07,920 --> 00:28:14,125
apre sa a yo se yon pakèt moun sou drapo ke ou
itilize yo eskli bagay ki soti nan retounen nan.

607
00:28:14,125 --> 00:28:17,250
Se konsa, jwenn dot retounen tout bagay ke li
ka jwenn nan anyè aktyèl la.

608
00:28:17,250 --> 00:28:19,700
Moun sa yo se tout dosye yo
recursive chèche.

609
00:28:19,700 --> 00:28:21,250
Nou pral wè kèk nan moun ki nan yon dezyèm fwa.

610
00:28:21,250 --> 00:28:23,150

611
00:28:23,150 --> 00:28:27,140
>> Men, nan ka w ap mande ki jan mwen fè
ki, se konsa Kòmandman K, omwen nan anpil

612
00:28:27,140 --> 00:28:29,660
nan tèminal m 'ki nan Mac a efase li.

613
00:28:29,660 --> 00:28:34,660
Kontwòl L jeneralman efase
li pou nenpòt ki sòt de tèminal.

614
00:28:34,660 --> 00:28:36,480
Ou kapab tou tape klè.

615
00:28:36,480 --> 00:28:38,410
Men, si ou janm jwenn
nan yon scenario-- etranj

616
00:28:38,410 --> 00:28:42,790
li nan rive m 'yon koup time--
ki kote koulè yo nan envit ou

617
00:28:42,790 --> 00:28:46,590
yo tout messed moute, oswa ou
yo pa kapab wè anyen

618
00:28:46,590 --> 00:28:51,232
ke yo te tape lè w ap tape, paske
pafwa tankou se koulè background mete

619
00:28:51,232 --> 00:28:53,940
menm bagay la tou kòm koulè a ​​premye plan
e kounye a, ou pa ka wè polis yo.

620
00:28:53,940 --> 00:28:55,110

621
00:28:55,110 --> 00:28:59,830
Reyajiste se yon bagay ki jis retabli
ou default background nan nwa,

622
00:28:59,830 --> 00:29:01,840
devan blan, oswa kèlkeswa sa
ou mete yo nan.

623
00:29:01,840 --> 00:29:03,390

624
00:29:03,390 --> 00:29:04,790
>> Se konsa, kote nou te?

625
00:29:04,790 --> 00:29:05,930
Jwenn dot.

626
00:29:05,930 --> 00:29:09,360
Se konsa, kounye a tout bagay sot pase sa a
pwen mete restriksyon sou rezilta yo

627
00:29:09,360 --> 00:29:11,450
nan yon bagay ki matche ak chwa
modèl la bay yo.

628
00:29:11,450 --> 00:29:16,110
Se konsa, isit la mwen vle fè rechèch
tout bagay ak chat la non.

629
00:29:16,110 --> 00:29:17,300
Mwen te resevwa pa gen anyen.

630
00:29:17,300 --> 00:29:18,390
Poukisa se ke ka a?

631
00:29:18,390 --> 00:29:21,230
Oke, mwen jis pou chèche
yon bagay ki gen egzakteman chat la non.

632
00:29:21,230 --> 00:29:25,150
Si m 'vle rechèch yon bagay
ki gen kèk modèl, ak cat--

633
00:29:25,150 --> 00:29:28,890
quotes yo teknikman yo se pa nesesè,
men mwen m 'voye yo nan la.

634
00:29:28,890 --> 00:29:32,720
Se konsa, kounye a li jwenn catcat paske
sa a, se bagay la sèlman ki

635
00:29:32,720 --> 00:29:36,040
gen kèk abitrè
modèl ki te swiv pa chat.

636
00:29:36,040 --> 00:29:41,950
Mwen ka mete chat *, epi kounye a
jwenn catcat, cat_dog, cat2,

637
00:29:41,950 --> 00:29:45,245
paske moun yo se tout bagay sa yo ak chat
nan kòmansman an ki te swiv pa anyen.

638
00:29:45,245 --> 00:29:46,120
Ou ka konbine sa a.

639
00:29:46,120 --> 00:29:50,480
Si ou vle pou fè rechèch pou tout dosye C
ke ou gen, ou ta ka fè * c.

640
00:29:50,480 --> 00:29:51,960
Nou te blah.c isit la.

641
00:29:51,960 --> 00:29:53,000

642
00:29:53,000 --> 00:29:55,020
Se konsa, sa a, se yon jwenn travay.

643
00:29:55,020 --> 00:29:55,770
Ou kapab fè rechèch.

644
00:29:55,770 --> 00:29:58,270
Li te gen yon pakèt antye nan drapo
pou restriksyon pi lwen.

645
00:29:58,270 --> 00:30:00,960
Ak youn sou yo, se pou yo di -D.

646
00:30:00,960 --> 00:30:02,110

647
00:30:02,110 --> 00:30:04,435
Se konsa, Obsoleted.

648
00:30:04,435 --> 00:30:05,425

649
00:30:05,425 --> 00:30:06,550
Oh, sa a, se pa sa m 'vle.

650
00:30:06,550 --> 00:30:07,730
Pa -D.

651
00:30:07,730 --> 00:30:08,860
Kalite d.

652
00:30:08,860 --> 00:30:13,820
Se konsa, jwenn dot - kalite d.

653
00:30:13,820 --> 00:30:17,760
Se konsa, sa ki jis te fè se mwen chèche
pou tout dosye nan anyè aktyèl la

654
00:30:17,760 --> 00:30:21,680
ak a-- d kanpe pou
anyè anyè kalite.

655
00:30:21,680 --> 00:30:24,430
Sa a retounen tout repèrtwar
nan anyè aktyèl la.

656
00:30:24,430 --> 00:30:27,670
Ak kalite F se tout regilye
dosye yo, tout repèrtwar ki pa.

657
00:30:27,670 --> 00:30:29,809
Se konsa, sa se sèlman yon
egzanp sou lòt fason ou

658
00:30:29,809 --> 00:30:32,350
ka mete restriksyon sou rechèch la lòt
pase jis non an nan dosye a.

659
00:30:32,350 --> 00:30:34,126

660
00:30:34,126 --> 00:30:35,570
>> Li te 30 minit.

661
00:30:35,570 --> 00:30:36,848
Toujou prale.

662
00:30:36,848 --> 00:30:38,132
>> ALLISON: Mwen pral briz nan.

663
00:30:38,132 --> 00:30:39,670
Li pral amann.

664
00:30:39,670 --> 00:30:41,460
>> ROB BOWDEN: Se konsa, kèk lòt bagay.

665
00:30:41,460 --> 00:30:45,700
Koulye a, Bang, esklamasyon make.

666
00:30:45,700 --> 00:30:50,530
Se konsa, ki jeneralman means--
byen, kite a wè yon egzanp.

667
00:30:50,530 --> 00:30:52,230
Se konsa,! F, ki sa ki ki pral fè?

668
00:30:52,230 --> 00:30:53,520

669
00:30:53,520 --> 00:30:57,810
Oke li sanble gen
repete jwenn dot -Type f.

670
00:30:57,810 --> 00:30:59,240
Ki sa ki sou! G?

671
00:30:59,240 --> 00:31:00,760
Sa jis grèp -r chat *.

672
00:31:00,760 --> 00:31:02,010

673
00:31:02,010 --> 00:31:05,720
Se konsa, Bang ou ka itilize yo repete
yon lòd dènyèman fè.

674
00:31:05,720 --> 00:31:13,280
Se konsa, si mwen tape! GRE, li pral re-kouri
kòmandman yo ki te kòmanse ak gre pi

675
00:31:13,280 --> 00:31:14,060
dènyèman.

676
00:31:14,060 --> 00:31:17,090
>> Epi ou ka wè tout bagay sa yo
kòmande ak istwa.

677
00:31:17,090 --> 00:31:17,880
Se konsa, istwa.

678
00:31:17,880 --> 00:31:19,630
Sa yo se tout la
kòmandman mwen te kouri jodi a.

679
00:31:19,630 --> 00:31:21,089

680
00:31:21,089 --> 00:31:23,130
Ak byen, li pa literalman
restriksyon nan jodi a,

681
00:31:23,130 --> 00:31:25,180
men mwen te sèlman itilize sa a
aparèy tankou jodi a.

682
00:31:25,180 --> 00:31:28,730
Li nan antye ou nan la
istwa nan koki frape ou,

683
00:31:28,730 --> 00:31:30,433
eksepte li koupe nan kèk pwen.

684
00:31:30,433 --> 00:31:33,474
ODYANS: Kisa k ap pase si ou fè
istwa [fèbl] lòd ak yon erè

685
00:31:33,474 --> 00:31:35,430
nan rezilta a ap toujou enprime the--

686
00:31:35,430 --> 00:31:44,110
>> ROB BOWDEN: Yeah, si gen yon
erè nan youn nan sa yo commands--

687
00:31:44,110 --> 00:31:48,090
kidonk kite a di, ki se yon
erè lòd pa jwenn.

688
00:31:48,090 --> 00:31:49,312

689
00:31:49,312 --> 00:31:50,520
Toujou parèt nan istwa a.

690
00:31:50,520 --> 00:31:52,620

691
00:31:52,620 --> 00:31:53,170
Tout dwa.

692
00:31:53,170 --> 00:31:54,750

693
00:31:54,750 --> 00:31:56,040
Lòt kesyon sou anyen?

694
00:31:56,040 --> 00:31:58,760

695
00:31:58,760 --> 00:32:00,300
Se konsa, sa a, se Bang.

696
00:32:00,300 --> 00:32:04,230
>> Koulye a, bay lòd reyèlman itil, nonm.

697
00:32:04,230 --> 00:32:07,750
Se konsa, ki ba ou a
manyèl pou yon lòd pou yo bay.

698
00:32:07,750 --> 00:32:11,640
Se konsa nou di nonm ls, se konsa
sa a se ki montre m 'ls.

699
00:32:11,640 --> 00:32:13,400
Li bay lis sa anyè.

700
00:32:13,400 --> 00:32:17,150
Lè sa a se kote mwen wè ke gen
yo se sa yo drapo divès kalite ki egziste.

701
00:32:17,150 --> 00:32:21,340
Se konsa, nou wè ke ls-l egziste
si nou te li ke. ls-l

702
00:32:21,340 --> 00:32:26,150
ki ban m 'sa a lis konplè nan la
Anyè ak moun ki posede dosye a,

703
00:32:26,150 --> 00:32:29,750
gwosè a nan dosye a, nan
timestamp la modifye.

704
00:32:29,750 --> 00:32:31,130

705
00:32:31,130 --> 00:32:34,980
Se konsa, ls -yon se yon lòt youn ki ou ta ka
aktyèlman sèvi ak yon ti jan souvan.

706
00:32:34,980 --> 00:32:38,130
-AL se drapo ki pi komen m 'sa a ls sot pase yo.

707
00:32:38,130 --> 00:32:42,520
>> Se konsa, -yon, remake gen nan yon anpil
plis dosye pase jis ls.

708
00:32:42,520 --> 00:32:44,170
ls -yon.

709
00:32:44,170 --> 00:32:46,170
Ki sa ki nan an komen ak tout dosye sa yo?

710
00:32:46,170 --> 00:32:47,790
Yo kòmanse avèk yon dot.

711
00:32:47,790 --> 00:32:54,710
Se konsa, sa a se yon konvansyon nan Linux ki
dosye ki kòmanse ak yon dot yo kache.

712
00:32:54,710 --> 00:32:58,330
Se konsa, li jis vle di ke
lè nou jis ls dwat,

713
00:32:58,330 --> 00:33:04,170
oswa nou ap chèche anyè sa a lè l sèvi avèk
ekivalan a Chèche, oswa Windows la

714
00:33:04,170 --> 00:33:07,250
Ekivalan Explorer, ke nou
pa vle wè dosye dot sa yo.

715
00:33:07,250 --> 00:33:09,680
Yo jis polye gade nan nan bagay sa yo.

716
00:33:09,680 --> 00:33:11,790
Se konsa, yo yo kache
sof si ou espesyalman

717
00:33:11,790 --> 00:33:14,250
mande yo ak yon bagay tankou -yon.

718
00:33:14,250 --> 00:33:18,920
Se konsa, mwen kapab CD an .local, epi mwen wè
ki se sa ki tèt li yon anyè ki gen

719
00:33:18,920 --> 00:33:22,220
yon anyè pataje, ak
aplikasyon pou, ak bla bla bla.

720
00:33:22,220 --> 00:33:24,520
Se konsa, dot, dosye yo jis ap kache.

721
00:33:24,520 --> 00:33:26,250

722
00:33:26,250 --> 00:33:29,355
>> OK, se konsa lòt moun enpòtan.

723
00:33:29,355 --> 00:33:30,490

724
00:33:30,490 --> 00:33:32,000
Mwen gen yon koup mwen ka sote.

725
00:33:32,000 --> 00:33:38,160
Se pou nou jis reyèl pale rapid sou
dosye Jefò bagay sa yo.

726
00:33:38,160 --> 00:33:43,020
Se konsa, gen nan yon antye seri konplèks
de bagay sa yo ou kapab fè avèk sa yo,

727
00:33:43,020 --> 00:33:47,204
men jis yo wè yo, se pou yo di, eko.

728
00:33:47,204 --> 00:33:47,870
Yon lòt lòd.

729
00:33:47,870 --> 00:33:48,920
Vrèman bèbè lòd.

730
00:33:48,920 --> 00:33:50,710
Tout li fè se ekri ak lèt ​​detache sa m 'di l' bay.

731
00:33:50,710 --> 00:33:52,070
Se konsa, eko hello.

732
00:33:52,070 --> 00:33:53,850
Li jis répéta alo nan ekran an.

733
00:33:53,850 --> 00:33:55,170

734
00:33:55,170 --> 00:33:56,390
Alo nan lemonn.

735
00:33:56,390 --> 00:33:57,890
Eko alo nan lemonn.

736
00:33:57,890 --> 00:34:02,650
>> Se konsa, yon sèl lòd oswa yon sèl
senbòl ki frape konprann

737
00:34:02,650 --> 00:34:07,620
se sa a pi gran pase senbòl, ak
ki se pwodiksyon an nan yon senbòl dosye.

738
00:34:07,620 --> 00:34:10,940
Se konsa, si mwen pwodiksyon sa a yo
foo, gen nan kounye a yon dosye

739
00:34:10,940 --> 00:34:15,100
rele foo, andedan nan
ki se alo nan lemonn.

740
00:34:15,100 --> 00:34:18,489
Se konsa, remake ke lè m ap repete
alo tiyo mond nan foo,

741
00:34:18,489 --> 00:34:19,980
li pa t 'repete alo nan lemonn.

742
00:34:19,980 --> 00:34:22,630
Olye de sa li te mete nan dosye foo.

743
00:34:22,630 --> 00:34:25,340
Ak yon lòt lòd jis
voye jete li nan ou, chat.

744
00:34:25,340 --> 00:34:29,191
Sa a yon fason fasil jis konplètman
lis sa ki nan dosye a

745
00:34:29,191 --> 00:34:31,440
pou m 'pa gen yo louvri
yon editè tèks yo wè li.

746
00:34:31,440 --> 00:34:34,159
Se konsa, sa ki nan la
dosye foo se mond hello.

747
00:34:34,159 --> 00:34:38,460
Apre sa, mwen te kapab blah.c chat,
sa ki yo se sa a.

748
00:34:38,460 --> 00:34:42,123
>> Yon fwa ankò, sa yo, se kòmandman sa a, pa fè sa
espere ou gen yo tout memorize.

749
00:34:42,123 --> 00:34:43,860
Lide a se ou te wè yo.

750
00:34:43,860 --> 00:34:45,735
Petèt w ap travay sou
yon bagay, epi w ap

751
00:34:45,735 --> 00:34:47,230
tankou mwen malad nan ouvèti sa a dosye.

752
00:34:47,230 --> 00:34:50,120
Mwen swete mwen te kapab jis gade
nan sa ki reyèl rapid.

753
00:34:50,120 --> 00:34:52,320
Ou te kapab fè sa, Lè sa a,
tounen gade dèyè ak di oh mwen

754
00:34:52,320 --> 00:34:55,250
sonje yon bagay tankou
ki egziste, epi li chat.

755
00:34:55,250 --> 00:35:00,630
>> Se konsa, ki se ale nan yon dosye.

756
00:35:00,630 --> 00:35:06,639
Koulye a, gen se pa reyèlman nenpòt ki bon
egzanp sou lekti ki sòti nan yon dosye ankò.

757
00:35:06,639 --> 00:35:08,930
Ki sa ki nan yon bagay ki pran
yon bagay nan men estanda nan?

