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>> SAM GREEN: Hi, kulħadd.

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Merħba għall seminar tagħna.

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Jisimni Sam.

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HUGH ZABRISKIE: Ninsab Hugh.

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SAM GREEN: U aħna qed tmur biex jitkellmu llum
dwar JavaScript u l-API Web Audio.

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Just biex tibda, dan huwa deskrizzjoni
tal-aġenda tagħna għall-seminar.

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Aħna ser tibda billi jitkellem dwar
għalfejn inti għandek tkun interessati fil-Web

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00:00:25,350 --> 00:00:30,130
API awdjo, għaliex hija JavaScript
il-lingwa li għandek bżonn għal dan,

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u mbagħad jitkellmu dwar JavaScript
essentials-- hekk simili,

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jimxu miegħek permezz ta 'xi
baŜi tal-lingwa,

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u mbagħad jitkellmu dwar il-
API awdjo fuq livell għoli.

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Imbagħad, Hugh se jitkellmu dwar xi wħud
mill-istadji tal-produzzjoni awdjo

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u mbagħad demo dan sequencer biża
proġett huwa mibni u jurik l-kodiċi.

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U allura, aħna ser ikollhom ħin biex
mistoqsijiet fl-aħħar għall-persuni

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li huma hawn jgħixu.

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>> HUGH ZABRISKIE: Kessaħ.

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>> SAM GREEN: Kessaħ.

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>> HUGH ZABRISKIE: Kessaħ.

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I se back up.

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>> SAM GREEN: Allura, l-ewwel affarijiet ewwel.

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Allura wieħed mill-affarijiet kbar
dwar il-Web Audio API

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hija li hemm l-ebda twaqqif meħtieġa.

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Jidħol mibnija fil lill
browsers aktar moderni,

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inklużi Chrome, Xifer, kollu kemm hu
mazz ta others-- 'dawk kollha

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00:01:08,630 --> 00:01:12,650
porzjonijiet li kbar ta '
nies qed jużaw illum.

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Hekk hemm ebda stabbilit,
apparti minn ftit jkollna

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a web server għaddejjin, għal
inti biex tibda taħdem

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fuq il-proġett tiegħek, li huwa kbir.

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>> Nirrakkomandaw pretty
ħafna li inti tqis

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użu Chrome għall
JavaScript web iżvilupp,

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biss minħabba iżviluppatur tagħha
għodod huma verament b'saħħtu.

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Bħala eżempju ta 'ftit dak li jfisser
billi qal jiftħu tiegħek JavaScript

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console-- jekk inti tmur fis Chrome
u inti tħares lejn xi paġna tal-web,

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u inti xellug ikklikkja
Spezzjona Element, u mbagħad

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inti tmur għal dan ftit drop-down
dritt hawn u tikklikkja fuq Console,

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tkun taf tara dak li jiftaħ jistenna
ħafna bħal kmand pront li inti

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tista 'tara fuq Mac tiegħek, jew fuq il-ID.

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U biss bħal dik, nistgħu
tip jikkmanda hawn, bħal ċari,

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u jikkmanda oħra bħal dik.

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Nistgħu noħolqu varjabbli, kif
Ser naraw aktar tard fl JavaScript.

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U hekk xi ħaġa li nistgħu nagħmlu fil
JavaScript, nistgħu nagħmlu mal-console,

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u li l-mod super handy biex
tibda playing madwar mal APIs

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u jkollna komdu ma
JavaScript dritt barra l-BAT.

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Ebda sett up meħtieġ,
li huwa tassew sbieħ.

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Kessaħ.

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Tal-biża.

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>> Hekk biss ħaġa waħda aktar li jżid.

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Jekk għandek xi questions-- hemm
ħafna minnkom li ma jkunux hawn jgħixu,

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tħossok liberu li email us-- dawn
huma indirizzi email tagħna.

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Jekk għandek xi mistoqsijiet
inti ma tridx li jitlob minna,

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bħal, oh I jkollhom bug
fil-kodiċi tiegħi, jew xi ħaġa

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li l-ftit aktar speċifiku,
forsi Google ewwel.

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Hemm ħafna ta 'riżorsi kbira
dwar il-Web Audio API hemmhekk.

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Huwa verament tajjeb
dokumentati u huwa qed

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użati minn ton ta 'nies fil
industrija, u nies li huma biss

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bini Jittieħed gost għalihom infushom.

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Għalhekk għandu jkun hemm ħafna
tar-riżorsi hemmhekk.

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Tal-biża.

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>> Kessaħ, hekk għaliex il-Web Audio API?

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Din id-dijagramma huwa ftit
ta 'evoluzzjoni tal-mod

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ħoss fuq il-web kibret matul iż-żmien.

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Bgsound kien simili l-tikketta HTML oriġinali
li Internet Explorer tintuża biex tappoġġja.

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Hija permessa biss għal ħsejjes pretty bażiċi,
l-funzjonalità ma kienx robust ħafna,

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u inti ma setgħux jagħmlu
sekwenzar ikkumplikata,

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jew kontroll meta ħoss beda
u waqaf robust ħafna.

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Allura, ma kienx partikolarment
żviluppat sew.

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Imbagħad wara li, Flash
daħal along-- li,

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Jien ċert li inti guys huma kollha familjari
ma Flash-- forsi mhux kif taħdem,

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imma inti stajt ċertament jaraha.

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You ħadthom ltqajna biex taġġorna Flash tiegħek
Plug-in, dak kollu li tip ta 'għalf,

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u li ċertament estendiet il-firxa
ta 'funzjonalità li kien disponibbli.

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Iżda t-teħid tal-utent jinstallaw
plug-in hija definittivament

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żvantaġġ għall-inklużjoni tal Flash
fl-applikazzjoni tiegħek, id-dritt?

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Għaliex imbagħad int dipendenti fuq il-
utent għaddejjin u jsibu dan plug-in,

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u probabbilment qed jiġu ttrasformati
off minn dan il-pass addizzjonali

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huma għandhom jieħdu biex jużaw app tiegħek.

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U mbagħad jista 'jkun hemm aġġornament
li ser break-applikazzjoni tiegħek kollu,

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u dan jispiċċa jkun ħmarillejl
għall-iżviluppatur, wisq.

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Allura li kien Barricade.

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>> U mbagħad wara li daħlet tul,
il-lametta awdjo HTML, li

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hija karatteristika ta HTML-- aktar moderna li
ċertament permess għal ħafna aktar Jittieħed,

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iżda anki l-affarijiet li inti tista 'tagħmel
kien hemm ftit limitata biss

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bħala riżultat ta 'l-affarijiet
li HTML kien kapaċi.

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Allura meta l-JavaScript
API, il-Web Audio API,

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sar standard
prattika madwar browsers,

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li verament mwessa s-sett
ta 'opportunitajiet għall-iżviluppaturi

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li verament jsibu rwieħhom bini
Jittieħed jibred għall-web.

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Għal żmien twil kien hemm
kien għodda verament robusti

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għall-applikazzjonijiet awdjo nattivi,
like-- kulħadd jaf GarageBand,

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u allura ovvjament hemm aktar
professjonali awdjo taħlit applikazzjonijiet,

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u dak it-tip ta 'għalf.

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Iżda ma kienx hemm
Cloud-- verament tajba mhux

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Cloud, yeah, I raden
Pjattaforma fuq l-internet Cloud--

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li tippermetti lill-iżviluppaturi biex
jibnu l-applikazzjonijiet għal nies

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tagħmel taħlit awdjo.

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U kif hu ser nuruk
aktar tard, il-Web Audio API

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jippermetti verament b'saħħtu
Jittieħed jiġri verament sempliċi,

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li huwa pjuttost jibred.

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Allura dak l-istruzzjoni li għaliex inti
għandhom jaraw il-bqija tas-seminar,

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bażikament.

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>> U issa, jien ser jitkellmu dwar
xi JavaScript-- elementi biss bażiċi

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tal-lingwa, b'tali mod li
nistgħu nkunu fuq l-istess paġna

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meta nitkellmu dwar l-
API ftit aktar tard.

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Kessaħ.

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>> Allura, dan huwa sommarju.

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I nesa dan kien hawn.

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Yeah.

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>> HUGH ZABRISKIE: Hemm żewġ slides hawn.

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>> SAM GREEN: Dan huwa sommarju
ta 'xi wħud mil-limitazzjonijiet

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mill-, metodi oħra li jorbtu qodma.

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U allura issa, għandna dawn l-affarijiet.

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Kessaħ.