758
00:35:08,930 --> 00:35:10,010

759
00:35:10,010 --> 00:35:11,544
Nenpòt ki senp Linux lòd?

760
00:35:11,544 --> 00:35:13,480

761
00:35:13,480 --> 00:35:16,970
Lè nou jwenn nan li, nan yon koup
semèn yo tout piece-- byen,

762
00:35:16,970 --> 00:35:20,470
semèn sa a ou gen yon moso ki kote ou
kòmanse pran enfòmasyon nan men gwoup itilizatè a.

763
00:35:20,470 --> 00:35:23,696
Se konsa, anjeneral ou tape
ki D 'nan klavye la.

764
00:35:23,696 --> 00:35:25,570
Olye pou yo sezisman ki
D 'nan klavye a,

765
00:35:25,570 --> 00:35:30,950
ou kapab olye pou tiyo nan soti nan yon dosye
se konsa ke lè ou fè Mario, ./mario,

766
00:35:30,950 --> 00:35:35,200
tiyo nan soti nan nenpòt ki dosye yo bay yo, ak
ki nan ale nan kouri pwogram nan mario.

767
00:35:35,200 --> 00:35:37,300
Pa tann opinyon nan
klavye a, olye pou li a

768
00:35:37,300 --> 00:35:39,650
jis ale nan li a
liy nan dosye a foo.

769
00:35:39,650 --> 00:35:45,230
>> Se konsa, ki pi konsekan pase foo mete l 'nan
dosye a foo, ak mwens pase foo

770
00:35:45,230 --> 00:35:50,170
pran bagay nan dosye a foo ak
sèvi ak sa kòm opinyon nan pwogram sa a.

771
00:35:50,170 --> 00:35:51,520

772
00:35:51,520 --> 00:36:00,630
Epi jis yo wè li, nou ta ka tou eko
foo bar Baz, ak Lè sa olye pou yo yon sèl

773
00:36:00,630 --> 00:36:03,850
pi gran pase, se pou yo fè de an foo.

774
00:36:03,850 --> 00:36:05,610
Ki sa sa fè?

775
00:36:05,610 --> 00:36:07,180
Li jis jwen nan dosye a.

776
00:36:07,180 --> 00:36:15,360
Se konsa, olye remake si mwen repete bla nan
foo ak Lè sa a chat foo, li nan jis bla.

777
00:36:15,360 --> 00:36:18,285
Se konsa, lè ou pwodiksyon nan yon dosye li,
konplètman ranplas ki dosye.

778
00:36:18,285 --> 00:36:19,330

779
00:36:19,330 --> 00:36:22,740
Si ou jis vle nan kole,
doub [? elèv klas. ?]

780
00:36:22,740 --> 00:36:24,080
>> Epi pase a se tiyo.

781
00:36:24,080 --> 00:36:29,590
Tiyo Gets pi plis konplike, kote
li pran pwodiksyon an nan yon sèl lòd

782
00:36:29,590 --> 00:36:32,320
ak manje l 'nan lòd kap vini an.

783
00:36:32,320 --> 00:36:36,140
Se konsa, kèk bagay ki komen yo, istwa.

784
00:36:36,140 --> 00:36:37,920
Se konsa, pwa, mwen pa vle fè yon gade nan sa a.

785
00:36:37,920 --> 00:36:40,680

786
00:36:40,680 --> 00:36:44,485
Moutre m 'tout kòmandman nan istwa m'
kote mwen grèp-ed pou yon bagay.

787
00:36:44,485 --> 00:36:45,360
Non, sa a, se konfizyon.

788
00:36:45,360 --> 00:36:50,360
Moutre m 'tout kòmandman kote mwen jwenn.

789
00:36:50,360 --> 00:36:52,360
Tout jwenn kòmandman mwen janm kouri.

790
00:36:52,360 --> 00:36:55,050
>> Se konsa, istwa.

791
00:36:55,050 --> 00:36:59,017
Koulye a, sorti istwa a
ekran lis sa a nan kòmandman,

792
00:36:59,017 --> 00:37:00,850
men mwen pa vle
pwodiksyon li nan ekran an.

793
00:37:00,850 --> 00:37:03,445
Olye de sa, mwen pral tiyo l 'nan grèp.

794
00:37:03,445 --> 00:37:04,790

795
00:37:04,790 --> 00:37:07,830
Se konsa, kite a grèp pou tout sikonstans nan jwenn.

796
00:37:07,830 --> 00:37:09,550

797
00:37:09,550 --> 00:37:17,000
Se konsa, kounye olye pou yo pran grèp
D 'a, olye pou of--

798
00:37:17,000 --> 00:37:24,360
grèp se kapab okipe kòm input-- nou ap
lè l sèvi avèk yon ti kras diferan grèp isit la.

799
00:37:24,360 --> 00:37:29,550
Se konsa, olye pou yo sezisman lis la nan
bagay sa yo nou te vle pou fè rechèch pou

800
00:37:29,550 --> 00:37:31,070
li di grèp ap pran kòm opinyon.

801
00:37:31,070 --> 00:37:34,810
Se konsa, si mwen jis grèp jwenn, li
tann pou mwen pou m tape bagay sa yo.

802
00:37:34,810 --> 00:37:37,661
Se konsa, chat alo jwenn.

803
00:37:37,661 --> 00:37:38,160
Bonjou.

804
00:37:38,160 --> 00:37:40,430

805
00:37:40,430 --> 00:37:40,930
Jwenn.

806
00:37:40,930 --> 00:37:43,670
Avi chak fwa mwen tape jwenn
li rekonèt ke mwen tape jwenn.

807
00:37:43,670 --> 00:37:44,880

808
00:37:44,880 --> 00:37:49,540
Se konsa, olye pou yo sa a, pral
dosye rechèch pou jwenn.

809
00:37:49,540 --> 00:37:53,930
>> Se konsa, istwa se kounye a ale nan
pwodiksyon yon lis tout kòmandman.

810
00:37:53,930 --> 00:37:55,200

811
00:37:55,200 --> 00:37:58,100
Nou ap mete ke pwodiksyon,
epi nou ap manje l 'bay grèp,

812
00:37:58,100 --> 00:38:00,180
ak se konsa li a voye krache deyò
tout sikonstans nan jwenn.

813
00:38:00,180 --> 00:38:02,170

814
00:38:02,170 --> 00:38:05,570
Rezon ki fè mwen te di li ta dwe konfizyon
se si I-- li la toujou konfizyon.

815
00:38:05,570 --> 00:38:07,030
Si m 'grèp pou grèp.

816
00:38:07,030 --> 00:38:08,755

817
00:38:08,755 --> 00:38:11,130
Avi li nan bèl anpil toujou
ki montre yo lòd, ki mwen jis

818
00:38:11,130 --> 00:38:15,280
kouri paske sa lòd
kont li genyen grèp andedan nan li.

819
00:38:15,280 --> 00:38:16,580

820
00:38:16,580 --> 00:38:20,674
>> OK, se konsa nenpòt kesyon sou anyen?

821
00:38:20,674 --> 00:38:22,340
Apre sa, m'a transfere li sou nan pwen sa.

822
00:38:22,340 --> 00:38:24,690
Èspere ke sa a se yon bèl
BECA de tout kòmandman

823
00:38:24,690 --> 00:38:30,100
ke ou pa bezwen gen
memorize, men sa yo fè moute

824
00:38:30,100 --> 00:38:32,950
yon solid 95% nan sa mwen
fè nan liy lan lòd.

825
00:38:32,950 --> 00:38:34,310

826
00:38:34,310 --> 00:38:39,140
Epitou kenbe nan tèt ou ke liy lan bay lòd
tèt li, frape se yon lang programmation,

827
00:38:39,140 --> 00:38:43,070
ak se konsa lè ou jwenn desann nan li, ou
ta ka vle fè bagay sa yo reyèlman konplèks.

828
00:38:43,070 --> 00:38:47,522
Se konsa, li gen bagay sa yo tankou
pasan, ak ifs, ak tout moun sa yo

829
00:38:47,522 --> 00:38:50,230
ki w ap ale nan jwenn itilize
ak lang programmation ou yo.

830
00:38:50,230 --> 00:38:53,660
Men, ki ale pi lwen nan
sijè ki abòde nan seksyon sa a.

831
00:38:53,660 --> 00:38:55,520

832
00:38:55,520 --> 00:38:56,985
OK, se konsa pa gen okenn kesyon?

833
00:38:56,985 --> 00:38:57,940

834
00:38:57,940 --> 00:38:58,523
ALLISON: Okenn?

835
00:38:58,523 --> 00:38:59,450
GABRIEL: Eske ou pral to--

836
00:38:59,450 --> 00:39:01,158
ALLISON: Mwen ka fè l '
sou mwen si ou vle.

837
00:39:01,158 --> 00:39:02,626
Nou ka wè sa ki rive.

838
00:39:02,626 --> 00:39:03,750
ROB BOWDEN: Off Allison.

839
00:39:03,750 --> 00:39:05,090
ALLISON: Woo.

840
00:39:05,090 --> 00:39:07,504
Ou se yon zak difisil yo swiv, Rob.

841
00:39:07,504 --> 00:39:08,920
ou vle m 'chanje avèk ou?

842
00:39:08,920 --> 00:39:10,246
Oswa ou te resevwa, OK.

843
00:39:10,246 --> 00:39:13,590

844
00:39:13,590 --> 00:39:16,990
Mwen pral eseye ak pa
byen dwe kòm long la.

845
00:39:16,990 --> 00:39:20,619

846
00:39:20,619 --> 00:39:22,660
Ann wè si volonte sa a
travay fason an mwen vle li nan.

847
00:39:22,660 --> 00:39:26,170

848
00:39:26,170 --> 00:39:26,670
Petèt?

849
00:39:26,670 --> 00:39:27,760

850
00:39:27,760 --> 00:39:28,296
Haha!

851
00:39:28,296 --> 00:39:28,796
Wi.

852
00:39:28,796 --> 00:39:30,460

853
00:39:30,460 --> 00:39:34,066
>> Se konsa, mwen jis ale nan trè vit ale
a varyab, pasan, kondisyonal,

854
00:39:34,066 --> 00:39:35,440
ak yon ti jan ti kras sou du a.

855
00:39:35,440 --> 00:39:38,570
Si w gen kesyon an
nenpòt ki lè, tanpri sispann m '.

856
00:39:38,570 --> 00:39:42,750
Nèg sa yo ap raple m 'nan repete
kesyon ou a nan ka mwen bliye,

857
00:39:42,750 --> 00:39:44,210
men se pa ta dwe twò move.

858
00:39:44,210 --> 00:39:45,850
>> Se konsa, varyab, yeah.

859
00:39:45,850 --> 00:39:48,060
Nou pa gen okenn youn nan ou
Moso reyur isit la.

860
00:39:48,060 --> 00:39:50,440
Mwen si ke pi fò nan nou, si
ou te gen kèk sòt de jwèt

861
00:39:50,440 --> 00:39:53,810
ke ou kreye ak grafouyen, ou te gen
nan kenbe tras nan yon bagay tankou nòt,

862
00:39:53,810 --> 00:39:55,870
oswa tan, oswa yon bagay tankou sa.

863
00:39:55,870 --> 00:39:58,080
Se konsa, moun zoranj klere
moso ke nou wè gen

864
00:39:58,080 --> 00:40:02,630
yo se jis fòm lan grafouyen nan
varyab, epi ou pral definitivman

865
00:40:02,630 --> 00:40:04,640
gen lè l sèvi avèk varyab
nan tout pwogram ou an.

866
00:40:04,640 --> 00:40:07,350
Si ou pa ap, mwen pa reyèlman
asire ki sa w ap fè.

867
00:40:07,350 --> 00:40:09,000

868
00:40:09,000 --> 00:40:12,215
>> Men, de tout fason, gwo bagay,
defini varyab.

869
00:40:12,215 --> 00:40:13,630

870
00:40:13,630 --> 00:40:16,970
Avèk C chak varyab gen
gen yon kalite te deklare,

871
00:40:16,970 --> 00:40:22,090
Se konsa, mwen te ban nou yon trè
yon sèl jeneral nan tèt la.

872
00:40:22,090 --> 00:40:24,045
Se konsa, ou pral gen ou
tape ak Lè sa a tou sa

873
00:40:24,045 --> 00:40:25,420
ou deside rele varyab ou yo.

874
00:40:25,420 --> 00:40:27,500

875
00:40:27,500 --> 00:40:29,680
Se konsa, nan ka sa a, ki kalite
nan lis varyab ou yo.

876
00:40:29,680 --> 00:40:31,400
>> Nou gen twa egzanp.

877
00:40:31,400 --> 00:40:34,439
Char nan kèk klas,
nan yon A, ki se ki sa

878
00:40:34,439 --> 00:40:36,230
Mwen si ou tout vle
jwenn nan klas sa a.

879
00:40:36,230 --> 00:40:37,380

880
00:40:37,380 --> 00:40:40,670
Ou ka defini miltip
varyab sou yon sèl liy

881
00:40:40,670 --> 00:40:43,880
osi lontan ke yo ap tout kalite la menm,
ki se dezyèm egzanp nou an gen

882
00:40:43,880 --> 00:40:46,409
ki kote ou gen twa
varyab, x, y, ak z.

883
00:40:46,409 --> 00:40:47,200
Yo ap tout cha.

884
00:40:47,200 --> 00:40:49,160

885
00:40:49,160 --> 00:40:53,250
Lè sa a, ou ka tou, nan sa a dènye
egzanp ak nòt Int ak nimewo

886
00:40:53,250 --> 00:40:56,510
nan ekip, ou ka
inisyalize yo dwa gen.

887
00:40:56,510 --> 00:41:01,270
>> Se konsa, nan egzanp lan mitan kote nou
jis gen flote nan x, y, ak z,

888
00:41:01,270 --> 00:41:02,730
moun yo pa inisyalizèd ankò.

889
00:41:02,730 --> 00:41:04,140
Yo pa gen okenn valè.

890
00:41:04,140 --> 00:41:05,600
Oswa yo gen valè fatra.

891
00:41:05,600 --> 00:41:07,370

892
00:41:07,370 --> 00:41:10,790
Men, si ou eseye epi sèvi ak yo,
du a pral rele nan ou.

893
00:41:10,790 --> 00:41:14,727
Ou gen nan tou de deklare ak
inisyalize varyab ou.

894
00:41:14,727 --> 00:41:16,310
Se konsa, nan yon sèl sa a sot pase yo, n ap fè tou de.

895
00:41:16,310 --> 00:41:19,320
Nou ap deklare varyab
nan nòt ak kantite ekip,

896
00:41:19,320 --> 00:41:24,134
epi n ap inisyalizin yo, bay
yo valè inisyal yo nan 7 ak 4

897
00:41:24,134 --> 00:41:24,675
respektivman.

898
00:41:24,675 --> 00:41:26,310

899
00:41:26,310 --> 00:41:27,190
Fre.

900
00:41:27,190 --> 00:41:28,550
Tout moun sa ki bon?

901
00:41:28,550 --> 00:41:29,470
Awesome.

902
00:41:29,470 --> 00:41:31,690
>> OK, se konsa kèk konvansyon.

903
00:41:31,690 --> 00:41:35,965
Si ou nèg te li
a style 50, sa yo

904
00:41:35,965 --> 00:41:39,510
yo se jis bagay sa yo ke nou ta renmen pou
ou aplike nan style ou.

905
00:41:39,510 --> 00:41:41,230
Non Se konsa, ki gen sans.

906
00:41:41,230 --> 00:41:45,700
Si w kòmanse rele bagay sa yo
jis x, y, ak z, espesyalman

907
00:41:45,700 --> 00:41:47,902
jan ou jwenn nan long
pwogram, w ap

908
00:41:47,902 --> 00:41:49,610
pwobableman ale nan
konfonn tèt ou yo epi yo dwe

909
00:41:49,610 --> 00:41:52,930
tankou ki sa ki sa a varyab refere li a.

910
00:41:52,930 --> 00:41:55,880
Mwen pa gen okenn lide ki sa sa a vle di.

911
00:41:55,880 --> 00:41:59,280
>> Se konsa, si li nan te vle di yo kenbe
yon nòt, rele li nòt.

912
00:41:59,280 --> 00:42:05,720
Si li la vle di ke yo kenbe kèk repons
oswa lakòz, bay li yon non tankou sa.

913
00:42:05,720 --> 00:42:09,920
Pou pasan, ki nou pral
jwenn nan nan pwochen glise la,

914
00:42:09,920 --> 00:42:12,985
varyab lèt yon sèl yo se amann.

915
00:42:12,985 --> 00:42:16,033

916
00:42:16,033 --> 00:42:18,449
ROB BOWDEN: Mwen, j, ak k yo
jis konvansyon pou pou pasan

917
00:42:18,449 --> 00:42:22,050
ke tout moun espere yo
yo dwe rele mwen, j, ak k.

918
00:42:22,050 --> 00:42:26,890
Ou ka rele them-- mwen wè ranje
kolòn oswa rele ranje pafwa

919
00:42:26,890 --> 00:42:29,450
pou de pasan enbrike, ak
sa a, se tou kalite estanda.

920
00:42:29,450 --> 00:42:31,450
Men, mwen ak j se konplètman konprann.

921
00:42:31,450 --> 00:42:33,670
>> ALLISON: Yeah, mwen ak
j w ap totalman amann.

922
00:42:33,670 --> 00:42:36,250
Pou poutèt a klè tankou
nan kèk nan P kouche ou,

923
00:42:36,250 --> 00:42:39,745
li ta ka fè sans yo gen plis
bagay deskriptif nan la jis

924
00:42:39,745 --> 00:42:40,920
nan kenbe tras nan li.

925
00:42:40,920 --> 00:42:45,100
Men mwen panse ke mwen, j, ak k mwen panse ke
a vas majorite de nou tout sèvi ak yo.

926
00:42:45,100 --> 00:42:46,890

927
00:42:46,890 --> 00:42:50,340
>> ROB BOWDEN: Avèk sa yo
konvansyon, se konsa style se enpòtan.

928
00:42:50,340 --> 00:42:53,520
Li nan youn nan kat aks yo
ki te sou ou ap resevwa nòt,

929
00:42:53,520 --> 00:42:58,110
epi li se tèlman fasil yo jis ale sou
P ou yo mete nan fen a, epi fè sèten

930
00:42:58,110 --> 00:42:59,770
ke pa gen erè stylistic.

931
00:42:59,770 --> 00:43:01,742
Se konsa, asire w ke ou ap tabulation kòrèkteman.

932
00:43:01,742 --> 00:43:03,200
Asire w ke varyab ou yo rele.

933
00:43:03,200 --> 00:43:04,450
Kite kèk kòmantè.

934
00:43:04,450 --> 00:43:06,677
Li se trè fasil jwenn pwen sa yo.

935
00:43:06,677 --> 00:43:09,510
Ou pa bezwen panse osijè de
anyen yo nan lòd yo jwenn pwen sa yo.

936
00:43:09,510 --> 00:43:11,093
Ou pa gen figi anyen deyò.

937
00:43:11,093 --> 00:43:12,640
Li nan jis fè li gade bèl.

938
00:43:12,640 --> 00:43:14,850
>> ALLISON: An reyalite, nou
gen style 50, ki

939
00:43:14,850 --> 00:43:17,920
ap fè w konnen kote w ap pitye
moute si w ap pitye moute sou style

940
00:43:17,920 --> 00:43:21,180
epi yo pral di ou egzakteman sa ou
bezwen ranje ak ki jan ou bezwen fikse li.

941
00:43:21,180 --> 00:43:23,900
Li la tou jis bon mansyone
ke li nan politik kou

942
00:43:23,900 --> 00:43:27,200
ke si w ap nan biwo
èd tan ak kòd ou a se yon dezòd,

943
00:43:27,200 --> 00:43:30,200
nou ka refize ede
ou jiskaske li sanble joli.

944
00:43:30,200 --> 00:43:34,310
Se konsa, kòmanse soti dwat,
kenbe ki konsistan style,

945
00:43:34,310 --> 00:43:37,100
w ap tou jis ale nan fè
lavi ou anpil antye pi fasil lè

946
00:43:37,100 --> 00:43:38,730
w ap eseye ale nan dbug.

947
00:43:38,730 --> 00:43:41,510
Si w ap ap eseye figi konnen
kote ou ap manke yon atèl Curly

948
00:43:41,510 --> 00:43:44,890
epi yo ap sou tout plas la, w ap
jis fè pwòp vi ou pi rèd.

949
00:43:44,890 --> 00:43:47,217
Se konsa, dwe konsistan avèk style.

950
00:43:47,217 --> 00:43:48,800
Mwen te pwomèt li pral fè lavi ou pi fasil.

951
00:43:48,800 --> 00:43:50,330
Li pral fè lavi nou pi fasil.

952
00:43:50,330 --> 00:43:51,869
Tout moun yo pral pi pi kontan.

953
00:43:51,869 --> 00:43:52,910
Epi sa a, sa ou vle.

954
00:43:52,910 --> 00:43:54,192

955
00:43:54,192 --> 00:43:55,650
GABRIEL: klas ou yo pral pi wo.

956
00:43:55,650 --> 00:43:56,858
ALLISON: Wi, ak klas ou yo.

957
00:43:56,858 --> 00:43:58,410

958
00:43:58,410 --> 00:44:01,930
Si tf ou a tankou ou,
gen tandans ka favorab.

959
00:44:01,930 --> 00:44:02,940

960
00:44:02,940 --> 00:44:05,010
Tout dwa, ak Lè sa a jis
pwen nan dezyèm isit la.

961
00:44:05,010 --> 00:44:06,300
Inisyalizasyon ki konsistan.

962
00:44:06,300 --> 00:44:09,605
Se konsa, kòm nou te wè, ou ka deklare
ak inisyalize bagay sa yo.

963
00:44:09,605 --> 00:44:10,750

964
00:44:10,750 --> 00:44:13,180
Miltip varyab sou liy la menm.

965
00:44:13,180 --> 00:44:17,930
Youn nan bagay nou ta renmen ou pa
fè se deklare kèk varyab

966
00:44:17,930 --> 00:44:21,360
epi yo pa inisyalize yo sou menm bagay la tou
liy ke ou ap inisyalizin lòt moun.

967
00:44:21,360 --> 00:44:23,960
>> Se konsa, nan ka sa a te fè
okenn sans tou sa,

968
00:44:23,960 --> 00:44:29,050
nou gen egzanp lan isit la
kote nou ap deklare antye

969
00:44:29,050 --> 00:44:31,180
nan varyab nan trimès
dis kòb ak peni,

970
00:44:31,180 --> 00:44:34,214
men trimès ak peni
pa gen okenn valè inisyal.

971
00:44:34,214 --> 00:44:36,630
Nou pa t 'inisyalizèd yo,
men dwa nan mitan an gen

972
00:44:36,630 --> 00:44:38,600
nou deja inisyalizèd dis kòb nan 0.

973
00:44:38,600 --> 00:44:41,650
Se konsa, swa fè trimès, dis kòb, peni.

974
00:44:41,650 --> 00:44:43,170
Oubyen èske trimès egal 0.

975
00:44:43,170 --> 00:44:43,930
Dimes egal 0.

976
00:44:43,930 --> 00:44:46,810
Peni egal 0, oswa kèlkeswa sa
moun inisyal valè ye.

977
00:44:46,810 --> 00:44:49,800
>> Gwo bagay ak style, ou dwe konsistan.

978
00:44:49,800 --> 00:44:51,050
Lè w gen dout, ou dwe konsistan.

979
00:44:51,050 --> 00:44:52,129

980
00:44:52,129 --> 00:44:53,420
Men, swiv gid style nou an tou.

981
00:44:53,420 --> 00:44:54,710

982
00:44:54,710 --> 00:44:55,317
Fre.

983
00:44:55,317 --> 00:44:56,150
Tout moun bon a?

984
00:44:56,150 --> 00:44:57,566
>> ODYANS: Ki kote nan gid-la style?

985
00:44:57,566 --> 00:45:00,800
ALLISON: Gid sa a style
se on-- sa ki nan sit entènèt la?

986
00:45:00,800 --> 00:45:03,950
>> GABRIEL: Mwen panse ke li nan manual.cs50.net/--

987
00:45:03,950 --> 00:45:04,575
ALLISON: style?

988
00:45:04,575 --> 00:45:05,610

989
00:45:05,610 --> 00:45:06,390
>> GABRIEL: Style.

990
00:45:06,390 --> 00:45:06,920
Oui.

991
00:45:06,920 --> 00:45:07,520
>> ALLISON: Wi.

992
00:45:07,520 --> 00:45:10,150
Se konsa, kesyon, kote se style 50.

993
00:45:10,150 --> 00:45:12,250
manual.cs50.net/style.

994
00:45:12,250 --> 00:45:13,639
Wi?

995
00:45:13,639 --> 00:45:16,880
>> ODYANS: Si nou ap defini
varyab, se li OK

996
00:45:16,880 --> 00:45:28,145
si nou mete tankou [fèbl] tankou
nòt Int ak Lè sa a int objektif.

997
00:45:28,145 --> 00:45:29,873

998
00:45:29,873 --> 00:45:35,100
Se konsa, ou ta ka di ke kounye a nou te
te rive nan defini yo ansanm?

999
00:45:35,100 --> 00:45:37,640
>> ALLISON: Se konsa, kesyon, yo ta dwe
ou gen redondants Kòd

1000
00:45:37,640 --> 00:45:40,940
lè w ap defini
varyab tankou nòt int ak

1001
00:45:40,940 --> 00:45:43,239
sou pwochen liy jwèt la int?

1002
00:45:43,239 --> 00:45:46,030
ROB BOWDEN: Gen definitivman
ka kote redondants Kòd se move.

1003
00:45:46,030 --> 00:45:47,738
Mwen pa ta konsidere
ke kòd redondants.

1004
00:45:47,738 --> 00:45:50,970
Mwen prèske pa janm deklare miltip
varyab sou liy lan menm tout tan.

1005
00:45:50,970 --> 00:45:53,736
Men, si anyen, li nan paske
anjeneral mwen kite kèk sòt de kòmantè

1006
00:45:53,736 --> 00:45:55,235
esplike ou kisa ki varyab la se pou.

1007
00:45:55,235 --> 00:45:57,582
Se konsa, mwen pral di Int nòt koupe koupe.

1008
00:45:57,582 --> 00:45:59,350
Kenbe yon dosye sou kèlkeswa sa.

1009
00:45:59,350 --> 00:46:00,710
Nan total koupe koupe.

1010
00:46:00,710 --> 00:46:01,790

1011
00:46:01,790 --> 00:46:06,455
Se konsa, li la pi gwosye nan fason sa a
yo mete yo tout sou liy la menm.

1012
00:46:06,455 --> 00:46:08,080
Mwen jis pa janm mete yo sou liy lan menm.

1013
00:46:08,080 --> 00:46:10,580
>> ALLISON: Mwen santi mwen renmen li nan
preferans pèsonèl nan pwen sa.

1014
00:46:10,580 --> 00:46:14,900
>> ODYANS: ki ale pou
pou pasan ak lòt bagay tou?

1015
00:46:14,900 --> 00:46:15,900
ROB BOWDEN: Tankou andedan?

1016
00:46:15,900 --> 00:46:18,282
Tankou int mwen egal 0 vigil
longè egal yon bagay?

1017
00:46:18,282 --> 00:46:19,490
Ke ou pa gen yon chwa.

1018
00:46:19,490 --> 00:46:21,850

1019
00:46:21,850 --> 00:46:25,910
Avèk pou pasan inisyalizasyon a
part-- konsa ou ta ka yo te sèlman wè

1020
00:46:25,910 --> 00:46:31,520
int mwen egal 0 virgules mwen mwens
pase tou sa virgules mwen plis plis.

1021
00:46:31,520 --> 00:46:33,820
Ke mwen int egal 0,
teknikman ou ka tou

1022
00:46:33,820 --> 00:46:35,770
fè sa nou te wè anvan
ak sentaks la vigil.

1023
00:46:35,770 --> 00:46:39,790
int mwen egal 0 vigil j
egal 3 vigil k egal 5.

1024
00:46:39,790 --> 00:46:41,610

1025
00:46:41,610 --> 00:46:44,320
Ou pa gen yon chwa a fann
ki moute nan liy miltip,

1026
00:46:44,320 --> 00:46:46,530
e ke sa a estanda.

1027
00:46:46,530 --> 00:46:47,780
Wè li gen se amann.

1028
00:46:47,780 --> 00:46:49,182

1029
00:46:49,182 --> 00:46:49,890
ALLISON: Awesome.

1030
00:46:49,890 --> 00:46:52,120
Oke, bon seg nan pasan.

1031
00:46:52,120 --> 00:46:54,860

1032
00:46:54,860 --> 00:46:58,980
Se konsa, yeah, isit la nou gen kèk egzanp
nan pasan ke ou nèg te wè nan grafonyen moun.

1033
00:46:58,980 --> 00:47:01,550
Ak nan kou tout moun sa yo
ka jis dwe rkre nan C.

1034
00:47:01,550 --> 00:47:04,610
Apre sa, yo fondamantalman pèmèt ou
yo repete kèk seksyon nan Kòd

1035
00:47:04,610 --> 00:47:06,740
jiskaske yon kondisyon sèten
sa te rankontre, ki nou pral

1036
00:47:06,740 --> 00:47:09,198
jwenn nan dwa apre pale
sou pasan ak kondisyonal.

1037
00:47:09,198 --> 00:47:11,150

1038
00:47:11,150 --> 00:47:12,570
>> Se konsa, nou gen twa kalite prensipal la.

1039
00:47:12,570 --> 00:47:17,500
Pou, pandan y ap, epi fè pandan y ap, ki
nou tout ap ale nan kounye a.

1040
00:47:17,500 --> 00:47:18,860
Se konsa, premye a se yon sèl pou pasan.

1041
00:47:18,860 --> 00:47:20,490

1042
00:47:20,490 --> 00:47:25,034
Se konsa, pou kèk kondisyon,
egzekite sa a blòk nan kòd.

1043
00:47:25,034 --> 00:47:27,200
Nou gen ti kras fre sa a
dyagram isit la nan pati anba nan.

1044
00:47:27,200 --> 00:47:28,230

1045
00:47:28,230 --> 00:47:32,310
Men, fondamantalman ou gen nan
pou ou, ke premye liy,

1046
00:47:32,310 --> 00:47:34,240
w ap ale nan
inisyalize varyab ou.

1047
00:47:34,240 --> 00:47:38,260
>> Se konsa, kòm nou te pale de, mwen se
egal a 0 oswa mwen ki egal a 10.

1048
00:47:38,260 --> 00:47:40,010
Kèlkeswa sa ou bezwen ke
varyab yo dwe li nan

1049
00:47:40,010 --> 00:47:43,970
ale nan dwe inisyalizèd a,
deklare ak inisyalizèd nan kèk valè.

1050
00:47:43,970 --> 00:47:46,760
Se konsa, Lè sa a, nou gen kèk
kondisyon ki k ap pase

1051
00:47:46,760 --> 00:47:48,900
yo dwe tcheke nou an
varyab kont yon bagay.

1052
00:47:48,900 --> 00:47:55,220
Se konsa, nan ka a ka a tipik kote
petèt ou vle seksyon sa a nan Kòd

1053
00:47:55,220 --> 00:47:56,620
al touye senk fwa.

1054
00:47:56,620 --> 00:48:02,380
Se konsa, nou ta gen int mwen egal 0, epi nou
vle li nan dwe lè mwen se mwens pase 5.

1055
00:48:02,380 --> 00:48:04,940
Se konsa, ki kondisyon se jis
ale nan tcheke ke chak fwa.

1056
00:48:04,940 --> 00:48:07,120
Si ke kondisyon
evalye vre, li nan

1057
00:48:07,120 --> 00:48:11,162
ale nan kouri kòd la, ki se egzakteman
sa dyagram sa a ti kras se ki montre.

1058
00:48:11,162 --> 00:48:12,370

1059
00:48:12,370 --> 00:48:13,639
>> Se konsa, li ègzekutra li.

1060
00:48:13,639 --> 00:48:15,430
Li dènye nouvèl yon varyab,
ki se sa ki nou wè

1061
00:48:15,430 --> 00:48:21,020
nan pati nan sot pase yo nan pou nou an
bouk inisyalizasyon a.

1062
00:48:21,020 --> 00:48:22,370

1063
00:48:22,370 --> 00:48:26,030
Se konsa, li pral jis kontinye ap fè sa
jouk ke kondisyon se pa sa te rankontre,

1064
00:48:26,030 --> 00:48:28,010
ak Lè sa a li pral sòti
bouk la yo e yo kontinye

1065
00:48:28,010 --> 00:48:29,960
deplase sou ak rès la nan pwogram ou an.