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Tal-biża.

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>> Allura, JavaScript essenzjali.

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L-ewwelnett, hemm
differenza pretty sinifikanti

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fl JavaScript versus fil-
lingwa bħal C, bil-metodu

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li varjabbli huma maħluqa.

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Għalhekk fl C, aħna qed jintużaw biex wara
tip varjabbli tagħna, id-dritt?

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U jien ma jfissirx tip bħal
tip fi, I tfisser tip

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bħal jassenjawhom tifsira type--
bħal, l int, float, char.

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Fl C, konna verament użati biex
jkollhom joħolqu varjabbli

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u mbagħad stick għal dak it-tip għall-
ħin kollu li nużaw dak il-varjabbli.

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U li mhix neċessarjament agħar,
iżda huwa probabbilment aktar diffiċli għall-użu.

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Waħda mill-karatteristiċi jibred
tal JavaScript huwa

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li varjabbli dak li sejjaħ
"dinamiku ittajpjat," li

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ifisser li I tista 'toħloq
varjabbli li sintassi,

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varX ugwali 5, per eżempju.

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Li toħloq oriġinarjament
integer variable--

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dritt taħtha l-
hood somewhere-- imma I

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jistgħux jibdlu din varjabbli
li jirreferu għal string

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mingħajr ma jsir xi ħaġa bħal
ħolqien ta 'varjabbli ġdida.

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I m'għandhomx bżonn ninkwetaw
dwar il-bidla tat-tip.

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JavaScript jaf li l--tip
nbidlu, u li jiġri dinamiku.

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>> Allura, hemm benefiċċji
u żvantaġġi għal dan,

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kif xi ħadd li ħadem fil
JavaScript għal waqt tista 'know.

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Hemm drabi meta
inti tista 'aċċidentalment

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tibdel it-tip ta 'varjabbli u
mhux jimmaniġġaw li t-tibdil tip,

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u mbagħad tiegħek JavaScript
tista crash-- jew eċċezzjoni

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jiġu mitfugħa, għaliex inti ser ikollok l-
tip żbaljata meta inti tistenna tip wieħed.

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Kessaħ.

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>> Allura, scoping-- li huwa simili, jekk aħna
tiftakar l-ewwel ġimgħat fil-kors,

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tirreferi għal kif viżibbli varjabbli
huwa u f'liema qasam tal-kodiċi.

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Kollha ta 'li jistenna simili ħafna
għall-mod kif jidher fil C.

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Allura varjabbli huma scoped ġeneralment
fi ħdan braces kaboċċi fi ħdan funzjoni,

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u allura hemm ukoll
varjabbli globalment scoped li

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are-- jekk tikteb varjabbli
barra ta 'funzjoni,

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se jkun viżibbli fit-test kollu.

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>> Wieħed differenza bejn
JavaScript u C b'mod partikolari,

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hija li jekk inti tiddikjara globali
kullimkien varjabbli fil-fajl test

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huwa viżibbli fi kwalunkwe funzjoni
fi ħdan dan il-fajl test.

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Li korretta, id-dritt?

155
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>> HUGH ZABRISKIE: Yep.

156
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>> SAM GREEN: Allura dak ukoll ftit
bit funky meta mqabbla mal C,

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fejn aħna dejjem kellhom ikollhom tagħna
definizzjonijiet varjabbli fuq mill-postijiet

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dawn kienu użati.

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Li mhux regola li l-infurzata
aktar, hekk, xi ftit differenti.

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U għal darb'oħra biss biex reemphasize,
globali kontra variables-- lokali

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simili ħafna għal C. Jista 'jkollok
żewġ varjabbli bl-istess isem,

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u jkollhom waħda mill isimhom shadowed
minn varjabbli lokali jekk wieħed minnhom

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kien globali.

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Tip Allura, simili ta '
problemi li xi wħud minnkom

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jista 'jkollhom run fis f'xi
tal-problema tiegħek settijiet s'issa.

166
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Kessaħ, b'tali mod li fatturi varjabbli.

167
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>> Fluss Kontroll, li jfisser simili,
jekk-else-- stuff-- loġiku u loops.

168
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Allura biex tibda, dan huwa dak li jekk inkella-
dikjarazzjonijiet look like fil JavaScript.

169
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It-tqegħid mill-affarijiet varji
dwar il-linji mhix importanti.

170
00:08:29,750 --> 00:08:34,409
Dan huwa biss wieħed mill-konvenzjonijiet
għall-mod kif kodiċi istruttura aħna.

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Eżatt bħal fil-C, għandna
"jekk," dikjarazzjoni parentesi.

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Li mhux dak I fisser li tagħmel.

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I ma kien għal darb'oħra.

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>> HUGH ZABRISKIE: Jippruvaw ħruġ?

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SAM GREEN: Le, jien
biss tipprova li zoom.

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Ma jimpurtax.

179
00:08:50,660 --> 00:08:54,730

180
00:08:54,730 --> 00:08:59,370
>> Allura, għandna "jekk" id-dikjarazzjoni u
għandna kundizzjoni ġewwa ta 'dan

181
00:08:59,370 --> 00:09:03,130
li jevalwa sa vera jew falza,
u li jiddetermina jekk jew le

182
00:09:03,130 --> 00:09:04,510
aħna jidħol li blokk ta 'kodiċi.

183
00:09:04,510 --> 00:09:09,860
U bl-istess mod, għandna inkella 'jekk, u
l oħra, bħad aħna qed użati fl C.

184
00:09:09,860 --> 00:09:14,010
>> Inti wkoll tkun pjuttost komda
dritt barra l-BAT ma 'linji,

185
00:09:14,010 --> 00:09:16,440
għaliex huma wkoll tħares
ħafna bħall C jistenna.

186
00:09:16,440 --> 00:09:19,600
Imma inti ser ikollok avviż mill-ġdid li aħna
jkollhom, minflok int initializations,

187
00:09:19,600 --> 00:09:22,570
għandna initializations var.

188
00:09:22,570 --> 00:09:24,650
UI raden inti għandek
joqgħod attent li jagħmlu

189
00:09:24,650 --> 00:09:28,460
żgur li int ma jbiddlux il-valur
ta I minn int biex string,

190
00:09:28,460 --> 00:09:31,780
per eżempju, minħabba li għaddej biex
jikkawża imġieba stramb inti ma tista

191
00:09:31,780 --> 00:09:32,280
jistennew.

192
00:09:32,280 --> 00:09:35,750
Iżda dan għandu jagħti ħarsa
pretty familjari, kif ukoll.

193
00:09:35,750 --> 00:09:39,460
>> Allura dan huwa fejn affarijiet jibdew
jiksbu xi ftit crazy fil JavaScript

194
00:09:39,460 --> 00:09:44,920
għal xi ħadd li huwa għaddej minn
isfond ta 'C. Hemm funzjonijiet

195
00:09:44,920 --> 00:09:48,070
fl JavaScript, u ​​hemm mod wieħed
li tiddikjara funzjoni li jistenna

196
00:09:48,070 --> 00:09:50,361
tip ta 'simili għal C, u
allura hemm ieħor li

197
00:09:50,361 --> 00:09:52,450
jistenna tip ta 'differenti.

198
00:09:52,450 --> 00:09:54,930
>> L-ewwel verżjoni,
li nistgħu naraw hawn,

199
00:09:54,930 --> 00:09:59,260
huwa tip ta 'C-like, fejn
ngħidu, dan huwa funzjoni,

200
00:09:59,260 --> 00:10:01,490
tagħtiha isem, jagħtu
in-numru ta 'argumenti,

201
00:10:01,490 --> 00:10:05,150
U allura l-kontenut tal-funzjoni
mur ġewwa dawk ċineg kaboċċi.

202
00:10:05,150 --> 00:10:08,850
Ser naraw eżempju ta
argumenti ftit tieni.

203
00:10:08,850 --> 00:10:13,420
>> Billi fuq il-linja li jmiss, naraw, oh,
Heres varjabbli imsejjaħ "myFunction,"

204
00:10:13,420 --> 00:10:17,546
u aħna ugwali għal dan ir
function-- thing-- ġeneriċi li

205
00:10:17,546 --> 00:10:19,170
ma jidhirx li jkollhom xejn għaddej.

206
00:10:19,170 --> 00:10:22,780

207
00:10:22,780 --> 00:10:26,080
Ir-raġuni li l differenti
minn C hija li JavaScript

208
00:10:26,080 --> 00:10:30,040
huwa dak li sejjaħ lingwa funzjonali,
jew ikollu elementi funzjonali, li jfisser

209
00:10:30,040 --> 00:10:33,510
li l-funzjonijiet huma attwalment valuri.

210
00:10:33,510 --> 00:10:39,520
U dan ifisser li nistgħu stabbilit
varjabbli biex ikunu ugwali għal funzjoni

211
00:10:39,520 --> 00:10:43,210
u mbagħad jimxu dik il-funzjoni
madwar, jgħaddu bħala argument,

212
00:10:43,210 --> 00:10:46,550
jagħmlu kull tip ta 'għalf
bħal dik ma 'funzjonijiet.

213
00:10:46,550 --> 00:10:49,682
>> Ħaġa waħda oħra li note--
funzjonijiet huma miktuba

214
00:10:49,682 --> 00:10:51,140
ma 'ċertu numru ta' argumenti.

215
00:10:51,140 --> 00:10:54,056
Ser naraw eżempju ta 'funzjoni
ma 'argument fuq il-pjastra jmiss.

216
00:10:54,056 --> 00:10:56,720
Iżda JavaScript mhux se
Yell fi inti jekk inti tipprova

217
00:10:56,720 --> 00:10:59,330
għall-użu funzjoni mal-
numru ħażin ta 'argumenti.

218
00:10:59,330 --> 00:11:05,310
Hija ser biss tagħmel ħilitha biex tagħmel
do, li jfisser li jekk inti tgħaddi,

219
00:11:05,310 --> 00:11:09,410
inti sejħa funzjoni li tistenna
argument bl-ebda argument, dak kollu li

220
00:11:09,410 --> 00:11:13,990
se jiġri huwa li ser tagħmel mill-aħjar
li tipprova tesegwixxi dan il-kodiċi,

221
00:11:13,990 --> 00:11:16,541
u jekk eventwalment tmur
fi eċċezzjoni jew żball,

222
00:11:16,541 --> 00:11:19,790
dan ser tarmi din l-eċċezzjoni u biss iżommu
going-- li huwa biss wieħed mill-modi

223
00:11:19,790 --> 00:11:21,070
li JavaScript jaħdem.

224
00:11:21,070 --> 00:11:21,781
Yeah.

225
00:11:21,781 --> 00:11:24,207
>> UDJENZA: X'jiġri jekk
hemm wisq argumenti?

226
00:11:24,207 --> 00:11:26,040
SAM GREEN: Allura l-
kwistjoni kienet, dak li jiġri

227
00:11:26,040 --> 00:11:27,380
jekk ikun hemm wisq argumenti?

228
00:11:27,380 --> 00:11:29,171
U t-tweġiba hija li
JavaScript se biss

229
00:11:29,171 --> 00:11:32,120
jinjora dawk li huma
wara dawk li qed tistenna.

230
00:11:32,120 --> 00:11:36,420
Hija ser jippruvaw biex tesegwixxi l-funzjoni
sejħa bħallikieku kien biss l-ewwel tnejn.

231
00:11:36,420 --> 00:11:37,075
Dritt?

232
00:11:37,075 --> 00:11:37,700
>> HUGH ZABRISKIE: Dak id-dritt, yeah.

233
00:11:37,700 --> 00:11:39,449
Bl-istess mod, jekk hemm
huma ftit wisq argumenti,

234
00:11:39,449 --> 00:11:42,640
hija biss tip ta 'jagħti null għal kull
argumenti ma jkollu ebda valur

235
00:11:42,640 --> 00:11:43,660
għall.

236
00:11:43,660 --> 00:11:45,810
>> SAM GREEN: Liema jista
attwalment jiġi handy, jekk inti

237
00:11:45,810 --> 00:11:49,060
jridu jiktbu funzjoni li
tieħu Numru argumenti varjabbli.

238
00:11:49,060 --> 00:11:55,830
Tista 'tissettja valuri awtomatiċi fil
id-definizzjoni tal-funzjoni,

239
00:11:55,830 --> 00:11:59,060
u tista 'tinjora l-fatt
li l-input mhux hemm.

240
00:11:59,060 --> 00:12:01,584

241
00:12:01,584 --> 00:12:04,000
So I trid titkellem ftit
aktar dwar dan l-aħħar bullet

242
00:12:04,000 --> 00:12:05,541
punt, li huwa l-funzjonijiet huma valuri.

243
00:12:05,541 --> 00:12:07,930

244
00:12:07,930 --> 00:12:11,010
Dan huwa eżempju li hija
xi ftit mind-blowing

245
00:12:11,010 --> 00:12:14,880
jekk inti biss taqraha, u ma naħsibx
dwar x'inhu għaddej għat-tieni.

246
00:12:14,880 --> 00:12:17,910
Allura, ejja nħarsu biss fil
l-ewwel linja hawn.

247
00:12:17,910 --> 00:12:24,360
Għandna din varjabbli, f1, li aħna ngħidu
hija funzjoni li ma dan ħaġa.

248
00:12:24,360 --> 00:12:28,535
U l-kontenut tal-funzjoni
huma console.log ("bonjour").

249
00:12:28,535 --> 00:12:32,220
Inti tista 'taħseb console.log bħala l-
JavaScript ekwivalenti ta 'printf.

250
00:12:32,220 --> 00:12:35,510
Allura x'se jiġri huwa, jekk aħna
run dan il-kodiċi fil-browser tagħna,

251
00:12:35,510 --> 00:12:37,530
dan ser jistampa string.

252
00:12:37,530 --> 00:12:39,342
I jista 'juri li.

253
00:12:39,342 --> 00:12:42,300
UDJENZA: Billi log, għalkemm, ma li
jfissirx li huwa jkun hemm riżultat negattiv x'imkien?

254
00:12:42,300 --> 00:12:42,550
SAM GREEN: Yeah.

255
00:12:42,550 --> 00:12:44,216
So I ser nuruk dak li jiġri.

256
00:12:44,216 --> 00:12:48,085
Għalhekk il-kwistjoni kienet, dak ma log medju?

257
00:12:48,085 --> 00:12:51,262
>> HUGH ZABRISKIE: Allura console.log
huwa simili printf għall C.

258
00:12:51,262 --> 00:12:52,970
SAM GREEN: Allura console.log
huwa simili printf,

259
00:12:52,970 --> 00:12:59,240
hekk jekk I jkollhom din console.log ("bonjour"),
u I-sejħa li, l-sekwenza "Hello"

260
00:12:59,240 --> 00:13:00,730
gets stampata mal-console.

261
00:13:00,730 --> 00:13:03,340
Dan huwa l-console.

262
00:13:03,340 --> 00:13:05,930
Huwa biss bħal printf, fejn
prints li l-istandard.

263
00:13:05,930 --> 00:13:09,050

264
00:13:09,050 --> 00:13:11,230
U aħna ser tara fil-minuta,
iżda dan huwa fil-fatt

265
00:13:11,230 --> 00:13:16,529
jirreferu għall-console oġġett,
u ssejjaħ metodu fuq dak l-oġġett.

266
00:13:16,529 --> 00:13:18,320
Li ser jagħmel aktar sens
fil-minuta meta aħna

267
00:13:18,320 --> 00:13:20,660
jasal sal jitkellem dwar
oġġetti fl JavaScript,

268
00:13:20,660 --> 00:13:22,509
imma ħsibt nixtieq biss isemmu dan.

269
00:13:22,509 --> 00:13:24,300
HUGH ZABRISKIE: Aħna
użati fl C, right--

270
00:13:24,300 --> 00:13:27,580
aħna normalment jikteb programm big
fl ewlenija li tagħmel xejn.

271
00:13:27,580 --> 00:13:30,700
Imma x'hemm jibred JavaScript huwa inti
dan it-tip ta 'interpretu li

272
00:13:30,700 --> 00:13:33,620
runs fil-ħin reali, u għalhekk
tieħu biss linja b'linja,

273
00:13:33,620 --> 00:13:35,320
hija tista 'biss tinterpreta dan fuq il-post.

274
00:13:35,320 --> 00:13:37,403
U żżomm kont ta '
affarijiet li jimxu qabel,

275
00:13:37,403 --> 00:13:41,620
dan huwa għodda pretty utli li
użu console.log, jew il-console,

276
00:13:41,620 --> 00:13:46,870
ġenerali, għal biss playing
madwar mal JavaScript.

277
00:13:46,870 --> 00:13:51,420
>> SAM GREEN: Allura jmorru lura għal din
example---tieni linja tal-kodiċi

278
00:13:51,420 --> 00:13:55,320
hawnhekk hija pjuttost mind boggling in my head.