1066
00:48:29,960 --> 00:48:31,320

1067
00:48:31,320 --> 00:48:33,620
Tout moun bon a?

1068
00:48:33,620 --> 00:48:34,440
Fre.

1069
00:48:34,440 --> 00:48:37,780
>> Se konsa, isit la nan yon egzanp, sanble anpil
nan yon bagay mwen jis te pale osijè de.

1070
00:48:37,780 --> 00:48:42,030
Se konsa, nou jis vle enprime
sa a se CS50 10 fwa.

1071
00:48:42,030 --> 00:48:44,540
Se konsa, ou wè isit la nou gen
pou nou an, epi lè sa a nou

1072
00:48:44,540 --> 00:48:47,450
inisyalize varyab la
mwen yo dwe egal a 0.

1073
00:48:47,450 --> 00:48:50,610
Kondisyon nou an ap tcheke
ke li nan mwens pase 10.

1074
00:48:50,610 --> 00:48:55,210
Se konsa, evalye vre lè nou premye
kòmanse, ak Lè sa a dènye nouvèl varyab nou an

1075
00:48:55,210 --> 00:48:58,985
chak fwa ke li aktyèlman ègzekutra
ak simagri soti sa se CS50.

1076
00:48:58,985 --> 00:49:00,510

1077
00:49:00,510 --> 00:49:02,180
Epi yo pral mete fen nan apre 10 fwa.

1078
00:49:02,180 --> 00:49:03,190

1079
00:49:03,190 --> 00:49:04,070
Fre.

1080
00:49:04,070 --> 00:49:07,130
>> Se konsa, pandan y ap pasan yo moute kap vini an.

1081
00:49:07,130 --> 00:49:12,400
Ak jan ou wè la a, nou jis gen
kèk kesyon sa a pandan y ap condition--?

1082
00:49:12,400 --> 00:49:15,238
>> ODYANS: Kouman mwen ka sote
aktyèlman jis pa gen yon sèl nimewo,

1083
00:49:15,238 --> 00:49:19,030
men de nonb [fèbl]
mwen plis plis plis?

1084
00:49:19,030 --> 00:49:23,390
>> ALLISON: Se konsa, kesyon an te ki jan ou ka
aktyalizasyon varyab ou a pi plis pase yon sèl

1085
00:49:23,390 --> 00:49:24,070
nan yon tan.

1086
00:49:24,070 --> 00:49:26,860
Se konsa, mwen plis plis ap
aktyalizasyon pa youn chak fwa.

1087
00:49:26,860 --> 00:49:32,310
Si ou te vle mete li pa
de, ou ta ka fè mwen plis egal 2.

1088
00:49:32,310 --> 00:49:34,526
>> ROB BOWDEN: Èske ou te wè
plis egal nan konferans ankò?

1089
00:49:34,526 --> 00:49:35,442
>> ODYANS: [fèbl].

1090
00:49:35,442 --> 00:49:37,440

1091
00:49:37,440 --> 00:49:42,110
>> ALLISON: Se efektivman an
menm bagay kòm mwen egal mwen plis 2.

1092
00:49:42,110 --> 00:49:46,130
Se konsa, li nan pral pran li epi li
mete li pa de chak fwa.

1093
00:49:46,130 --> 00:49:49,432
Plus egal se jis yon bagay
nou rele Massachusetts Institute of Technology sik.

1094
00:49:49,432 --> 00:49:52,390
ROB BOWDEN: Yeah, sa yo ki egziste pou
bèl anpil tout operatè aritmetik.

1095
00:49:52,390 --> 00:49:55,830
Fwa Se konsa, mwen egal a
ta double nimewo a.

1096
00:49:55,830 --> 00:50:02,590
j divize egal 3 se menm bagay la tou
kòm j j egal divize pa 3.

1097
00:50:02,590 --> 00:50:07,399
>> ALLISON: Oswa mwens egal 2 ta
dekrwasans mwen pa de chak fwa.

1098
00:50:07,399 --> 00:50:08,565
ROB BOWDEN: Menm egal mod.

1099
00:50:08,565 --> 00:50:09,690

1100
00:50:09,690 --> 00:50:13,270
Ou pa gen pou wè lojik operatè,
men Lambda egal ak comercial egal,

1101
00:50:13,270 --> 00:50:14,560
tout moun sa yo egziste.

1102
00:50:14,560 --> 00:50:19,480
>> ALLISON: Se konsa, yon anpil nan fwa, espesyalman
ak koup premye ou nan P kouche,

1103
00:50:19,480 --> 00:50:22,527
ou pral pwobableman pa incrementing
yon sèl, se konsa mwen plis plis, j plis plis

1104
00:50:22,527 --> 00:50:24,610
yo se tout bagay sa yo w ap ale
tipikman gen lè l sèvi avèk.

1105
00:50:24,610 --> 00:50:28,240
Men, ke kondisyon aktyalizasyon se
konplètman ki nan kontwòl ou.

1106
00:50:28,240 --> 00:50:32,310
Ou ka mete li pa tou sa ogmantasyon
oswa nan nenpòt ki bò ou deside.

1107
00:50:32,310 --> 00:50:33,389

1108
00:50:33,389 --> 00:50:35,680
Petèt ou menm vle li nan dwe
yon nimewo o aza pafwa.

1109
00:50:35,680 --> 00:50:37,180

1110
00:50:37,180 --> 00:50:39,580
Men, repons lan se wi, gen anpil bagay nan
bagay ou ka fè ak sa.

1111
00:50:39,580 --> 00:50:41,280
Ou pa ap restriksyon nan mwen plis plis.

1112
00:50:41,280 --> 00:50:44,400
>> ROB BOWDEN: Jis pou w
konnen li egziste, li tou

1113
00:50:44,400 --> 00:50:46,960
egziste nan yon lòt fòm, plis plis mwen.

1114
00:50:46,960 --> 00:50:51,410
Se konsa, si w ap janm fouye sou entènèt
ak rive wè plis plis mwen,

1115
00:50:51,410 --> 00:50:52,870
bèl anpil vle di menm bagay la.

1116
00:50:52,870 --> 00:50:54,377

1117
00:50:54,377 --> 00:50:54,960
ALLISON: Cool.

1118
00:50:54,960 --> 00:50:56,070

1119
00:50:56,070 --> 00:50:56,740
Bon?

1120
00:50:56,740 --> 00:50:57,240
Awesome.

1121
00:50:57,240 --> 00:50:59,190

1122
00:50:59,190 --> 00:50:59,990
Se konsa, pandan y ap pasan.

1123
00:50:59,990 --> 00:51:01,160

1124
00:51:01,160 --> 00:51:02,570
Trè sanblab.

1125
00:51:02,570 --> 00:51:03,737
Ou gen kèk kondisyon.

1126
00:51:03,737 --> 00:51:05,820
Bagay la prensipal yo remake
isit la se olye pou yo gen

1127
00:51:05,820 --> 00:51:08,540
twa pati diferan
yo mete kanpe, nou gen yon sèl.

1128
00:51:08,540 --> 00:51:11,090
Nou jis gen kèk kondisyon
ki k ap w tcheke yo.

1129
00:51:11,090 --> 00:51:14,920
Ak nan menm fason an, osi lontan ke
ke kondisyon evalye vre,

1130
00:51:14,920 --> 00:51:16,840
Kòd ou a pral nan kouri.

1131
00:51:16,840 --> 00:51:18,870
Men, si li la fo, li
ap mete fen, deplase

1132
00:51:18,870 --> 00:51:21,930
sou pati nan pwochen nan pwogram ou an.

1133
00:51:21,930 --> 00:51:25,780
Se konsa, sa a se kalite sa ki nan like--
yon bon ekzanp de tcheke

1134
00:51:25,780 --> 00:51:27,215
pou kèk kondisyon nòmal?

1135
00:51:27,215 --> 00:51:29,402

1136
00:51:29,402 --> 00:51:30,235
GABRIEL: Pandan ke vre.

1137
00:51:30,235 --> 00:51:32,110
ALLISON: Ou ta ka fè pandan y ap vre.

1138
00:51:32,110 --> 00:51:33,510
Oke, 1 ki egal a 1.

1139
00:51:33,510 --> 00:51:34,970

1140
00:51:34,970 --> 00:51:37,642
>> ROB BOWDEN: Ou ka fè while--
jis olye pou yo lè l sèvi avèk yon pou riban,

1141
00:51:37,642 --> 00:51:39,600
ou ka toujou Kòd yon
pou bouk nan yon riban pandan y ap,

1142
00:51:39,600 --> 00:51:42,600
Se konsa, mwen pi gran pase 0 oswa
pandan y ap mwen mwens pase 10.

1143
00:51:42,600 --> 00:51:45,200

1144
00:51:45,200 --> 00:51:46,010
>> ALLISON: Awesome.

1145
00:51:46,010 --> 00:51:50,640
Lè sa a, nou te fè pandan y ap pasan, ki
se gwo pou itilizatè validation, kote

1146
00:51:50,640 --> 00:51:55,370
ou vle jwenn yon bagay soti nan
itilizatè ou, wè si li nan ki valab,

1147
00:51:55,370 --> 00:51:57,060
ak Lè sa a kontinye soti nan la.

1148
00:51:57,060 --> 00:52:04,000
Se konsa, youn nan bagay ki yo konnen se ak yon
fè pandan y ap se ke li k ap pase yo egzekite,

1149
00:52:04,000 --> 00:52:08,000
ak Lè sa a li pral re-egzekite
si se kondisyon sa a te rankontre.

1150
00:52:08,000 --> 00:52:11,240
>> Se konsa, pwobableman fason ki pi byen fè sa a
se jis yo wè yon egzanp isit la.

1151
00:52:11,240 --> 00:52:14,620
Se konsa, kòm mwen jis mansyone, itilizatè
validation se reyèlman useful--

1152
00:52:14,620 --> 00:52:17,520
oswa fè whiles yo se reyèlman
itil ak itilizatè validation.

1153
00:52:17,520 --> 00:52:19,730
Se konsa, sa se jis ale
re-èd memwa kèk itilizatè

1154
00:52:19,730 --> 00:52:23,640
jiskaske yo antre nan yon chif pozitif,
ki ta ka itil pou P seri ou

1155
00:52:23,640 --> 00:52:24,190
semèn sa a.

1156
00:52:24,190 --> 00:52:25,850

1157
00:52:25,850 --> 00:52:29,480
Se konsa, nan ka sa a, lè nou
okòmansman kouri pwogram sa a,

1158
00:52:29,480 --> 00:52:32,260
li pral ekri ak lèt ​​detache
antre nan yon chif pozitif.

1159
00:52:32,260 --> 00:52:34,810
Li nan ale nan jwenn kèk
D 'soti nan itilizatè a,

1160
00:52:34,810 --> 00:52:38,320
ak Lè sa a li a pral tcheke
ki D 'kont kondisyon an

1161
00:52:38,320 --> 00:52:39,500
ke ou te fikse pou li.

1162
00:52:39,500 --> 00:52:41,030
>> Se konsa, nan ka sa a li k ap pase yo tcheke.

1163
00:52:41,030 --> 00:52:44,190
Li nan ale nan di, OK,
se opinyon nou an negatif,

1164
00:52:44,190 --> 00:52:47,175
oswa se li 0 oswa negatif,
ki ta dwe valab.

1165
00:52:47,175 --> 00:52:48,300
Se konsa, Lè sa a, li ta re-èd memwa.

1166
00:52:48,300 --> 00:52:50,280

1167
00:52:50,280 --> 00:52:50,780
Kesyon?

1168
00:52:50,780 --> 00:52:54,720
>> ODYANS: Èske sa se menm bagay la tou Lè sa a, kòm yon
pandan y ap riban si ou jis kopye ke kòd

1169
00:52:54,720 --> 00:52:56,680
li mete l '[fèbl] pandan y ap riban?

1170
00:52:56,680 --> 00:52:59,620

1171
00:52:59,620 --> 00:53:05,160
>> ALLISON: Se konsa, kesyon te ta
sa a pral menm bagay la kòm jis yon ti tan

1172
00:53:05,160 --> 00:53:08,570
bouk si nou te jis
kopi riban an pandan y ap pi wo a.

1173
00:53:08,570 --> 00:53:12,440
Se konsa, nan ka sa a, riban pandan y ap ou a se
ale nan tcheke kondisyon an premye.

1174
00:53:12,440 --> 00:53:15,300
Se konsa, nan ka sa a, si nou te eseye
yo ekri kòm jis yon riban pandan y ap,

1175
00:53:15,300 --> 00:53:18,010
li ta di pandan y ap
D 'se mwens pase yon sèl.

1176
00:53:18,010 --> 00:53:20,801
Men, nou pa gen yon D 'pou li.

1177
00:53:20,801 --> 00:53:24,238
>> ODYANS: Si ou [fèbl]
pandan y ap riban ki gen ladan sa a kòd,

1178
00:53:24,238 --> 00:53:28,166
men Lè sa a ou coped kòd la
pi wo a riban a pandan y ap tou.

1179
00:53:28,166 --> 00:53:31,052
Ou jis te gen sa a kòd
[Fèbl] pandan y ap riban.

1180
00:53:31,052 --> 00:53:32,760
ALLISON: Li ta
menm bagay la, repons lan se wi.

1181
00:53:32,760 --> 00:53:37,110
Se konsa, ou ta ka jis write--
olye pou yo gen yon repons lan se wi do--.

1182
00:53:37,110 --> 00:53:37,976

1183
00:53:37,976 --> 00:53:39,350
GABRIEL: Men, sa a plis elegant.

1184
00:53:39,350 --> 00:53:41,020
ALLISON: Yeah, sa a, se plis elegant.

1185
00:53:41,020 --> 00:53:44,560
Ou ka jwenn nan konsepsyon ak etajèr,
men repons lan se wi, ou ka totalman fè sa.

1186
00:53:44,560 --> 00:53:45,850

1187
00:53:45,850 --> 00:53:47,072
Nenpòt lòt kesyon?

1188
00:53:47,072 --> 00:53:49,240

1189
00:53:49,240 --> 00:53:50,250
OK, fre.

1190
00:53:50,250 --> 00:53:55,540
>> Se konsa, nou te pale yon anpil sou kondisyon
ak tout sa yo pasan ke nou gen,

1191
00:53:55,540 --> 00:53:58,615
se konsa nou ap aktyèlman ap resevwa nan
kondisyon nan ekspresyon Boolean.

1192
00:53:58,615 --> 00:53:59,990

1193
00:53:59,990 --> 00:54:03,440
Ankò, ou sèvi ak sa yo nan C,
Se konsa, jis kalite tranzisyon

1194
00:54:03,440 --> 00:54:06,050
soti nan plis koòdone grafik
yo aktyèlman kodaj.

1195
00:54:06,050 --> 00:54:07,480

1196
00:54:07,480 --> 00:54:09,100
>> Cool, tèlman gwo yon sèl, si.

1197
00:54:09,100 --> 00:54:11,130

1198
00:54:11,130 --> 00:54:17,070
Fondamantalman jis pèmèt nou prezante
kèk lojik nan pwogram nou yo ak chèk

1199
00:54:17,070 --> 00:54:17,790
kondisyon SYS.

1200
00:54:17,790 --> 00:54:22,150
Se konsa, nan ka sa a, OK,
se n pi gran pase 0?

1201
00:54:22,150 --> 00:54:24,070
Wi li se, kidonk, ou ka egzekite sa a.

1202
00:54:24,070 --> 00:54:28,060
Li nan jis tcheke kèk
kondisyon ki ou te

1203
00:54:28,060 --> 00:54:33,565
mete, ki mwen panse ke nou ap tout
konfòtab ak tcheke kondisyon.

1204
00:54:33,565 --> 00:54:35,975

1205
00:54:35,975 --> 00:54:36,475
Fre.

1206
00:54:36,475 --> 00:54:38,760

1207
00:54:38,760 --> 00:54:44,530
Se konsa, si lòt bagay se lòt yon sèl ou,
ou ka di OK, si sa a se vre,

1208
00:54:44,530 --> 00:54:46,150
fè sa nan premye bagay.

1209
00:54:46,150 --> 00:54:48,720
Sinon mwen vle nou
default ak fè yon lòt bagay.

1210
00:54:48,720 --> 00:54:51,977

1211
00:54:51,977 --> 00:54:55,060
Menm jan ak nan ka sa a, ou swa chwazi yon
Nimewo pozitif oswa yon chif negatif.

1212
00:54:55,060 --> 00:54:56,500
Ou gen sèlman de chwa.

1213
00:54:56,500 --> 00:54:59,550
Ou bezwen li al touye kèlkeswa
nan sa ki entrain itilizatè ou an.