279
00:13:55,320 --> 00:13:59,790
L-ewwel darba I taqra dan,
Kien simili, x'inhu għaddej?

280
00:13:59,790 --> 00:14:04,580
Allura dak li qed jiġri huwa, dan
dikjarazzjoni funzjoni jgħid,

281
00:14:04,580 --> 00:14:10,170
I jkollhom funzjoni msejħa f2
li l-argument jistennew wieħed, f,

282
00:14:10,170 --> 00:14:12,990
u mbagħad jitlob li
, il-funzjoni f, li

283
00:14:12,990 --> 00:14:17,652
kien għadda lilha bħala argument
bl-ebda argumenti stess.

284
00:14:17,652 --> 00:14:19,110
Allura, li seta 'kien konfuża.

285
00:14:19,110 --> 00:14:21,890

286
00:14:21,890 --> 00:14:28,400
Jekk aħna nifhmu dan bħala f2 f1 jieħu
bħala argument, u mbagħad ġewwa ta 'f2,

287
00:14:28,400 --> 00:14:31,190
f gets called-- b'liema mezzi
li din il-linja ta 'kodiċi,

288
00:14:31,190 --> 00:14:34,192
wara dawn iż-żewġ linji ta '
kodiċi, jirriżulta "Hello"

289
00:14:34,192 --> 00:14:35,400
jiġi stampat għall-console.

290
00:14:35,400 --> 00:14:41,660

291
00:14:41,660 --> 00:14:44,910
>> Il-fatt li aħna jistgħu jgħaddu
funzjonijiet madwar bħala valuri

292
00:14:44,910 --> 00:14:47,870
jispiċċa jkun wieħed mill-aktar
karatteristiċi b'saħħithom ta JavaScript

293
00:14:47,870 --> 00:14:49,700
bħala lingwa ta 'programmar.

294
00:14:49,700 --> 00:14:52,782
Barra ta 'kollha ta' l-
affarijiet tal-biża li tista 'tagħmel,

295
00:14:52,782 --> 00:14:54,990
biss bħala karatteristika tal-
lingwa f'termini tal-mod

296
00:14:54,990 --> 00:14:58,400
li jagħmel l-affarijiet faċli
għall-programm u tippermetti

297
00:14:58,400 --> 00:15:01,060
għal affarijiet li mhumiex partikolarment
jixraq ferm tajjeb lill-web,

298
00:15:01,060 --> 00:15:04,500
programmazzjoni funzjonali u funzjonali
aspetti ta 'programmazzjoni ta JavaScript

299
00:15:04,500 --> 00:15:07,130
hija waħda mill-aktar
kunċetti qawwija li

300
00:15:07,130 --> 00:15:11,030
teżisti fil JavaScript-- jekk inti ssaqsi me.

301
00:15:11,030 --> 00:15:11,960
Kessaħ.

302
00:15:11,960 --> 00:15:13,534
>> Allura, ħaġa li jmiss.

303
00:15:13,534 --> 00:15:16,450
Minbarra li jkunu funzjonali,
hemm ukoll elementi ta 'JavaScript

304
00:15:16,450 --> 00:15:20,510
li huma oġġett orjentati lejn,
li hija waħda mill-ħafna

305
00:15:20,510 --> 00:15:23,800
buzz kliem popolari fix-xjenza tal-kompjuter.

306
00:15:23,800 --> 00:15:27,040
Programmazzjoni oġġett orjentati lejn
hija ħaġa verament popolari.

307
00:15:27,040 --> 00:15:34,210
JavaScript għandu verżjoni ta 'dan,
fejn Nemmen kull valur huwa wkoll

308
00:15:34,210 --> 00:15:41,475
oġġett, li jfisser li kull oġġett
garżi flimkien xi numru ta 'valuri.

309
00:15:41,475 --> 00:15:44,020

310
00:15:44,020 --> 00:15:49,750
Allura għal valuri li huma sempliċi, bħal
integer, bħal varX ugwali 5,

311
00:15:49,750 --> 00:15:52,250
dak l-oġġett biss garżi dak il-valur wieħed.

312
00:15:52,250 --> 00:15:54,760

313
00:15:54,760 --> 00:15:59,036
>> Iżda nistgħu wkoll jimmaġina sitwazzjoni
where-- nistgħu naħsbu ta 'sitwazzjonijiet fis-C

314
00:15:59,036 --> 00:16:00,910
fejn ridna li tagħmel
xi ħaġa ma structs,

315
00:16:00,910 --> 00:16:03,285
per eżempju, li garżi diversi
Valuri flimkien u jagħmel

316
00:16:03,285 --> 00:16:05,870
huwa verament faċli biex jgħaddu l-affarijiet madwar.

317
00:16:05,870 --> 00:16:09,270
Li meta l-oġġett huwa fil JavaScript.

318
00:16:09,270 --> 00:16:12,340
>> Huwa importanti li wieħed jiftakar
meta ngħid li l-oġġetti mgeżwra

319
00:16:12,340 --> 00:16:15,330
xi numru ta 'valuri flimkien,
li l-funzjonijiet huma wkoll

320
00:16:15,330 --> 00:16:21,506
valuri, li jfisser li l-funzjonijiet tista
jkun ukoll ġewwa ta 'oġġett JavaScript.

321
00:16:21,506 --> 00:16:26,910
U r-raġuni li l-importanti
hija li, filwaqt aħna sikwit

322
00:16:26,910 --> 00:16:30,290
think ta 'sejħa ta' metodu
fuq oġġett li l-

323
00:16:30,290 --> 00:16:35,200
ta 'terminu popolari minn oħrajn
lingwi popolari oġġett orjentati lejn,

324
00:16:35,200 --> 00:16:39,330
Waħda mid-differenzi hawnhekk hija li
dak kollu li metodu ma jkunx fil JavaScript

325
00:16:39,330 --> 00:16:47,270
huwa valur maħżun ġewwa ta 'oġġett
li jwettaq xi action-- possibilment

326
00:16:47,270 --> 00:16:51,850
użu tal-valuri l-oħra li huma ġewwa
ta 'dak l-oġġett, iżda mhux neċessarjament.

327
00:16:51,850 --> 00:16:56,930
Allura tista 'timmaġina sitwazzjoni, I
raden fi ftit ta 'mod crazy,

328
00:16:56,930 --> 00:17:02,990
fejn inti imsejħa metodu ta 'wieħed
joġġezzjona fuq oġġett ieħor, per eżempju.

329
00:17:02,990 --> 00:17:06,010
Għalhekk, huwa ftit funky b'dan il-mod.

330
00:17:06,010 --> 00:17:09,369
>> U tista 'wkoll jibdlu l-metodi
li huma assoċjati ma 'xi oġġett

331
00:17:09,369 --> 00:17:13,740
billi jassenja dan il-metodu ta '
funzjoni ġdida, li hija wkoll

332
00:17:13,740 --> 00:17:18,250
pretty differenti minn oħra
lingwi oġġett orjentati lejn, fejn

333
00:17:18,250 --> 00:17:21,410
ladarba aħna niddikjaraw oġġett
u instantiate dan,

334
00:17:21,410 --> 00:17:25,839
aħna ma tistax tbiddel il-metodi li huma
assoċjati ma 'dak l-oġġett aktar.

335
00:17:25,839 --> 00:17:28,680
Allura dak pjuttost differenti.

336
00:17:28,680 --> 00:17:29,570
Kessaħ.

337
00:17:29,570 --> 00:17:34,010
>> So here eżempju, minn naħa,
ta 'oġġett fl-azzjoni.

338
00:17:34,010 --> 00:17:36,390
Dan huwa dak li sejjaħ
oġġett ġeneriku, li

339
00:17:36,390 --> 00:17:39,460
ifisser li ma jkollhom l-ebda
isem partikolari, ma jkollux klassi,

340
00:17:39,460 --> 00:17:42,190
huwa biss ftit tgeżwir ta 'valuri.

341
00:17:42,190 --> 00:17:49,790
U l-mod li jistenna huwa, għandna
dan il-par ta 'barra tal kaboċċi ċineg hawn

342
00:17:49,790 --> 00:17:57,950
li jindikaw lill JavaScript
u jgħidu, dan huwa oġġett.

343
00:17:57,950 --> 00:18:02,130
Il-valuri ġewwa ta 'dan
huma kull valuri ġewwa

344
00:18:02,130 --> 00:18:04,590
tal-oġġett li għandu
jiġu mgeżwra flimkien.

345
00:18:04,590 --> 00:18:09,180
U ġewwa ta 'dak l-oġġett,
aħna mbagħad ikollhom pari b'valur ewlenin,

346
00:18:09,180 --> 00:18:13,880
fejn l-muftieħ jirreferi għall-isem
tal-valur ġewwa tal-oġġett,

347
00:18:13,880 --> 00:18:16,790
u l side-- oħra
biswit il-here-- kolon

348
00:18:16,790 --> 00:18:19,850
huwa l-valur attwali
li għandhom ikunu maħżuna.

349
00:18:19,850 --> 00:18:26,210
>> Allura inti tara hawn li għandna
ewlieni imsejħa FN b'valur sam,

350
00:18:26,210 --> 00:18:29,430
segwita minn virgola,
qal fuq id-dħul li jmiss.

351
00:18:29,430 --> 00:18:33,560
Imbagħad ewlieni msejjaħ ln,
b'valur ta 'aħdar,

352
00:18:33,560 --> 00:18:35,840
segwita minn virgola,
segwit minn "print,"

353
00:18:35,840 --> 00:18:43,209
li se jkollhom valur funzjoni
li se tagħmel din il-linja tal-kodiċi.

354
00:18:43,209 --> 00:18:45,500
Ejja tieħu pass lura u
unpack x'inhu għaddej hawn.

355
00:18:45,500 --> 00:18:47,280
Allura dan huwa ftit kumplikata,
u aħna qed tara xi ħaġa ġdida

356
00:18:47,280 --> 00:18:48,071
għall-ewwel darba.

357
00:18:48,071 --> 00:18:51,190

358
00:18:51,190 --> 00:18:55,065
Il- "dan" keyword huwa l-ħaġa ġdida
aħna qed jaraw hawn, u dak li dan ma

359
00:18:55,065 --> 00:19:00,540
huwa, jirreferi għall-kurrent
joġġezzjonaw fl-ambitu, id-dritt?

360
00:19:00,540 --> 00:19:03,990
Allura meta ngħidu, dan
turi t-triq kollha lura

361
00:19:03,990 --> 00:19:08,140
għal dan object-- kollu
meta nagħmlu this.fn,

362
00:19:08,140 --> 00:19:11,990
aħna qed tmur biex tmur it-triq lura
għal dan l-oġġett, mur l-valur fn

363
00:19:11,990 --> 00:19:16,471
u jiksbu sam, iġbdu it-triq kollha
lura, stick hawn, u mbagħad jimxu fuq.

364
00:19:16,471 --> 00:19:19,838
>> UDJENZA: Allura bl-irkupru, huwa
li jsir minħabba l-parametru

365
00:19:19,838 --> 00:19:20,621
definizzjoni?

366
00:19:20,621 --> 00:19:23,870
SAM GREEN: Għalhekk il-kwistjoni kienet, hija l-
irkupru jsir minħabba l-parametru

367
00:19:23,870 --> 00:19:24,727
definizzjoni?

368
00:19:24,727 --> 00:19:25,435
Yeah, assolutament.

369
00:19:25,435 --> 00:19:29,660

370
00:19:29,660 --> 00:19:32,470
X'hemm jiġri hawn jiġifieri,
dan dot jgħid li l-JavaScript,

371
00:19:32,470 --> 00:19:39,990
OK, jien jkollna xi valur
minn dan l-oġġett mill myself.

372
00:19:39,990 --> 00:19:46,375
U allura ser tħares għal dħul
imsejħa fn, u jekk hija tqis,

373
00:19:46,375 --> 00:19:48,470
dan ser jirritorna li value-- hekk, huwa sam.

374
00:19:48,470 --> 00:19:51,540
Imma I setgħet ukoll ittajpjat
xi ħaġa li ma kienx definit hawn,

375
00:19:51,540 --> 00:19:54,090
u allura biss
ritorn undefined-- li

376
00:19:54,090 --> 00:19:58,250
hija ħaġa li tista JavaScript
do, li jista 'jkollu benefiċċji,

377
00:19:58,250 --> 00:20:03,190
imma hija also-- jekk inti tagħmel typo,
din tista 'tirriżulta fi żbalji stramb.

378
00:20:03,190 --> 00:20:05,617
Għalhekk ser biss tipprova ssib
tkun xi tkun għid li ssib

379
00:20:05,617 --> 00:20:07,700
u mhuwiex ser
jilmentaw jekk ma jsibuha.

380
00:20:07,700 --> 00:20:11,390
Hija ser biss jgħidu, I ma
jsibuha, u mbagħad jimxu fuq.

381
00:20:11,390 --> 00:20:17,581
Għalhekk ikun undefined,
plus vojt, plus isem l-aħħar.

382
00:20:17,581 --> 00:20:18,080
Yeah.

383
00:20:18,080 --> 00:20:21,070
U allura nistgħu naraw li jekk aħna
imbagħad tista 'tmur isfel u access--

384
00:20:21,070 --> 00:20:25,450
u nitolbu tf.print () bil-parentesi.

385
00:20:25,450 --> 00:20:30,000
Huwa ser sejħa li jistampaw
funzjoni bl-ebda argumenti, id-dritt?

386
00:20:30,000 --> 00:20:34,490
Imma jekk aħna biss qal tf.print ()
punto virgola, mingħajr il-parentesi,

387
00:20:34,490 --> 00:20:37,480
li kollha kien jagħmel huwa pull
il-funzjoni mill-valur,

388
00:20:37,480 --> 00:20:40,609
iżda mhux attwalment imsejħa.

389
00:20:40,609 --> 00:20:41,162
Kessaħ.

390
00:20:41,162 --> 00:20:42,870
HUGH ZABRISKIE: Jekk
nagħmlu oġġett?

391
00:20:42,870 --> 00:20:44,161
SAM GREEN: Sure, ejja tagħmel dan.

392
00:20:44,161 --> 00:20:48,750
So I tista 'timxi dan
Eżempju mal-console.

393
00:20:48,750 --> 00:20:51,380

394
00:20:51,380 --> 00:20:55,466
Nistgħu nimmaġinaw li għandi oġġett.

395
00:20:55,466 --> 00:21:03,026

396
00:21:03,026 --> 00:21:04,150
Allura dan huwa oġġett sempliċi.

397
00:21:04,150 --> 00:21:06,910

398
00:21:06,910 --> 00:21:11,050
Dan huwa oġġett li fih tnejn
Valuri b'żewġ ċwievet, żewġ valur ewlieni

399
00:21:11,050 --> 00:21:12,710
pari.

400
00:21:12,710 --> 00:21:21,850
So I imbagħad jistgħu jaċċedu għall-valur maħżun
ġewwa ta 'dan l-oġġett billi tagħmel x.x1,

401
00:21:21,850 --> 00:21:23,400
per eżempju, u niġi 1 lura.

402
00:21:23,400 --> 00:21:29,590
Bl-istess mod, x.x2, nikseb dak il-valur lura.

403
00:21:29,590 --> 00:21:33,330
>> U issa l-ħaġa verament jibred huwa, I jista
attwalment żżid xi ħaġa għal dan l-oġġett

404
00:21:33,330 --> 00:21:34,316
wara Stajt maħluqa minnha.

405
00:21:34,316 --> 00:21:36,315
Allura tista 'timmaġina, ejja
jgħidu I għandhom funzjoni.

406
00:21:36,315 --> 00:21:44,430

407
00:21:44,430 --> 00:21:46,352
>> HUGH ZABRISKIE: You
għandek tagħmel Shift-Ikteb.

408
00:21:46,352 --> 00:21:47,643
>> SAM GREEN: Oh, dan huwa annoying.

409
00:21:47,643 --> 00:22:02,460

410
00:22:02,460 --> 00:22:04,324
What did li ma simili?

411
00:22:04,324 --> 00:22:04,824
Oh.

412
00:22:04,824 --> 00:22:07,532

413
00:22:07,532 --> 00:22:08,691
Here we go.

414
00:22:08,691 --> 00:22:09,190
Kessaħ.

415
00:22:09,190 --> 00:22:12,840
>> Hekk stajt biss maħluqa
din il-funzjoni, f, li

416
00:22:12,840 --> 00:22:17,590
se jmorru għall-kurrent
oġġett u this.x1 print.

417
00:22:17,590 --> 00:22:20,330
Mela jekk jien biss sejħa f billi
innifsu, xejn għaddej

418
00:22:20,330 --> 00:22:26,970
li jiġri, id-dritt, għaliex m'hemmx x1
qasam fl-oġġett huwa jirreferu għall.