1214
00:54:59,550 --> 00:55:02,920
Se konsa, ou ka di byen,
se li pi gran pase 0?

1215
00:55:02,920 --> 00:55:03,480
Fre.

1216
00:55:03,480 --> 00:55:04,480
Enprime yon chif pozitif.

1217
00:55:04,480 --> 00:55:06,153
Si li pa, enprime yon negatif.

1218
00:55:06,153 --> 00:55:06,960
Tout moun sa ki bon?

1219
00:55:06,960 --> 00:55:14,920
>> Lè sa a, yon sèl bagay yo rekonèt se
ke si yo si kondisyon an te rankontre,

1220
00:55:14,920 --> 00:55:16,650
lòt la pa janm pral tou egzekite.

1221
00:55:16,650 --> 00:55:19,210
Se sèlman youn nan sa yo pral
egzekite nan yon tan.

1222
00:55:19,210 --> 00:55:20,410
Se konsa, li yon komès la.

1223
00:55:20,410 --> 00:55:21,720
Ou pa jwenn yo gen tou de.

1224
00:55:21,720 --> 00:55:23,566
Ou swa gen kondisyon an premye.

1225
00:55:23,566 --> 00:55:25,440
Ou swa gen la si
oswa lòt moun, pa tou de la.

1226
00:55:25,440 --> 00:55:26,849

1227
00:55:26,849 --> 00:55:28,890
Ki Lè sa a, ka fè bagay sa yo
menm plis konplike,

1228
00:55:28,890 --> 00:55:31,060
paske ou ka fè si,
lòt moun li, ak Lè sa lòt bagay.

1229
00:55:31,060 --> 00:55:32,810
Se konsa, nan ka sa a, nou
gen twa kondisyon.

1230
00:55:32,810 --> 00:55:34,830

1231
00:55:34,830 --> 00:55:38,370
Epi ankò, se sèlman youn nan sa yo se
ale nan fini ke yo te egzekite.

1232
00:55:38,370 --> 00:55:41,030
Se konsa, ou ka mande
byen, sa ki si ou

1233
00:55:41,030 --> 00:55:45,510
gen yon bagay ki
ka rankontre de nan sa yo.

1234
00:55:45,510 --> 00:55:49,520
Petèt tou sa w ap Anthrax
satisfè tou de kondisyon an

1235
00:55:49,520 --> 00:55:51,811
pou si ak lòt bagay la si.

1236
00:55:51,811 --> 00:55:53,060
Se sèlman bagay ki k ap pase nan kouri

1237
00:55:53,060 --> 00:55:56,240
>> ALLISON: Le pli vit ke li jwenn yon bagay
ke li satisfè kondisyon an pou sa

1238
00:55:56,240 --> 00:55:59,790
evalye vre, se sa ki
li a pral kouri e pa gen anyen lòt bagay.

1239
00:55:59,790 --> 00:56:04,440
Se konsa, si ou te gen se nimewo sa a
ant 0 ak 5 pou yon premye ou a,

1240
00:56:04,440 --> 00:56:10,530
oswa se nimewo sa a ant 3
ak 5 pou lòt moun nan si pati,

1241
00:56:10,530 --> 00:56:15,550
epi ou D 'number-- la
M 'te di 0 ak 5 and-- 4.

1242
00:56:15,550 --> 00:56:18,110
Li nan ale nan frape youn la an premye.

1243
00:56:18,110 --> 00:56:20,960
Li nan ale nan di OK, sa a
Nimewo a se ant 0 ak 5.

1244
00:56:20,960 --> 00:56:22,480
Egzekite epi kite.

1245
00:56:22,480 --> 00:56:25,340
Li pa janm pral frape ke dezyèm opsyon.

1246
00:56:25,340 --> 00:56:26,394
Cool?

1247
00:56:26,394 --> 00:56:27,250
Awesome.

1248
00:56:27,250 --> 00:56:31,300
>> OK nou gen tou switch deklarasyon si
ou vle jwenn menm more-- oswa regrèt sa,

1249
00:56:31,300 --> 00:56:31,965
switch se kap vini an.

1250
00:56:31,965 --> 00:56:33,540

1251
00:56:33,540 --> 00:56:34,990
Mwen ap resevwa devan yo nan tèt mwen isit la.

1252
00:56:34,990 --> 00:56:36,370

1253
00:56:36,370 --> 00:56:39,210
Yon fwa ankò, plizyè si blòk
kote kòm mwen jis te di

1254
00:56:39,210 --> 00:56:45,600
se le pli vit ke ou jwenn yon kondisyon
ki nan te rankontre ak yon si lòt moun si lòt moun,

1255
00:56:45,600 --> 00:56:46,630
li kite.

1256
00:56:46,630 --> 00:56:49,560
Si ou bezwen yo tcheke
miltip bagay sa yo, w ap

1257
00:56:49,560 --> 00:56:53,000
ale nan vle sèvi ak paske sa a
li pral tcheke pou wè chak fwa isit la.

1258
00:56:53,000 --> 00:56:58,060
Se konsa, sa a pral kouri nan epi si
li nan pi gran pase oswa egal a 90,

1259
00:56:58,060 --> 00:56:59,160
li pral ekri ak lèt ​​detache sa.

1260
00:56:59,160 --> 00:57:00,530

1261
00:57:00,530 --> 00:57:03,600
Epi li pral kouri nan ak
tcheke chak yon sèl nan sa yo.

1262
00:57:03,600 --> 00:57:06,444
>> ODYANS: Se konsa sa a ta dwe
plis buggy pase [fèbl].

1263
00:57:06,444 --> 00:57:07,735
Ta dwe tankou sa a [fèbl]?

1264
00:57:07,735 --> 00:57:10,990

1265
00:57:10,990 --> 00:57:15,740
>> ALLISON: Kesyon an se ta sa a gen
buggy oswa sa a fè sa ou vle.

1266
00:57:15,740 --> 00:57:19,830
Li reyèlman depann de sa ki
ou vle soti nan pwogram ou an.

1267
00:57:19,830 --> 00:57:22,291
>> ODYANS: Mwen vle di tankou si ou mete 90 an.

1268
00:57:22,291 --> 00:57:23,290
ALLISON: Si ou mete 90--

1269
00:57:23,290 --> 00:57:24,206
ODYANS: [fèbl].

1270
00:57:24,206 --> 00:57:25,584

1271
00:57:25,584 --> 00:57:27,250
GABRIEL: W ap ale nan jwenn de bagay sa yo.

1272
00:57:27,250 --> 00:57:28,916
ALLISON: W ap ale nan jwenn de bagay sa yo.

1273
00:57:28,916 --> 00:57:29,420
Wi, de.

1274
00:57:29,420 --> 00:57:32,420

1275
00:57:32,420 --> 00:57:33,920
>> ROB BOWDEN: De?

1276
00:57:33,920 --> 00:57:34,580
>> ALLISON: No

1277
00:57:34,580 --> 00:57:35,288
>> ROB BOWDEN: Kat.

1278
00:57:35,288 --> 00:57:37,070

1279
00:57:37,070 --> 00:57:40,070
Si ou mete 90, li nan ale nan di ou
te resevwa yon A, ou te resevwa yon B, ou te resevwa yon C,

1280
00:57:40,070 --> 00:57:40,545
ou te resevwa yon D.

1281
00:57:40,545 --> 00:57:41,461
>> ODYANS: [fèbl].

1282
00:57:41,461 --> 00:57:42,196

1283
00:57:42,196 --> 00:57:42,820
ALLISON: Dwa.

1284
00:57:42,820 --> 00:57:44,778
Se konsa, mwen depann de sa ki ou
vle soti nan pwogram ou.

1285
00:57:44,778 --> 00:57:47,050
Pafwa ou bezwen
tcheke miltip bagay sa yo.

1286
00:57:47,050 --> 00:57:49,970

1287
00:57:49,970 --> 00:57:55,270
Ou ap jwenn anpil pi fon nan sa ki
bon konsepsyon se jan ou ale pi devan.

1288
00:57:55,270 --> 00:57:57,090
Sa ki enpòtan
reyalize se ke sa a

1289
00:57:57,090 --> 00:58:01,090
pral tcheke pou wè tout kat kondisyon isit la.

1290
00:58:01,090 --> 00:58:05,860
Lè nou konsidere ke si sa a te yon si lòt moun si lòt moun
si lòt moun, li ta frape ke ka premye,

1291
00:58:05,860 --> 00:58:07,950
li ta enprime ou te resevwa yon A ak dwe fè.

1292
00:58:07,950 --> 00:58:10,250
>> ROB BOWDEN: Menm si nou
deside chanje sa a yo si

1293
00:58:10,250 --> 00:58:13,880
ak pi gran pase oswa egal a 90,
si ak pi gran pase oswa egal a 80,

1294
00:58:13,880 --> 00:58:19,710
ak mwens pase oswa egal a 89, si
n pi gran pase oswa egal a 70,

1295
00:58:19,710 --> 00:58:23,830
ak n mwens pase oswa egal a
79, se konsa ke yo pral kòrèk.

1296
00:58:23,830 --> 00:58:27,190
Ki pral fè sa nou vle, men
li toujou chèk chak yon sèl li.

1297
00:58:27,190 --> 00:58:34,050
>> Se konsa, Lè nou konsidere ke nan senaryo a an premye, si nou
antre nan 90 ak jis si lòt moun si lòt moun si,

1298
00:58:34,050 --> 00:58:37,300
epi nou antre nan 90, Lè sa a,
li a pral korije.

1299
00:58:37,300 --> 00:58:39,615
Li pral tcheke pou wè premye a
yon sèl, ekri ak lèt ​​detache ou te resevwa yon A,

1300
00:58:39,615 --> 00:58:42,590
sote tout bagay, paske li
deja jwenn youn ki travay.

1301
00:58:42,590 --> 00:58:46,360
Tout ka yo se mityèlman eksklizif
ki baze sou ki si lòt moun si lòt moun si.

1302
00:58:46,360 --> 00:58:48,630
Se konsa, li pral egzekite nan
premye si, lè sa a li fè.

1303
00:58:48,630 --> 00:58:49,790
Li pral ale nan fen an.

1304
00:58:49,790 --> 00:58:52,400
>> Lè nou konsidere ke si nou chanje
sa a yo dwe ki sa mwen te

1305
00:58:52,400 --> 00:58:54,204
li di ki gen mwens pase oswa egal a 89.

1306
00:58:54,204 --> 00:58:55,620
Li nan ale nan tcheke youn la an premye.

1307
00:58:55,620 --> 00:58:56,560
Li pral enprime.

1308
00:58:56,560 --> 00:58:58,010
Li pral tcheke youn, dezyèm lan.

1309
00:58:58,010 --> 00:58:59,010
Li pa nan ale nan enprime.

1310
00:58:59,010 --> 00:58:59,910
Tcheke youn nan twazyèm.

1311
00:58:59,910 --> 00:59:00,620
Pa ale nan ekri ak lèt ​​detache.

1312
00:59:00,620 --> 00:59:01,495
Tcheke youn nan katriyèm.

1313
00:59:01,495 --> 00:59:02,420
Koulye a, pral enprime.

1314
00:59:02,420 --> 00:59:05,380
Se konsa, nan ka sa a, lòt moun nan si
vèsyon, depi ka sa yo

1315
00:59:05,380 --> 00:59:09,120
yo se mityèlman eksklizif, li nan
pi bon itilize si lòt moun si lòt moun si,

1316
00:59:09,120 --> 00:59:12,970
paske sa ki pral gen
mwens chèk nan kondisyon sa yo

1317
00:59:12,970 --> 00:59:14,750
pase vèsyon sa a.

1318
00:59:14,750 --> 00:59:17,692

1319
00:59:17,692 --> 00:59:18,400
ALLISON: Awesome.

1320
00:59:18,400 --> 00:59:20,580
Se konsa, yon lòt bagay nou kapab
fè se deklarasyon switch.

1321
00:59:20,580 --> 00:59:23,104

1322
00:59:23,104 --> 00:59:25,270
Fondamantalman yon deklarasyon switch
pran nan kèk varyab,

1323
00:59:25,270 --> 00:59:28,780
nan ka sa a li nan n, ak
detèmine ka sa a al touye.

1324
00:59:28,780 --> 00:59:33,106
Se konsa, sa a se tou yon sèl kote ka ou
yo ta dwe kalite mityèlman eksklizif.

1325
00:59:33,106 --> 00:59:35,210

1326
00:59:35,210 --> 00:59:37,940
Se konsa, nan ka sa a, si
nou nou jwenn yon yon sèl, li nan

1327
00:59:37,940 --> 00:59:42,270
ale nan matche ak tou sa ki
variable-- tou sa valè a nan n

1328
00:59:42,270 --> 00:59:48,700
se nan youn nan ka sa yo, se konsa 1, 2, oswa
3, ak enprime soti liy ki koresponn lan.

1329
00:59:48,700 --> 00:59:51,870
>> Lè sa a, si w remake isit la,
nou gen tou yon default,

1330
00:59:51,870 --> 00:59:54,670
ki ou ka nan panse a kòm lòt moun ou yo.

1331
00:59:54,670 --> 00:59:58,510
Se konsa, si ou chwazi nenpòt lòt nimewo
san konte 1, 2, ak 3 nan ka sa a

1332
00:59:58,510 --> 00:59:59,885
li jis ale nan enprime valab.

1333
00:59:59,885 --> 01:00:03,690

1334
01:00:03,690 --> 01:00:08,390
N ap deside lè yo sèvi ak ifs kont
si elses kont switch ki pral

1335
01:00:08,390 --> 01:00:12,590
yo dwe yon bagay ke ou nèg pral
wè konsepsyon ki gen bon konprann jan ou kòmanse ekri

1336
01:00:12,590 --> 01:00:15,270
pwogram pi konplike, ak
gen nan pa gen règ fò e rapid

1337
01:00:15,270 --> 01:00:16,330
nan lè yo sèvi ak yo.

1338
01:00:16,330 --> 01:00:17,890
Li reyèlman depann de kontèks ou yo.

1339
01:00:17,890 --> 01:00:18,590
>> ROB BOWDEN: Ak jis
voye jete byen yo deyò

1340
01:00:18,590 --> 01:00:20,131
depi li se pi alèz seksyon.

1341
01:00:20,131 --> 01:00:20,920

1342
01:00:20,920 --> 01:00:25,053
Switch, yo gen tandans
be-- se konsa w ap limite

1343
01:00:25,053 --> 01:00:27,430
nan kantite fason ou
ka sèvi ak yo, paske ifs,

1344
01:00:27,430 --> 01:00:30,100
kondisyon an ka trè
pi anyen ou vle.

1345
01:00:30,100 --> 01:00:33,410
Avèk switch ka yo
gen yo dwe nimewo,

1346
01:00:33,410 --> 01:00:37,770
oswa teknikman yo ka charaktèr, men
charaktèr, menm jan nou pral wè, yo se chif jis.

1347
01:00:37,770 --> 01:00:44,250
Se konsa, yo gen yo dwe nimewo, men switch
yo se reyèlman pi efikas pase si

1348
01:00:44,250 --> 01:00:50,060
lòt moun si lòt moun si, paske menm
pran egzanp lan fè anvan byen,

1349
01:00:50,060 --> 01:00:51,486
egzanp lan klas sanble bon.

1350
01:00:51,486 --> 01:00:52,550

1351
01:00:52,550 --> 01:00:57,080
>> Oke kite a di isit la, nou olye fè
sa a kòm yon si lòt moun si lòt moun si senaryo.

1352
01:00:57,080 --> 01:01:00,930
Se konsa, si n egal egal 1,
ekri ak lèt ​​detache ou te chwazi yon nimewo ki ba.

1353
01:01:00,930 --> 01:01:04,490
Si lòt moun si n egal egal 2,
ou te chwazi yon nimewo medyòm.

1354
01:01:04,490 --> 01:01:06,550
Lòt Bagay si egal egal 3, segondè.

1355
01:01:06,550 --> 01:01:08,060
Lòt Bagay valab.

1356
01:01:08,060 --> 01:01:09,820
>> Se konsa nou di sa ki te senaryo nou an.

1357
01:01:09,820 --> 01:01:14,060
Se konsa nou di nou antre
4, se konsa nou espere valab.

1358
01:01:14,060 --> 01:01:17,410
Fason ki ke si lòt moun si lòt moun
si apwòch ki pral travay se

1359
01:01:17,410 --> 01:01:18,740
chèk kondisyon an premye.