419
00:22:26,970 --> 00:22:39,710
Iżda, jekk ngħid, x.f = f, u mbagħad I
sejħa x.f (), jien ser terġa 'lura 1.

420
00:22:39,710 --> 00:22:42,990

421
00:22:42,990 --> 00:22:46,530
Li f funzjoni issa huwa
assoċjati mal-oġġett x,

422
00:22:46,530 --> 00:22:51,800
li għandha ċavetta tissejjaħ x1
assoċjati mal-valur 1,

423
00:22:51,800 --> 00:22:54,570
hekk meta aħna sejħa this.x1, huwa
ser issib dak li qed ifittxu għall

424
00:22:54,570 --> 00:22:56,450
u jkunu kapaċi li jistampa valur out.

425
00:22:56,450 --> 00:22:58,700
Allura li jinsab biss eżempju wieħed
tax-xorta mill-affarijiet crazy

426
00:22:58,700 --> 00:23:01,190
inti tista 'tagħmel ma' oġġetti fil JavaScript.

427
00:23:01,190 --> 00:23:03,870

428
00:23:03,870 --> 00:23:07,560
>> Allura dik il-verżjoni kienet l
verżjoni ġenerika, tifsira

429
00:23:07,560 --> 00:23:13,780
li ħloqna oġġett jużaw dan
parentesi notazzjoni Brace notation--,

430
00:23:13,780 --> 00:23:16,880
rather-- u li
handy jekk aħna biss jixtiequ

431
00:23:16,880 --> 00:23:21,440
eżempju wieħed ta 'oġġett partikolari, iżda
dak jekk irridu li jkollna aktar minn waħda

432
00:23:21,440 --> 00:23:22,210
tal-istess tip?

433
00:23:22,210 --> 00:23:24,440
U r-risposta għal din
kwistjoni hija, hemm affarijiet

434
00:23:24,440 --> 00:23:26,760
imsejħa klassijiet fl JavaScript ukoll.

435
00:23:26,760 --> 00:23:31,470

436
00:23:31,470 --> 00:23:36,420
Nistgħu noħolqu funzjoni li
ma xi tip ta 'inizjalizzazzjoni

437
00:23:36,420 --> 00:23:41,690
għal oġġett barrani,
u aħna jgħidu, bħal,

438
00:23:41,690 --> 00:23:44,550
class-- tiegħi hekk l-isem
tal-object-- jistgħu jerġgħu jintużaw

439
00:23:44,550 --> 00:23:47,100
ugwali funzjoni li tistabbilixxi it up.

440
00:23:47,100 --> 00:23:52,280
Allura dak li dan ikun ekwivalenti
li qed toħloq oġġett li

441
00:23:52,280 --> 00:23:55,930
ikun biss tixtieq,
kaboċċi Brace, str, kolon,

442
00:23:55,930 --> 00:23:59,630
dan huwa spag,
punto virgola, kaboċċi Brace.

443
00:23:59,630 --> 00:24:01,880
Dan ikun il-ġeneriku
oġġett aħna initialize,

444
00:24:01,880 --> 00:24:06,380
bid-differenza wieħed minnhom fuq il-
linji li ġejjin aħna joħolqu prototip, li

445
00:24:06,380 --> 00:24:11,190
ifisser li huwa ċ-ċavetta default li
aħna żid għal oġġett tagħna li

446
00:24:11,190 --> 00:24:13,970
għandu l-valur elenkati hawn.

447
00:24:13,970 --> 00:24:20,570
Li jfisser li, meta I joħolqu ġdida
eżempju ta 'dan l-oġġett MyClass,

448
00:24:20,570 --> 00:24:27,440
li għaddej biex tkun pre-mibnija ġewwa ta
dan valur imsejħa str u l-valur ieħor

449
00:24:27,440 --> 00:24:32,418
imsejħa myPrint, li hija
se tkun funzjoni.

450
00:24:32,418 --> 00:24:32,918
Tal-biża.

451
00:24:32,918 --> 00:24:37,410

452
00:24:37,410 --> 00:24:37,990
>> Great.

453
00:24:37,990 --> 00:24:40,710
Allura l-aħħar ħaġa li
jgħidu dwar JavaScript

454
00:24:40,710 --> 00:24:46,430
hija li huwa verament utli għal dak li
huma msejħa operazzjonijiet mhux sinkroniku.

455
00:24:46,430 --> 00:24:52,500
Mezzi Asinkronika hija li aħna
jistax jistenna xi operazzjoni

456
00:24:52,500 --> 00:24:57,870
biex jitlesta qabel nimxu
fuq, iżda jimxu fuq filwaqt li qed nistennew

457
00:24:57,870 --> 00:24:59,690
u mbagħad ikollhom xi ħaġa jiġri aktar tard.

458
00:24:59,690 --> 00:25:03,480
U dak I jfisser minn dak huwa, inti
jista 'jimmaġina sitwazzjoni fejn

459
00:25:03,480 --> 00:25:06,850
inti tibgħat talba lill
xi web server x'imkien,

460
00:25:06,850 --> 00:25:09,670
u li għaddej biex inti tibgħat lura
xi blokki kbar ta 'data, id-dritt?

461
00:25:09,670 --> 00:25:13,320
U l-utent tiegħek setgħux jistennew fil-
frattemp għal dak li jiġri,

462
00:25:13,320 --> 00:25:15,200
u xejn ma jista 'jkun
għaddej f'dak il-ħin.

463
00:25:15,200 --> 00:25:18,110
Iżda li mhux disinn kbir, id-dritt?

464
00:25:18,110 --> 00:25:20,214
Inti ma tridx il-paġna web li jiffriżaw.

465
00:25:20,214 --> 00:25:22,380
X'jiġri jekk l-utent irid
ikklikkja fuq menu drop-down?

466
00:25:22,380 --> 00:25:24,870
Mhuwiex mudell tad-disinn kbir.

467
00:25:24,870 --> 00:25:29,290
Minflok, bażikament dak
JavaScript ma huwa jgħid,

468
00:25:29,290 --> 00:25:31,870
OK, tagħmel din l-operazzjoni asynchronously.

469
00:25:31,870 --> 00:25:36,520
Allura simili, stenna fl-isfond,
u mbagħad meta l-operazzjoni isir,

470
00:25:36,520 --> 00:25:39,420
sejħa tal-callback function--
sejħa xi funzjoni,

471
00:25:39,420 --> 00:25:43,800
Do xi action-- li sinjal li l-
operazzjoni aħna kienu qed jistennew sa l-aħħar

472
00:25:43,800 --> 00:25:45,520
huwa fuq.

473
00:25:45,520 --> 00:25:51,240
U r-raġuni li l-super qawwija hija,
nistgħu nagħmlu xi ħaġa, jgħaddu argument,

474
00:25:51,240 --> 00:25:54,440
tagħmel xi ħaġa, u mbagħad stenna
għal xi ħaġa li jiġri.

475
00:25:54,440 --> 00:25:58,970
Imbagħad, ladarba li xi ħaġa
jikkompleta, nistgħu sejħa callback.

476
00:25:58,970 --> 00:26:03,300
Li tassew handy għaliex tikri
us do affarijiet ma Web Audio API,

477
00:26:03,300 --> 00:26:07,490
per eżempju, bħal tagħbija
audio file minn server remot

478
00:26:07,490 --> 00:26:11,660
mingħajr ma jkollhom għalfejn jistennew l-
audio file kollu li titgħabba,

479
00:26:11,660 --> 00:26:14,440
li tkun verament
ħażin għal esperjenza utent.

480
00:26:14,440 --> 00:26:17,080
Kessaħ.

481
00:26:17,080 --> 00:26:19,460
>> Aħħar ftit noti dwar
debugging, peress li dan

482
00:26:19,460 --> 00:26:23,682
hija ħaġa int ser ikollhom jagħmlu
bħala parti mill-proġett tiegħek, garantiti.

483
00:26:23,682 --> 00:26:25,140
Semmejt il JavaScript console.

484
00:26:25,140 --> 00:26:27,550
Huwa fattur super utli
ta browsers moderni kollha,

485
00:26:27,550 --> 00:26:30,300
U aħna verament ninkoraġġukom biex tikseb
komdu tuża tiegħek console,

486
00:26:30,300 --> 00:26:33,660
jekk inti tixtieq li tikseb tajba fil JavaScript.