1360
01:01:18,740 --> 01:01:19,776
Li pa nan satisfè.

1361
01:01:19,776 --> 01:01:21,150
Se konsa, nou tcheke kondisyon an dezyèm fwa.

1362
01:01:21,150 --> 01:01:21,940
Li pa nan satisfè.

1363
01:01:21,940 --> 01:01:23,023
Tcheke kondisyon an twazyèm.

1364
01:01:23,023 --> 01:01:23,640
Pa satisfè.

1365
01:01:23,640 --> 01:01:26,650
Se konsa, nou ale nan lòt la epi enprime valab.

1366
01:01:26,650 --> 01:01:30,169
>> Fason ki travay yo switch
se li compiles desann

1367
01:01:30,169 --> 01:01:31,960
nan sa nou ap ale
yo rele yon tab sote.

1368
01:01:31,960 --> 01:01:33,180

1369
01:01:33,180 --> 01:01:37,120
Ke yo te nan ide prensipal
ki lè ou antre nan 4,

1370
01:01:37,120 --> 01:01:39,090
li ka imedyatman ale nan default la.

1371
01:01:39,090 --> 01:01:41,460
Li pa bezwen tcheke am ka mwen 1?

1372
01:01:41,460 --> 01:01:42,350
Nope sa a, se pa li.

1373
01:01:42,350 --> 01:01:42,850
Ka 2?

1374
01:01:42,850 --> 01:01:43,240
Non.

1375
01:01:43,240 --> 01:01:43,770
Ka 3?

1376
01:01:43,770 --> 01:01:44,270
Non.

1377
01:01:44,270 --> 01:01:45,090
Default.

1378
01:01:45,090 --> 01:01:47,610
OK, sa a dwe kote mwen
vle, ak Lè sa a, egzekite sa.

1379
01:01:47,610 --> 01:01:49,590
Non, li imedyatman sote nan default la.

1380
01:01:49,590 --> 01:01:51,900
Oswa li mwen antre 2, li la
imedyatman ale nan ale nan 2 a

1381
01:01:51,900 --> 01:01:54,060
san yo pa bezwen yo ale nan ka 1.

1382
01:01:54,060 --> 01:01:57,820
>> Se konsa, nan fason sa a,
pli reyèlman sèjousi sa a, se

1383
01:01:57,820 --> 01:02:00,250
pa sa ki anpil nan yon benefis efikasite.

1384
01:02:00,250 --> 01:02:02,880
Anjeneral òdinatè yo trè
vit, ak sa a, se pa sa ki gwo.

1385
01:02:02,880 --> 01:02:07,270
Men, li se ka a ke
switch yo pi vit.

1386
01:02:07,270 --> 01:02:10,380
Si w ap reyèlman ap
yo optimize, sèvi ak yon switch.

1387
01:02:10,380 --> 01:02:11,980

1388
01:02:11,980 --> 01:02:12,710
>> ALLISON: Cool.

1389
01:02:12,710 --> 01:02:15,270
Lè sa a, nou gen tèrsyèr operatè.

1390
01:02:15,270 --> 01:02:19,470
Se konsa, mwen konnen mwen mansyone pi bonè
pawòl Bondye a Massachusetts Institute of Technology sik.

1391
01:02:19,470 --> 01:02:24,160
Se konsa, li nan jis bagay ki fè
kòd ou a pi plis brèf.

1392
01:02:24,160 --> 01:02:25,590
Se konsa, sa a se youn nan ka sa yo.

1393
01:02:25,590 --> 01:02:31,430
>> Se konsa, tèrsyèr operatè se kesyon mak
kolon jan nou wè nan fisèl la liy

1394
01:02:31,430 --> 01:02:35,810
a egal n pi gran pase 100
kesyon mak segondè kolon ki ba.

1395
01:02:35,810 --> 01:02:41,800
Se konsa, fondamantalman ki jan sa a ap travay se li nan
n nan pi gwo pase 100 se yon kondisyon.

1396
01:02:41,800 --> 01:02:43,674
Se konsa, mwen panse ke li ka fè sans.

1397
01:02:43,674 --> 01:02:44,840
Se tankou mande yon kesyon.

1398
01:02:44,840 --> 01:02:47,320
Li nan di oh, se n pi gran pase 100.

1399
01:02:47,320 --> 01:02:48,340
Ki moun ki konnen?

1400
01:02:48,340 --> 01:02:50,750
Men, si li evalye
vre, li nan ale nan ba ou

1401
01:02:50,750 --> 01:02:54,270
bagay la premye sa a, se
ki nan lis la, ki se segondè.

1402
01:02:54,270 --> 01:02:55,840
Sinon li a pral ba ou ki ba.

1403
01:02:55,840 --> 01:03:01,210
Se konsa, sa a se jis yon vrèman senp epi
fason efikas fè tankou yon si lòt bagay.

1404
01:03:01,210 --> 01:03:02,780
Sa a tout sa a se.

1405
01:03:02,780 --> 01:03:07,450
>> Men, si nou te ekri sa a
kòm yon lòt bagay si kondisyonèl,

1406
01:03:07,450 --> 01:03:12,480
li ta si n pi gran
pase 100, retounen segondè.

1407
01:03:12,480 --> 01:03:14,220
Lòt Bagay, retounen ba.

1408
01:03:14,220 --> 01:03:17,570
Sa a se jis yon pi plis
kout fason pou ekri li.

1409
01:03:17,570 --> 01:03:27,090
>> ROB BOWDEN: Se konsa, sa a egzanp patikilye
se nenpòt lè ou ap fè yon bagay

1410
01:03:27,090 --> 01:03:30,190
tankou sa a, sa a se modèl la
kote mwen sèvi ak tèrsyèr trè souvan.

1411
01:03:30,190 --> 01:03:31,540

1412
01:03:31,540 --> 01:03:35,460
Se konsa, nou pa t 'te pale osijè de sijè ki abòde ankò,
men mwen rayi wè virgules fisèl la.

1413
01:03:35,460 --> 01:03:39,150
Si n pi gran pase 100, s egal segondè.

1414
01:03:39,150 --> 01:03:40,660
Lòt Bagay, s egal ba.

1415
01:03:40,660 --> 01:03:45,070
Se konsa, ki modèl, sa yo ki senk liy
nan kòd literalman 100% nan tan an

1416
01:03:45,070 --> 01:03:49,800
kapab transfere nan sa ki
te moute la ansanm ak yon tèrsyèr.

1417
01:03:49,800 --> 01:03:52,340
Se konsa, tèrsyèr la, yon sèl liy nan kòd.

1418
01:03:52,340 --> 01:03:54,640
Si nan lòt moun, senk.

1419
01:03:54,640 --> 01:03:56,910
Sa a yon egzanp mwen pwen
soti chak fwa sèl.

1420
01:03:56,910 --> 01:03:59,250
Sa a ta gwo plas
pou yon operatè tèrsyèr.

1421
01:03:59,250 --> 01:04:00,647
Li nan tèlman pwòp.

1422
01:04:00,647 --> 01:04:01,980
Men, moun yo gen tandans pa janm sèvi ak li.

1423
01:04:01,980 --> 01:04:06,140

1424
01:04:06,140 --> 01:04:08,030
>> ALLISON: Pran l 'ale Gabe.

1425
01:04:08,030 --> 01:04:11,110
>> GABRIEL: Se konsa, kounye a ou nèg tout
aprann nan konferans semèn sa a

1426
01:04:11,110 --> 01:04:13,420
ke tout bagay nan yon
òdinatè se binè, dwa?

1427
01:04:13,420 --> 01:04:14,570
Jis tankou ti lanp yo isit la.

1428
01:04:14,570 --> 01:04:16,492
Ou kapab swa vire sou yo ak sou.

1429
01:04:16,492 --> 01:04:18,450
Ak pa tout bagay, mwen vle di
literalman tout bagay.

1430
01:04:18,450 --> 01:04:24,272
Gen kèk chif, ak charaktèr, ak strings,
e menm kòd la ke ou ekri lè

1431
01:04:24,272 --> 01:04:26,480
li vin konpile nan machin
Kòd ak lòt bagay tankou sa yo,

1432
01:04:26,480 --> 01:04:29,230
se konsa li tout klou desann nan 0 a ak 1 '.

1433
01:04:29,230 --> 01:04:34,540
>> Se konsa, lè nou ap fè fas
ak nonm antye relatif, ki

1434
01:04:34,540 --> 01:04:38,000
se yon bagay sa a, se teknikman trè
senp, nou ta dwe kapab fè bagay

1435
01:04:38,000 --> 01:04:40,630
tankou ajoute yo, ki se
pwobableman youn nan bagay ki pi senp

1436
01:04:40,630 --> 01:04:42,300
ou ka fè nan de nonm antye yo, dwa?

1437
01:04:42,300 --> 01:04:47,410
Se konsa, adisyon ak soustraksyon travay jis
tankou li ap travay nan notasyon desimal,

1438
01:04:47,410 --> 01:04:50,780
eksepte isit la li nan binè, dwa?

1439
01:04:50,780 --> 01:04:52,090
Se konsa, li nan baz de.

1440
01:04:52,090 --> 01:04:54,070
Se konsa, ajoute 1 plis 1.

1441
01:04:54,070 --> 01:04:57,020
Ki bay 0, ak 1 pote sou.

1442
01:04:57,020 --> 01:05:01,335
Ak jis kontinye ap fè sa, Se konsa, kounye
vini kesyon an plis enteresan.

1443
01:05:01,335 --> 01:05:03,730

1444
01:05:03,730 --> 01:05:07,710
>> Nou konnen ki jan yo reprezante tout
nonm antye relatif pozitif nan òdinatè a,

1445
01:05:07,710 --> 01:05:09,870
men kite a fè sa-a yon fè egzèsis.

1446
01:05:09,870 --> 01:05:15,240
Pran pòz ou nèg, yo tout nan lane 1960 oswa
yon bagay ap eseye kreye yon òdinatè,

1447
01:05:15,240 --> 01:05:19,950
epi ou gen vini nan
yon fason pou estoke mwens 1,

1448
01:05:19,950 --> 01:05:22,554
pou egzanp, oswa mwens nenpòt
nonb antye relatif pou ki matyè.

1449
01:05:22,554 --> 01:05:23,470
Kouman ou ta fè sa?

1450
01:05:23,470 --> 01:05:27,820

1451
01:05:27,820 --> 01:05:29,220
Nenpòt lide?

1452
01:05:29,220 --> 01:05:31,302
Jis voye jete anyen nan m '.

1453
01:05:31,302 --> 01:05:32,264
Wi?

1454
01:05:32,264 --> 01:05:39,480
>> ODYANS: [fèbl] deziyen
yon espesyal si ou [fèbl].

1455
01:05:39,480 --> 01:05:42,590
>> GABRIEL: Ou ka deziyen yon
ti jan espesyal, ki pral 0 oswa 1.

1456
01:05:42,590 --> 01:05:45,590
Se pou nou di yon sèl si li nan pozitif
ak 0 si li nan negatif.

1457
01:05:45,590 --> 01:05:48,171
Lè sa a, rès la nan ti jan a
se jis nan magazen nimewo a.

1458
01:05:48,171 --> 01:05:48,670
Fre.

1459
01:05:48,670 --> 01:05:49,990
Se konsa, sa a, se yon trè bon lide.

1460
01:05:49,990 --> 01:05:51,550
Nou gen, Mwen pa konnen, 200.

1461
01:05:51,550 --> 01:05:54,720
Men, si ti jan nan premye se
vire sou, Lè sa a, li nan plis 200.

1462
01:05:54,720 --> 01:05:57,270
Si li la etenn, li se mwens 200.

1463
01:05:57,270 --> 01:05:58,380
Fre.

1464
01:05:58,380 --> 01:06:01,350
>> Gen yon sèl ti
pwoblèm ak sa a,

1465
01:06:01,350 --> 01:06:05,370
ki se si nou eseye sòm bagay yo.

1466
01:06:05,370 --> 01:06:18,910
Se konsa, imajine nou gen 11111 isit la, ak
nou ap adisyon sa a ak 00100 kèlkeswa sa.

1467
01:06:18,910 --> 01:06:21,630
Si moun ki de yo se pozitif, sa a, se amann.

1468
01:06:21,630 --> 01:06:24,470
Men, Lè sa si youn nan
yo se negatif, tankou

1469
01:06:24,470 --> 01:06:27,410
kite a di ke sa a ti jan isit la
se youn nan sa a, se responsab

1470
01:06:27,410 --> 01:06:31,390
for-- mwen pral fè yon separate--
se konsa yon sèl sa a vle di ke nimewo sa a isit la

1471
01:06:31,390 --> 01:06:31,970
se pozitif.

1472
01:06:31,970 --> 01:06:34,450
Sa a yon sèl vle di ke sa a
Nimewo isit la se negatif, dwa?

1473
01:06:34,450 --> 01:06:37,010
>> Men, Lè sa lè w ap
ale nan sòm yo, ou

1474
01:06:37,010 --> 01:06:40,180
bezwen yon si deklarasyon
li di oh si sa a se 0,

1475
01:06:40,180 --> 01:06:43,479
Lè sa a, sòm mwen yo ki pral
yon bagay diferan, dwa?

1476
01:06:43,479 --> 01:06:45,270
Se konsa, gen nan yon yon ti kras
plis entelijan fason yo fè

1477
01:06:45,270 --> 01:06:48,520
ki, ki te rele konpleman de la.

1478
01:06:48,520 --> 01:06:52,350
Se konsa, fondamantalman sa nou
fè se nou defini mwens 1

1479
01:06:52,350 --> 01:06:57,250
yo dwe bagay la ke si
nou ajoute jiska 1 ban nou 0.

1480
01:06:57,250 --> 01:06:59,470

1481
01:06:59,470 --> 01:07:00,860
Kite m 'repete sa.

1482
01:07:00,860 --> 01:07:03,280
Se konsa nou di ke sa a isit la se 1.

1483
01:07:03,280 --> 01:07:08,110

1484
01:07:08,110 --> 01:07:13,570
Ki sa ki se bagay la ki
natirèlman nan nonm antye relatif pozitif

1485
01:07:13,570 --> 01:07:15,570
ajoute nan ki ba nou 0?

1486
01:07:15,570 --> 01:07:19,150

1487
01:07:19,150 --> 01:07:21,030
E si nou eseye ajoute li nan nonb sa a?

1488
01:07:21,030 --> 01:07:22,830

1489
01:07:22,830 --> 01:07:28,032
Nou pral have-- OK, se konsa kite a ajoute.

1490
01:07:28,032 --> 01:07:32,820

1491
01:07:32,820 --> 01:07:38,065
Nou pral gen 1 plis 1
se 0, ak Lè sa a li pote sou.

1492
01:07:38,065 --> 01:07:40,160

1493
01:07:40,160 --> 01:07:45,490
Lè sa a, nou ap ale nan jwenn 0 ankò.

1494
01:07:45,490 --> 01:07:47,730

1495
01:07:47,730 --> 01:07:48,820
Mwen ap resevwa konfonn.

1496
01:07:48,820 --> 01:07:51,670
Epi ou ap ale nan jwenn 0 ak
0 ak 0 ak 0 ak 0 ak 0.

1497
01:07:51,670 --> 01:07:52,450
Lots of 0 a.

1498
01:07:52,450 --> 01:07:56,240
>> Nan yon sèl nan anpil pase a, nou ap pa
ale nan pral kapab pote li sou,

1499
01:07:56,240 --> 01:07:59,614
paske se pou yo di nou ap sèlman fè fas
ak yon sèl multiple, se konsa sèlman 8 Bits.

1500
01:07:59,614 --> 01:08:02,780
Se konsa, sa òdinatè a fè sa ki pa default
se jis bliye sou sa [fèbl],

1501
01:08:02,780 --> 01:08:03,279
OK?

1502
01:08:03,279 --> 01:08:04,530

1503
01:08:04,530 --> 01:08:06,880
Se konsa, sa a se sa yo rele
konpleman de la.

1504
01:08:06,880 --> 01:08:15,180
Nou tou senpleman defini mwens 1 yo dwe nan
bagay isit la ke si ou ajoute ke nan 1

1505
01:08:15,180 --> 01:08:15,995
ta ba ou 0.

1506
01:08:15,995 --> 01:08:17,609

1507
01:08:17,609 --> 01:08:20,180
Epi sa a, trè fre
paske nou pa fè sa vrèman

1508
01:08:20,180 --> 01:08:24,090
bezwen an reta aplike
yon kalite diferan nan sòm total

1509
01:08:24,090 --> 01:08:26,590
depann sou si ke sa a yon
negatif oswa yon chif pozitif.

1510
01:08:26,590 --> 01:08:27,465
ki fè sans?

1511
01:08:27,465 --> 01:08:28,740

1512
01:08:28,740 --> 01:08:32,370
>> Se konsa, yon sèl bagay ke nou fè
isit la yo nan lòd yo konvèti

1513
01:08:32,370 --> 01:08:38,550
ant yon pozitif ak yon negatif
nonb antye relatif se lè sa a nou baskile tout bagay,

1514
01:08:38,550 --> 01:08:40,930
ak Lè sa a nou ajoute 1 a nimewo sa a.

1515
01:08:40,930 --> 01:08:43,140
Si ou eseye fè li tèt ou
sou yon moso papye,

1516
01:08:43,140 --> 01:08:44,681
w ap ale nan wè ke fè sans.

1517
01:08:44,681 --> 01:08:51,000
Men, si mwen pran nimewo sa a
isit la, sa a se senk.

1518
01:08:51,000 --> 01:08:54,859
Se konsa, si mwen baskile tout bagay
isit la, se konsa 1, 1, 1, 1, 1.

1519
01:08:54,859 --> 01:08:55,880

1520
01:08:55,880 --> 01:08:57,830
Flip, baskile, baskile.

1521
01:08:57,830 --> 01:09:00,130
Lè sa a, mwen ajoute 1 nan li.

1522
01:09:00,130 --> 01:09:02,750
Mwen pral gen egzakteman mwens 5.

1523
01:09:02,750 --> 01:09:03,250
OK?

1524
01:09:03,250 --> 01:09:06,220
>> Sa a jan de fè sans paske si
ou eseye sòm sa a ak nimewo a

1525
01:09:06,220 --> 01:09:10,229
ke nou te gen anvan, ki
was-- kite nan baskile sa a ankò.

1526
01:09:10,229 --> 01:09:12,999
Li te 101 ak anpil 0 a.

1527
01:09:12,999 --> 01:09:13,795

1528
01:09:13,795 --> 01:09:15,670
Si ou eseye ajoute sa
de nonb ansanm,

1529
01:09:15,670 --> 01:09:16,961
w ap ale nan gen egzakteman 0.

1530
01:09:16,961 --> 01:09:18,920

1531
01:09:18,920 --> 01:09:19,460
OK.

1532
01:09:19,460 --> 01:09:19,884
Nenpòt kesyon?

1533
01:09:19,884 --> 01:09:20,759
>> ODYANS: [fèbl]

1534
01:09:20,759 --> 01:09:25,790

1535
01:09:25,790 --> 01:09:27,280
>> GABRIEL: Ki sa ou vle di?

1536
01:09:27,280 --> 01:09:29,240
>> ODYANS: Negatif
pozitif [fèbl].

1537
01:09:29,240 --> 01:09:33,215
>> GABRIEL: Non, ou baskile
epi ou ajoute 1 toujou.

1538
01:09:33,215 --> 01:09:34,081

1539
01:09:34,081 --> 01:09:34,580
Yeah.

1540
01:09:34,580 --> 01:09:36,910

1541
01:09:36,910 --> 01:09:39,680
OK, se konsa karaktè tou kode binèr.

1542
01:09:39,680 --> 01:09:42,649
Nou gen tab ASCII, menm jan ou
te wè tou nan konferans, dwa?

1543
01:09:42,649 --> 01:09:45,040
Se konsa, li fondamantalman yon kat de bagay sa yo.

1544
01:09:45,040 --> 01:09:50,960
Ak isit la mwen pa ka mete aksan sou ase
ke pou yon òdinatè, yon ak 65

1545
01:09:50,960 --> 01:09:52,770
yo literalman menm bagay la.

1546
01:09:52,770 --> 01:10:03,430
Se konsa, si mwen ekri yon bagay tankou Char c
egal yon, mwen te kapab nan menm tan an

1547
01:10:03,430 --> 01:10:06,890
jis ekri isit la 65, epi li
ta dwe ekzakteman menm bagay la, OK?

1548
01:10:06,890 --> 01:10:08,470
Gen nan pa gen diferans tou.

1549
01:10:08,470 --> 01:10:12,420
>> Nou anjeneral gen tandans yo mete
karaktè nan varyab nan kalite.

1550
01:10:12,420 --> 01:10:16,770
Char, pa paske yo ap esansyèlman
fè pou sa, men paske

1551
01:10:16,770 --> 01:10:18,050
nan konvansyon imen.

1552
01:10:18,050 --> 01:10:22,410
Men, ou ka jis fè fas ak nonm antye relatif
olye pou yo varyab nan kalite Char,

1553
01:10:22,410 --> 01:10:23,490
epi ou pral amann.

1554
01:10:23,490 --> 01:10:28,410
Sèl diferans ki genyen vrè
ant yon Char c ak yon m Int

1555
01:10:28,410 --> 01:10:31,960
se ke yon int gen kat bytes nan pifò
sistèm, pandan y ap yon Char gen youn multiple.

1556
01:10:31,960 --> 01:10:33,070

1557
01:10:33,070 --> 01:10:35,460
Yo ap esansyèlman a
menm bagay an tèm de done.

1558
01:10:35,460 --> 01:10:36,990

1559
01:10:36,990 --> 01:10:37,990
Se konsa, sa pral enprime isit la?

1560
01:10:37,990 --> 01:10:43,780
Isit la nou ap enprime yon chif lè l sèvi avèk printf
ak yon plis 1, ak jis tankou nonm antye yo,

1561
01:10:43,780 --> 01:10:46,240
charaktèr ka adisyone, se konsa
karaktè kapab tou gen pou adisyone.

1562
01:10:46,240 --> 01:10:47,890
Se konsa, sa a se egzakteman 65.

1563
01:10:47,890 --> 01:10:49,950
Se konsa, gen nan pral fè
66, ak isit la nou gen

1564
01:10:49,950 --> 01:10:56,860
65 plis ti kras yon mwens gwo A,
ki pral, mwen pa vrèman konnen.

1565
01:10:56,860 --> 01:11:00,900
Men, li pral egzakteman espas sa a
ant lèt yo kapital

1566
01:11:00,900 --> 01:11:07,800
ak ak lèt ​​yo ki pi piti, se konsa
nou ap ale nan jwenn ti yon, dwa?

1567
01:11:07,800 --> 01:11:08,300
Yeah.

1568
01:11:08,300 --> 01:11:11,740
Se konsa, sa a se pral enprime yon
karaktè ki se egzakteman sa a youn.

1569
01:11:11,740 --> 01:11:12,260
Bon?

1570
01:11:12,260 --> 01:11:12,860
Nenpòt kesyon?

1571
01:11:12,860 --> 01:11:16,320

1572
01:11:16,320 --> 01:11:19,430
>> Isit la nou gen yon pakèt moun sou diferan
kalite pou varyab nimerik.

1573
01:11:19,430 --> 01:11:20,620
Nou deja pale sou int.

1574
01:11:20,620 --> 01:11:21,740

1575
01:11:21,740 --> 01:11:27,760
Flote se jis yon fason to-- sa a se reyèlman
komik, paske lè m 'premye te aprann

1576
01:11:27,760 --> 01:11:32,320
nan pwogram li tounen nan jou a ak
Piton, pwogram nan premye fwa mwen tout tan tout tan

1577
01:11:32,320 --> 01:11:37,480
te eseye ekri, mwen te wè ke te gen yon
kalite rele nan ak yon kalite rele flote.

1578
01:11:37,480 --> 01:11:39,800
Epi flote nan te pou tout nimewo reyèl.

1579
01:11:39,800 --> 01:11:43,290
Se konsa, Lè sa a, mwen te mande poukisa yo ta dwe
Mwen janm itilize yon int lè sa a?

1580
01:11:43,290 --> 01:11:45,590
Paske si mwen ka sèvi ak tout
chif reyèl ak yon flote,

1581
01:11:45,590 --> 01:11:47,120
Mwen ta jis sispann lè l sèvi avèk antye, dwa?

1582
01:11:47,120 --> 01:11:49,550
Paske nonm reyèl yo
anpil tankou plis jenerik.

1583
01:11:49,550 --> 01:11:51,820

1584
01:11:51,820 --> 01:11:54,060
>> Li sanble ke sa a se
pa ka a nan òdinatè

1585
01:11:54,060 --> 01:11:58,480
paske yo ap esansyèlman
bagay diferan.

1586
01:11:58,480 --> 01:12:01,470
Se konsa, nonm antye relatif ak cha, nan
operasyon ke ou fè yo

1587
01:12:01,470 --> 01:12:04,739
yo se esansyèlman diferan paske
nan wout la yo ke yo yo estoke, OK?

1588
01:12:04,739 --> 01:12:07,280
Nou pral pale yon ti kras
ti jan pi plis sou sa nan yon dezyèm fwa.

1589
01:12:07,280 --> 01:12:09,110
>> Se konsa, doub se jis yon flote pi gran.

1590
01:12:09,110 --> 01:12:12,830
Anjeneral nan pifò sistèm, yon flote
se kat bytes, jis tankou yon int.

1591
01:12:12,830 --> 01:12:15,440
Epi yon doub se uit bytes.

1592
01:12:15,440 --> 01:12:21,450
Yon lontan lontan se aktyèlman jis yon senbòl
ke ou kole nan yon kalite tankou int.

1593
01:12:21,450 --> 01:12:24,040
Ou di long long Int tankou sa a.

1594
01:12:24,040 --> 01:12:28,550
Long lontan Int x fè li dire pi lontan.

1595
01:12:28,550 --> 01:12:32,310
Se konsa, nan pi sistèm, ki pral ba
uit bytes olye pou yo kat a dabitid.

1596
01:12:32,310 --> 01:12:35,620
Epi ou ka aktyèlman lage nan
nan, se konsa li ka jis di lontan lontan,

1597
01:12:35,620 --> 01:12:37,240
ak ki travay tou, OK?

1598
01:12:37,240 --> 01:12:42,850
Ou kapab tou fè lòt bagay tankou
siye Int, oswa ankò jis siye

1599
01:12:42,850 --> 01:12:43,680
ta travay tou.

1600
01:12:43,680 --> 01:12:49,370
Epi ki ta fè x gen yon varyab
tankou tout bagay a pozitif,

1601
01:12:49,370 --> 01:12:53,231
se konsa ou pa ka vrèman gen negatif
nimewo nan fason ke nou te wè moute isit la.

1602
01:12:53,231 --> 01:12:56,484

1603
01:12:56,484 --> 01:12:58,650
Se konsa, sa yo bèl bagay
pwen k ap flote ak presizyon.

1604
01:12:58,650 --> 01:13:01,890
Sa a youn nan rezon ki poukisa ou
vle sèvi ak antye olye pou yo flote,

1605
01:13:01,890 --> 01:13:04,370
paske antye se 100% egzak, dwa?

1606
01:13:04,370 --> 01:13:06,170
Li nan egzakteman nimewo sa a.

1607
01:13:06,170 --> 01:13:11,910
Pou pwen k ap flote, si ou
di repons egal 1 sou 10--

1608
01:13:11,910 --> 01:13:14,690
Mwen rive gen sa a egzak
pwogram isit la, float.c.

1609
01:13:14,690 --> 01:13:16,390

1610
01:13:16,390 --> 01:13:19,420
Sa simagri a 20 kote desimal.

1611
01:13:19,420 --> 01:13:23,270
1 divize pa 10, e ke
Jeneralman sa yo se 0.1, dwa?

1612
01:13:23,270 --> 01:13:27,910
Men, isit la si nou fè
flote ak Lè sa a nou kouri li,

1613
01:13:27,910 --> 01:13:30,320
nou wè ke li nan pa egzakteman 0.1.

1614
01:13:30,320 --> 01:13:33,570
Li nan 0,149 yon bagay.

1615
01:13:33,570 --> 01:13:35,570
>> Epi poukisa se sa?

1616
01:13:35,570 --> 01:13:40,390
Paske ou pa ka vrèman reprezante chak
sèl nimewo posib reyèl nan memwa

1617
01:13:40,390 --> 01:13:42,730
paske gen
uncountably anpil nan yo.

1618
01:13:42,730 --> 01:13:48,360
Se konsa, nou ap teknikman sèlman kapab
reprezante yon kantite lajan fini nan yo

1619
01:13:48,360 --> 01:13:50,470
ak yon kantite lajan fini nan done.

1620
01:13:50,470 --> 01:13:52,050
Men, li la reyèlman enteresan.

1621
01:13:52,050 --> 01:13:54,920
Koulye a, sa a amèn
kesyon de ki jan ou ta

1622
01:13:54,920 --> 01:13:59,299
ale sou reprezante
sa a ak Bits, dwa?

1623
01:13:59,299 --> 01:14:00,340
Se konsa, kouman yo estoke flote?

1624
01:14:00,340 --> 01:14:01,970

1625
01:14:01,970 --> 01:14:03,730
Avèk nonm antye li te fasil.

1626
01:14:03,730 --> 01:14:06,690
Men, avèk cha ou vle
yo maksimize ranje a,

1627
01:14:06,690 --> 01:14:10,530
epi ou vle pou kapab reprezante
nimewo gwo ak nimewo trè ti tankou

1628
01:14:10,530 --> 01:14:14,210
0.000001 nan menm tan an.

1629
01:14:14,210 --> 01:14:15,180
Se konsa, ankò, se li menm jwèt.

1630
01:14:15,180 --> 01:14:20,470
nenpòt moun ki gen nenpòt lide ki jan nou te kapab
ale sou reprezante flote nan memwa?

1631
01:14:20,470 --> 01:14:26,820

1632
01:14:26,820 --> 01:14:27,970
Jis voye jete anyen.

1633
01:14:27,970 --> 01:14:29,930

1634
01:14:29,930 --> 01:14:30,856
Wi, tanpri.

1635
01:14:30,856 --> 01:14:33,552
>> ODYANS: [fèbl] kòm
si li te de antye ak yon sèl

1636
01:14:33,552 --> 01:14:36,890
ke yo te [fèbl a] ak yon sèl ke yo te
tout bagay apre pwen desimal la.

1637
01:14:36,890 --> 01:14:37,640
GABRIEL: OK, fre.

1638
01:14:37,640 --> 01:14:40,300
Se konsa, de nonm antye relatif diferan.

1639
01:14:40,300 --> 01:14:45,260
Ou ka gen 12.45, se konsa sa a, se 12 ak 45.

1640
01:14:45,260 --> 01:14:45,890
Nice.

1641
01:14:45,890 --> 01:14:46,973
Ki sa ki sispann sèvi zidōl ou pral di?

1642
01:14:46,973 --> 01:14:48,420

1643
01:14:48,420 --> 01:14:49,430
Menm bagay la ki?

1644
01:14:49,430 --> 01:14:49,930
Yeah?

1645
01:14:49,930 --> 01:14:55,630
>> ODYANS: [fèbl] notasyon
kote ou separe baz la.

1646
01:14:55,630 --> 01:14:58,910
>> GABRIEL: notasyon syantifik,
yeah sa a, se anjeneral sa ki rive.

1647
01:14:58,910 --> 01:15:01,350
Se konsa, sa a se sa yo rele mantis la.

1648
01:15:01,350 --> 01:15:06,490
Sa a ki sa se aktyèlman la
nimewo, ak Lè sa a ekspozan an

1649
01:15:06,490 --> 01:15:08,780
se jis ki kote vigil la se, dwa?

1650
01:15:08,780 --> 01:15:13,720
Se konsa, sa a se pral yo dwe yon bagay
nan fòm nan 1, 2, 3, 4, 5 fwa 10

1651
01:15:13,720 --> 01:15:15,000
nan mwens 4 la.

1652
01:15:15,000 --> 01:15:17,800
Mwen jis reyalize that-- yeah, egzakteman.

1653
01:15:17,800 --> 01:15:23,372
Lè sa a, sa a 10 a 4 an mwens se
pral defini ki kote vigil la se, OK?

1654
01:15:23,372 --> 01:15:24,330
Nan Brezil nou itilize vigil.

1655
01:15:24,330 --> 01:15:26,795
Isit la ou nèg sèvi ak yon dot.

1656
01:15:26,795 --> 01:15:27,640
Se konsa, yon dot.

1657
01:15:27,640 --> 01:15:28,860

1658
01:15:28,860 --> 01:15:34,840
>> Lè sa a se fre, paske lè sa a ou kapab
konsantre anpil nan Bits ou sou sa a Guy

1659
01:15:34,840 --> 01:15:40,863
isit la, sou mantis a, ak Lè sa a, sa a, se
pral fè presizyon aktyèl ou yo.