487
00:26:33,660 --> 00:26:36,320
Huwa super handy għall
debugging, imma hija wkoll

488
00:26:36,320 --> 00:26:39,440
verament utli għall jidhru
kif jużaw API.

489
00:26:39,440 --> 00:26:41,950
Hija tippermetti tassew
esperimentazzjoni faċli

490
00:26:41,950 --> 00:26:45,910
mingħajr ma jkollhom tip xi
kodiċi, u mbagħad josservawha.

491
00:26:45,910 --> 00:26:47,500
Inti ma għandekx tagħmel dawk il-passi kollha.

492
00:26:47,500 --> 00:26:49,619
Tista 'biss jiktbu
xi kodiċi fis-linja,

493
00:26:49,619 --> 00:26:52,410
u mbagħad tieħu rispons immedjat fuq
jekk dik il-linja ta 'kodiċi jew le

494
00:26:52,410 --> 00:26:55,230
worked-- ferm handy.

495
00:26:55,230 --> 00:26:59,760
>> U wkoll, biss note-- teknika waħda
il JavaScript console huwa eżempju

496
00:26:59,760 --> 00:27:05,680
ta 'REPL-- b'tali mod li R-E-P-L, repl,
li stands għall read, jevalwaw,

497
00:27:05,680 --> 00:27:06,180
loop print.

498
00:27:06,180 --> 00:27:09,100

499
00:27:09,100 --> 00:27:12,120
Int ser tip xi għalf
fl-ilma għax taf taqra dak li inti ittajpjat fil,

500
00:27:12,120 --> 00:27:17,280
dan ser tevalwa, u dan ser jistampaw il-
output, u mbagħad dan ser jerġa 'jibda.

501
00:27:17,280 --> 00:27:22,056
Li jippermettilek li tmur malajr fil
ċrieki mtennija, li huwa verament jibred.

502
00:27:22,056 --> 00:27:25,150

503
00:27:25,150 --> 00:27:28,930
>> I raden aħħar reali note-- dan
huwa l-aħħar nota attwali, iva.

504
00:27:28,930 --> 00:27:30,780
Kif nistgħu attwalment jużaw JavaScript?

505
00:27:30,780 --> 00:27:34,040
Allura l-ewwel, nistgħu importazzjoni
billi tuża tag iskrittura

506
00:27:34,040 --> 00:27:39,500
fil-quċċata jew fil-qiegħ ta 'HTML file--
kullimkien ġewwa ta 'fajl HTML,

507
00:27:39,500 --> 00:27:40,440
verament.

508
00:27:40,440 --> 00:27:47,390
U fi ħdan tag iskrittura, hemm
żewġ sub-modi ta 'importazzjoni JavaScript.

509
00:27:47,390 --> 00:27:51,370
L-ewwel huwa billi jkun hemm
fajl JavaScript separat

510
00:27:51,370 --> 00:27:58,010
li aħna l-importazzjoni fl-intier tiegħu, jew
billi kejl ta 'kodiċi bħal iskrittura

511
00:27:58,010 --> 00:28:00,290
biex tibda, u mbagħad
iskrittura backslash sat-tmiem.

512
00:28:00,290 --> 00:28:02,620
U allura aħna biss jiktbu
JavaScript ġewwa l-fajl HTML.

513
00:28:02,620 --> 00:28:03,790
Dawk huma l-żewġ modi.

514
00:28:03,790 --> 00:28:05,165
Ma jistax ikollok dan ġewwa ta HTML.

515
00:28:05,165 --> 00:28:06,502

516
00:28:06,502 --> 00:28:08,126
UDJENZA: Huwa wieħed aħjar mill-oħra?

517
00:28:08,126 --> 00:28:10,542
SAM GREEN: Il-kwistjoni kienet,
hija waħda aħjar mill-oħra.

518
00:28:10,542 --> 00:28:18,306
Allura, iva, bħala prattika stil kodifikazzjoni,
u wkoll huwa simili prattika disinn.

519
00:28:18,306 --> 00:28:20,180
Hemm żewġ raġunijiet
għaliex jista 'jkun aħjar.

520
00:28:20,180 --> 00:28:23,934
L-ewwel huwa, jagħmel kodiċi tiegħek
ħafna aktar tinqara jekk il HTML tiegħek

521
00:28:23,934 --> 00:28:27,100
huwa f'post wieħed, kollha CSS tiegħek huwa fi
post ieħor, kollha ta 'tiegħek JavaScript

522
00:28:27,100 --> 00:28:28,420
huwa fil-tielet post.

523
00:28:28,420 --> 00:28:28,920
Dritt?

524
00:28:28,920 --> 00:28:32,370
Naħseb li għandna diġà tkellem
dwar dan fl sections-- bħal CSS-- dak

525
00:28:32,370 --> 00:28:35,220
li is-- u din tmur
spiss fil-fajl ieħor.

526
00:28:35,220 --> 00:28:37,090
Allura, tip simili ta 'kunċett hawn.

527
00:28:37,090 --> 00:28:42,410
Tista 'wkoll jimmaġina li JavaScript
se jerġgħu jintużaw fuq aktar minn waħda

528
00:28:42,410 --> 00:28:47,350
Paġna HTML, jew forsi
paġni HTML kbir ħafna,

529
00:28:47,350 --> 00:28:49,340
u li dan JavaScript
refactored f'waħda

530
00:28:49,340 --> 00:28:51,950
fajl li inti tista 'importazzjoni
fis f'aktar minn post wieħed

531
00:28:51,950 --> 00:28:54,570
tippermetti l-kodiċi li
b'mod aktar maintainable.

532
00:28:54,570 --> 00:28:57,930
Tista 'timmaġina għamel wieħed
bidla fil-JavaScript

533
00:28:57,930 --> 00:29:00,070
u ma jbiddlu dan
f'100 fajls differenti.

534
00:29:00,070 --> 00:29:04,070
U minflok nistgħu biss jibdlu dan
wieħed, li huwa mod aktar qawwija.

535
00:29:04,070 --> 00:29:05,420
Did I iwieġeb il-mistoqsija tiegħek?

536
00:29:05,420 --> 00:29:07,950
Kessaħ.

537
00:29:07,950 --> 00:29:10,830
>> Nistgħu wkoll tip fil-console,
kif konna imsemmi qabel.

538
00:29:10,830 --> 00:29:15,070
U għal darb'oħra, l-aħħar note-- wieħed
Web Audio hija mibnija,

539
00:29:15,070 --> 00:29:16,978
inti m'għandekx bżonn tagħbija xejn.

540
00:29:16,978 --> 00:29:17,478
Kessaħ.

541
00:29:17,478 --> 00:29:20,519
Hemm xi mistoqsijiet, għandek
kwalunkwe aktar mistoqsijiet dwar JavaScript,

542
00:29:20,519 --> 00:29:21,930
qabel nimxu fuq?

543
00:29:21,930 --> 00:29:24,286
>> UDJENZA: [inaudible]

544
00:29:24,286 --> 00:29:25,410
SAM GREEN: Kull dritt, berred.

545
00:29:25,410 --> 00:29:27,200
Allura issa huwa għaddej biex jitkellmu dwar l-API.

546
00:29:27,200 --> 00:29:28,490
>> HUGH ZABRISKIE: Kessaħ.

547
00:29:28,490 --> 00:29:28,990
Grazzi, Sam.

548
00:29:28,990 --> 00:29:30,184
>> SAM GREEN: Sure.

549
00:29:30,184 --> 00:29:32,600
HUGH ZABRISKIE: biża, so
aħna ser jimxu fuq minn JavaScript.

550
00:29:32,600 --> 00:29:35,350
Allura konna tkellimna dwar xi wħud
l-essenzjali ta 'JavaScript,

551
00:29:35,350 --> 00:29:41,105
u dawk huma l-varjabbli, il-funzjonijiet,
oġġetti, il-funzjonijiet kif varjabbli,

552
00:29:41,105 --> 00:29:41,980
tagħbija mhux sinkroniku.

553
00:29:41,980 --> 00:29:46,100
Dawn huma kollha affarijiet li inti ser
tara kif tuża l-Web Audio.

554
00:29:46,100 --> 00:29:49,230
Allura aħna qed biss ser jitkellmu
dwar l-ewwel fuq livell għoli.

555
00:29:49,230 --> 00:29:52,120
>> Huwa ta 'API, dan huwa xi ħaġa
li mibni, kif Sam qal,

556
00:29:52,120 --> 00:29:57,010
dritt fil-JavaScript
li tuża fil-console.