1660
01:15:40,863 --> 01:15:41,920

1661
01:15:41,920 --> 01:15:47,175
Epi ou ka fè sa swa nan desimal
oswa nan sistèm nan ki baze binè.

1662
01:15:47,175 --> 01:15:49,781
Gen diferan
fason yo aplike sa a.

1663
01:15:49,781 --> 01:15:50,280
Kesyon?

1664
01:15:50,280 --> 01:15:55,918

1665
01:15:55,918 --> 01:15:56,418
Wi?

1666
01:15:56,418 --> 01:15:57,508

1667
01:15:57,508 --> 01:15:59,841
ODYANS: Ki jan anpil kote
apre desimal a [fèbl]?

1668
01:15:59,841 --> 01:16:05,240

1669
01:16:05,240 --> 01:16:12,610
>> GABRIEL: Sa a yon kesyon konplike,
paske li nan pa janm reyèlman 100% egzak,

1670
01:16:12,610 --> 01:16:15,680
paske kòm ou wè la a, pou
kèk nimewo li se 100% presi.

1671
01:16:15,680 --> 01:16:20,350
Mwen kwè si nou mete 0.5 isit la,
li nan pral fè 100% presi.

1672
01:16:20,350 --> 01:16:22,220
Li nan pral fè 0,500000.

1673
01:16:22,220 --> 01:16:24,170
Se konsa, nan ka sa a, li la pafè.

1674
01:16:24,170 --> 01:16:27,330
Men, nan lòt ka yo,
li nan anpil mwens pafè.

1675
01:16:27,330 --> 01:16:35,010
Nan eksperyans mwen, tankou jiska kat,
senk kote desimal se trè presi.

1676
01:16:35,010 --> 01:16:38,300
Si ou itilize yon doub, li pral
gen fason plis egzak pase sa, OK?

1677
01:16:38,300 --> 01:16:42,750
>> ROB BOWDEN: Se konsa, jis voye jete
kèk kontèks plis nan flote,

1678
01:16:42,750 --> 01:16:46,320
Mwen pa janm sonje 100% la ki jan
espèk ki te gen cha aktyèlman ap travay,

1679
01:16:46,320 --> 01:16:52,660
men mwen fè ou toujou sonje
ki flote kòmanse resevwa sal.

1680
01:16:52,660 --> 01:16:55,460

1681
01:16:55,460 --> 01:17:00,930
Se konsa, lide a se ke lè ou jwenn reyèlman,
reyèlman nimewo gwo oswa reyèlman, reyèlman

1682
01:17:00,930 --> 01:17:03,470
nimewo ti, nou kòmanse
vin pi mal ak pi mal

1683
01:17:03,470 --> 01:17:05,860
nan différencier
ant de cha fèmen.

1684
01:17:05,860 --> 01:17:09,180
>> Se konsa, kouman mwen renmen yo reflechi sou se
ak k ap flote enpresizyon pwen,

1685
01:17:09,180 --> 01:17:11,890
ki te gen de cha ki
si mwen eseye presize yo

1686
01:17:11,890 --> 01:17:15,150
nan C, malgre lefèt ke
yo ap nimewo diferan,

1687
01:17:15,150 --> 01:17:17,340
yo pwal santi yo gen
entèprete kòm nimewo a menm,

1688
01:17:17,340 --> 01:17:19,006
paske nou pa kapab sere yo yon lòt jan.

1689
01:17:19,006 --> 01:17:20,540
Nou bezwen sèvi ak Bits yo menm.

1690
01:17:20,540 --> 01:17:23,220
Se konsa, lè nou jwenn nan
reyèlman, reyèlman nimewo gwo,

1691
01:17:23,220 --> 01:17:28,460
pale tankou 10 a 300 la oswa
yon bagay, li nan nan pwen sa a

1692
01:17:28,460 --> 01:17:33,240
ke 10 a 300 oswa nan
5 fwa 10 a 300 la

1693
01:17:33,240 --> 01:17:37,020
pa ka différenciés
soti nan 7 fwa 10 a 300 nan.

1694
01:17:37,020 --> 01:17:39,660
Se konsa, sa a, se yon bèl gwo diferans
ant de chif yo.

1695
01:17:39,660 --> 01:17:43,830
>> Men, Lè sa lè ou jwenn desann
nan seri nòmal bagay sa yo,

1696
01:17:43,830 --> 01:17:45,770
ou gen tandans yo dwe trè
bon nan différencier.

1697
01:17:45,770 --> 01:17:49,020
Lè sa a, lè ou jwenn desann reyèlman piti,
w ap tou ap resevwa trè move ankò.

1698
01:17:49,020 --> 01:17:52,529
Se konsa, tankou yon pakèt antye nan
0,0000, li vin trè move.

1699
01:17:52,529 --> 01:17:53,820
GABRIEL: Yeah, se konsa yon nòt rapid.

1700
01:17:53,820 --> 01:17:54,670
Pa janm fè sa.

1701
01:17:54,670 --> 01:17:57,590
Pa janm eseye konpare
flote lè l sèvi avèk egal egal,

1702
01:17:57,590 --> 01:18:02,800
paske menm si yo ap prèske la
menm, prèske menm bagay la se pa menm bagay la.

1703
01:18:02,800 --> 01:18:06,360
Se konsa, sa anjeneral ou fè se ou fè soustraksyon
yo, pran valè a absoli nan sa,

1704
01:18:06,360 --> 01:18:12,380
ak wè si sa a, se pi piti pase
0.0001 oswa yon bagay tankou sa yo, OK?

1705
01:18:12,380 --> 01:18:12,880
Ak fre.

1706
01:18:12,880 --> 01:18:16,630
Mwen konnen yon anpil nan moun ki gen
kèk background nan Java,

1707
01:18:16,630 --> 01:18:19,700
espesyalman sa yo ki moun ki fè
Syans òdinatè AP, dwa?

1708
01:18:19,700 --> 01:18:23,630
Ak Java se yon lang
ki sitou ki baze sou C,

1709
01:18:23,630 --> 01:18:26,570
li gen yon koup diferans trè gwo.

1710
01:18:26,570 --> 01:18:31,430
Men, pou pasan, ak ifs, ak lòt bagay tankou
ki, yo ap tout menm bagay sentaks la.

1711
01:18:31,430 --> 01:18:35,240
Mwen gen yon pwogram kèk isit la yo montre sa a.

1712
01:18:35,240 --> 01:18:37,050
>> Se konsa, pou egzanp, yon mond alo senp.

1713
01:18:37,050 --> 01:18:43,140

1714
01:18:43,140 --> 01:18:46,600
Sa a se alo mond nan C, kote ou
mesye yo definitivman abitye avèk,

1715
01:18:46,600 --> 01:18:49,100
ak sa a ak sa a se yon sèl nan Java.

1716
01:18:49,100 --> 01:18:53,100
Se konsa, nan Java nou gen sa a
klas piblik, alo mond,

1717
01:18:53,100 --> 01:18:57,050
epi revoke estatik piblik
prensipal yo, ak fisèl arg.

1718
01:18:57,050 --> 01:18:59,665
Arg yo fisèl yo ale
a parèt nan C trè yon ti tan.

1719
01:18:59,665 --> 01:19:00,740

1720
01:19:00,740 --> 01:19:01,990
Men, kite a pa ale la ankò.

1721
01:19:01,990 --> 01:19:06,060
Kounye a, nou gen anile isit la, ki vle di
ke prensipal se pa sa pran nenpòt agiman.

1722
01:19:06,060 --> 01:19:09,220
Lè sa a, nou gen
System.out.println, nan la e ke

1723
01:19:09,220 --> 01:19:11,140
kalite ekivalan a pou printf.

1724
01:19:11,140 --> 01:19:17,150
Isit la nou pa reyèlman bezwen antislach a
n paske ekri ak lèt ​​detache ln fè sa pou ou.

1725
01:19:17,150 --> 01:19:19,680
Li jwen antislach a
n nan fen liy.

1726
01:19:19,680 --> 01:19:22,540

1727
01:19:22,540 --> 01:19:30,415
>> Men, si ou ale nan
yon bagay tankou yon pou, ou

1728
01:19:30,415 --> 01:19:32,590
ka wè ke yo ap
bèl anpil menm bagay la.

1729
01:19:32,590 --> 01:19:37,390
Se konsa, inisyalizasyon, ak nan
kondisyon, ak aktyalizasyon a

1730
01:19:37,390 --> 01:19:42,050
is-- mwen rate yon espas isit lan-- yo ap
bèl anpil menm bagay la, eksepte Java

1731
01:19:42,050 --> 01:19:44,430
te gen kòm yon tijan plis bagay wo nivo.

1732
01:19:44,430 --> 01:19:46,010

1733
01:19:46,010 --> 01:19:49,610
Isit la nou kapab fè plis Mwen menm ak
Java pral otomatikman

1734
01:19:49,610 --> 01:19:52,730
fè sa-a mwen isit la, ki se
yon nonb antye relatif, nan yon fisèl,

1735
01:19:52,730 --> 01:19:55,200
ak Lè sa a kole nan
de strings yo ansanm.

1736
01:19:55,200 --> 01:19:57,570
Isit la nan C nou bezwen fè & d% an.

1737
01:19:57,570 --> 01:20:15,310

1738
01:20:15,310 --> 01:20:18,170
Liy lan nan isit la, pou
sanble egzakteman menm bagay la.

1739
01:20:18,170 --> 01:20:37,760
>> Men, si nou gade nan si, ifs yo
tou gade egzakteman menm bagay la tou, dwa?

1740
01:20:37,760 --> 01:20:39,290

1741
01:20:39,290 --> 01:20:44,650
Se konsa, diferans ki genyen reyèl gwo yo
nan bagay sa yo ke ou wè isit la.

1742
01:20:44,650 --> 01:20:47,530
Piblik estatik, anile, ak
Lè sa a, klas piblik si.

1743
01:20:47,530 --> 01:20:48,990

1744
01:20:48,990 --> 01:20:52,360
Se konsa, Java gen sa ki
rele yon machin vityèl.

1745
01:20:52,360 --> 01:20:53,560

1746
01:20:53,560 --> 01:21:00,150
Epi li se trè lou ki baze sou sa
yo rele pwogram objè oryante,

1747
01:21:00,150 --> 01:21:04,120
ki se yon trè, trè komen
paradigm pou pwogram sèjousi.

1748
01:21:04,120 --> 01:21:10,870
Epi bagay klas sa a se sa ou wè,
yon bagay nan men Oryantasyon objè,

1749
01:21:10,870 --> 01:21:14,214
se ou kreye yon klas ak lè sa a ou
ka dériver objè soti nan ki klas la.

1750
01:21:14,214 --> 01:21:16,380
Nou pa ap ale nan pale twò
anpil sou ke nan CS50,

1751
01:21:16,380 --> 01:21:18,213
men sa a definitivman
yon bagay vrèman fre,

1752
01:21:18,213 --> 01:21:21,440
espesyalman si w vle ale nan
devlopman web pi plis sofistike

1753
01:21:21,440 --> 01:21:24,050
nan fen kou a,
tankou soumèt pwojè final ou a

1754
01:21:24,050 --> 01:21:26,430
ak kèk bèl cadres ak lòt bagay.

1755
01:21:26,430 --> 01:21:31,250
>> Se konsa, fondamantalman lide a se ke ou
pa vle re-aplike yon bagay,

1756
01:21:31,250 --> 01:21:36,330
se konsa ou kreye yon bagay sa a, se
trè jenerik, tankou fòm nan,

1757
01:21:36,330 --> 01:21:38,310
ak Lè sa a ou kreye
fòm diferan soti nan li,

1758
01:21:38,310 --> 01:21:40,240
ak Lè sa a soti nan chak nan
fòm sa yo, ou kreye

1759
01:21:40,240 --> 01:21:45,110
kèk fòm plis espesifik nan twa
dimansyon oswa yon bagay tankou sa.

1760
01:21:45,110 --> 01:21:48,799
Apre sa, yo gen sa a yerachi yo
eritye nan men yo menm ki lòt, se konsa

1761
01:21:48,799 --> 01:21:51,840
tout fonksyon ak tout varyab ki
fòm nan gwo isit la gen, tout moun sa yo

1762
01:21:51,840 --> 01:21:54,110
yo ale nan gen, ak tout sa yo se
ale nan gen, ak sou sa ak pou fè.

1763
01:21:54,110 --> 01:21:55,640
Se konsa, sa a, se lide a de baz yo.

1764
01:21:55,640 --> 01:21:59,170
>> C pa gen sa, men C ++
gen ki kalite karakteristik.

1765
01:21:59,170 --> 01:22:02,710
Ak Java se lou enfliyanse
pa Oryantasyon objè,

1766
01:22:02,710 --> 01:22:05,310
se konsa Se poutèt sa ou wè
klas isit la tout tan tout tan an.

1767
01:22:05,310 --> 01:22:10,790
Epi bagay la lòt se
sa a Java machin vityèl.

1768
01:22:10,790 --> 01:22:13,790
Se konsa, sa, mwen panse, se yon lide trè entelijan.

1769
01:22:13,790 --> 01:22:17,020
Se konsa, sa jan yo ki
envante java te fè se

1770
01:22:17,020 --> 01:22:19,630
yo pa t 'vle
konpile kòd yo de fwa

1771
01:22:19,630 --> 01:22:23,990
si yo te gen nan kouri li nan yon Windows,
oswa yon Mac, oswa Linux, se konsa sa yo fè

1772
01:22:23,990 --> 01:22:26,740
se yo literalman kouri
yon bagay tankou aparèy la,

1773
01:22:26,740 --> 01:22:29,630
men ou pa reyèlman wè li pase.

1774
01:22:29,630 --> 01:22:32,430
Se konsa, yo kouri nan yon machin vityèl
andedan nan òdinatè w lan, ki

1775
01:22:32,430 --> 01:22:34,940
se fondamantalman tankou yon
mini sistèm opere.

1776
01:22:34,940 --> 01:22:37,920
Epi sa opere
objektif sistèm lan nan lavi

1777
01:22:37,920 --> 01:22:41,430
se jis nan kouri sa yo rele Kòd multiple.

1778
01:22:41,430 --> 01:22:47,411
>> Se konsa, olye pou yo nan C, wout la nou ta
konpile sa a se fè si, ak Lè sa a kouri

1779
01:22:47,411 --> 01:22:47,910
./if.

1780
01:22:47,910 --> 01:22:53,510

1781
01:22:53,510 --> 01:22:55,290
Mwen bliye antislach a nan.

1782
01:22:55,290 --> 01:23:00,240
Nan Java, ou ta fè premye
Java C rive nan konpile li, if.c.

1783
01:23:00,240 --> 01:23:06,440

1784
01:23:06,440 --> 01:23:08,252
Li pa C. Li nan dot java.

1785
01:23:08,252 --> 01:23:09,460

1786
01:23:09,460 --> 01:23:12,140
Lè sa a, ou gen kouri pa ./.

1787
01:23:12,140 --> 01:23:15,440
Ou jwenn dosye nouvo sa a
if.class, men ou pa ka vrèman

1788
01:23:15,440 --> 01:23:17,980
kouri if.class kounye a jis
tankou nou te fè anvan.

1789
01:23:17,980 --> 01:23:19,440
Sa a se pa yon ègzèkutabl.

1790
01:23:19,440 --> 01:23:20,630
Ou gen nan kouri.

1791
01:23:20,630 --> 01:23:23,410
Ou gen manje l 'nan
yon pwogram ki rele Java,

1792
01:23:23,410 --> 01:23:28,260
e ke pwogram se machin nan vityèl,
ak Lè sa a ou fè if.class, oswa si.

1793
01:23:28,260 --> 01:23:28,760
Wi.

1794
01:23:28,760 --> 01:23:30,890
Lè sa a, li travay.

1795
01:23:30,890 --> 01:23:33,740
OK kidonk sa a se kalite a
machin vityèl ap pase.

1796
01:23:33,740 --> 01:23:37,700
C pa gen sa, Se konsa, si m 'te
mete pwogram sa a nan yon machin Windows,

1797
01:23:37,700 --> 01:23:40,516
li pa ta travay nan C. Nan Java li fè sa.

1798
01:23:40,516 --> 01:23:41,015
Kesyon?

1799
01:23:41,015 --> 01:23:43,430

1800
01:23:43,430 --> 01:23:44,030
Fre.

1801
01:23:44,030 --> 01:23:47,160
Sa a si pou super seksyon pou jodi a.

1802
01:23:47,160 --> 01:23:49,462