557
00:29:57,010 --> 00:30:01,020
U huwa attwalment bħad C ++ kodiċi
li huwa verament mibnija fis Chrome

558
00:30:01,020 --> 00:30:04,470
u Firefox, u kollha ta 'dawn browsers.

559
00:30:04,470 --> 00:30:07,060
Allura l-idea prinċipali mal-Web
Audio huwa li inti għandek

560
00:30:07,060 --> 00:30:09,440
dan it-tip ta 'pipeline ta' awdjo, right?

561
00:30:09,440 --> 00:30:13,670
Allura data audio tiegħek
taqa 'fil f'xi forma.

562
00:30:13,670 --> 00:30:16,690
>> Hemm tip ta 'tlieta forms-- prinċipali
inti għandek il-ossillatur, li

563
00:30:16,690 --> 00:30:21,340
joħloq mewġa sinusojdali, mewġa cosine,
aħna qed tmur biex tara kif din taħdem.

564
00:30:21,340 --> 00:30:23,890
Ieħor wieħed komuni ħafna,
naturalment, huwa MP3.

565
00:30:23,890 --> 00:30:25,810
Allura forsi inti tibda bil
kanzunetta, u allura inti

566
00:30:25,810 --> 00:30:28,320
trid tagħmel xi filtrazzjoni
għal dak u l-produzzjoni

567
00:30:28,320 --> 00:30:30,605
that-- li jista 'jkun sors possibbli.

568
00:30:30,605 --> 00:30:32,480
U mbagħad verament jibred
waħda hija l-mikrofonu.

569
00:30:32,480 --> 00:30:37,230
Allura inti tista 'tuża xi ħafna
sejħiet bażiċi fil JavaScript

570
00:30:37,230 --> 00:30:39,440
biex jiksbu aċċess għall-
mikrofonu, u hekk jekk inti

571
00:30:39,440 --> 00:30:42,870
riedu jagħmlu app
bħal detector grawnd,

572
00:30:42,870 --> 00:30:45,290
per eżempju, li jieħu fil
vuċi tiegħek u l-figuri barra

573
00:30:45,290 --> 00:30:47,740
l pitch-- mod faċli ħafna għal dan.

574
00:30:47,740 --> 00:30:50,730
Tista 'biss tip ta' taqrah
in, insemmu l-frekwenza,

575
00:30:50,730 --> 00:30:52,250
u mbagħad output numru.

576
00:30:52,250 --> 00:30:56,080
Allura aħna ser tara kif din taħdem, kif ukoll.

577
00:30:56,080 --> 00:30:59,430
>> Id-destinazzjoni hija bażikament
fejn id-data awdjo huwa output.

578
00:30:59,430 --> 00:31:02,890
Allura ġenerali, li huwa simili
kelliema laptop tiegħek.

579
00:31:02,890 --> 00:31:05,610
Għażliet oħra huma simili
a ScriptProcessorNode--

580
00:31:05,610 --> 00:31:07,990
aħna ser tingħata biex nodes '
second-- imma bażikament,

581
00:31:07,990 --> 00:31:11,939
jew int tqegħid ħoss out
permezz tal-kompjuter tiegħek permezz kelliema,

582
00:31:11,939 --> 00:31:14,730
jew int tip ta 'reġistrazzjoni li, hekk
int maħżuna bħala data awdjo.

583
00:31:14,730 --> 00:31:18,980
Hekk forsi jekk xi ħadd toħloq
mużika fil app tiegħek u mbagħad

584
00:31:18,980 --> 00:31:22,410
inti tixtieq li tirreġistra dik u forsi bħal
esportazzjoni lill SoundCloud, għall example--

585
00:31:22,410 --> 00:31:25,281
li jkun mod wieħed biex tagħmel dan.

586
00:31:25,281 --> 00:31:27,030
L-għalf gost,
li aħna ser nitkellmu dwar,

587
00:31:27,030 --> 00:31:29,950
jiġri bejn dawn iż-żewġ punti,
fejn aħna tagħbija fil-mużika

588
00:31:29,950 --> 00:31:31,410
u mbagħad output dan.

589
00:31:31,410 --> 00:31:36,660
>> Hekk jien ser jitkellmu dwar il-ħames
stadji ta 'produzzjoni awdjo fit-tieni.

590
00:31:36,660 --> 00:31:38,950
Għandna din ħaġa imsejħa
l AudioContext, li

591
00:31:38,950 --> 00:31:41,580
huwa dan ippakkjar ftit naraw hawn.

592
00:31:41,580 --> 00:31:49,980
Bażikament dak AudioContext is-- jekk aħna
mur l-JavaScript console dritt issa,

593
00:31:49,980 --> 00:31:52,740
nistgħu noħolqu wieħed dritt issa.

594
00:31:52,740 --> 00:31:54,040
Just eżempju ta repl, id-dritt?

595
00:31:54,040 --> 00:31:57,880
Aħna qed taqra,
evalwazzjoni, u prints.

596
00:31:57,880 --> 00:32:00,260
>> AudioContext hija stat globali.

597
00:32:00,260 --> 00:32:05,500
Huwa Struct, huwa oġġett
hawn, u din iżżomm informazzjoni

598
00:32:05,500 --> 00:32:09,960
dwar affarijiet li huma għaddejjin
fuq l-iskrin relatati mal awdjo.

599
00:32:09,960 --> 00:32:15,220
Eżempju wieħed huwa l-ħin kurrenti.

600
00:32:15,220 --> 00:32:18,910
Dan jgħidlek in-numru
ta 'sekonda, b'mod preċiż ħafna,

601
00:32:18,910 --> 00:32:20,890
peress li l-paġna web mgħobbija.

602
00:32:20,890 --> 00:32:24,110
Allura dan huwa verament utli
ftit proprjetà li tista 'tuża.

603
00:32:24,110 --> 00:32:27,898
Huwa aqra only-- I think attwalment
inti tista 'tipprova li din valur.

604
00:32:27,898 --> 00:32:29,856
Hija ser jgħidlek tissettja,
u mbagħad jekk inti jistampaw

605
00:32:29,856 --> 00:32:31,439
again-- hija ma attwalment pjuttost xogħol.

606
00:32:31,439 --> 00:32:34,472
Allura hemm read-only
proprjetajiet JavaScript.

607
00:32:34,472 --> 00:32:36,430
Dan huwa verament utli jekk
int tip ta 'syncing

608
00:32:36,430 --> 00:32:38,610
ħafna differenti
informazzjoni, meta int

609
00:32:38,610 --> 00:32:41,280
tip ta 'playing ħsejjes differenti.

610
00:32:41,280 --> 00:32:43,630
>> Ieħor verament utli
hija d-destinazzjoni kuntest.

611
00:32:43,630 --> 00:32:46,587

612
00:32:46,587 --> 00:32:49,670
Żgur, jekk int interessat, ikun
tipprova dan fil stess console tiegħek dritt

613
00:32:49,670 --> 00:32:50,980
issa.

614
00:32:50,980 --> 00:32:53,150
Allura dan huwa AudioDestinationNode.

615
00:32:53,150 --> 00:32:56,480
Bażikament dak li dan jgħid hu,
fejn il-produzzjoni tmur?

616
00:32:56,480 --> 00:32:59,590
Allura hemm żewġ għażliet reali hawn.

617
00:32:59,590 --> 00:33:01,940
Normalment l-inadempjenza
huwa biss kelliema tiegħek,

618
00:33:01,940 --> 00:33:05,150
hekk AudioDestinationNode
bażikament biss jgħid

619
00:33:05,150 --> 00:33:09,240
hemm żero outputs għall-ħoss
ġejjin fi, mibgħuta lill-kelliem.

620
00:33:09,240 --> 00:33:12,050
Allura ġeneralment, inti ma
għandek biex tilgħab ma 'dak.

621
00:33:12,050 --> 00:33:15,720
Jekk int interessat fil attwalment qed jużaw
l ScriptProcessorNode għar-reġistrazzjoni,

622
00:33:15,720 --> 00:33:16,990
definittivament rimja me
email aktar tard minħabba li l

623
00:33:16,990 --> 00:33:18,330
ftit aktar kumplikata.

624
00:33:18,330 --> 00:33:21,590
Iżda ġeneralment, int biss tip
outputting ħoss f'xi forma.

625
00:33:21,590 --> 00:33:24,347
Hekk jibred, aħna ser jaqbżu lura hawn.

626
00:33:24,347 --> 00:33:25,180
UDJENZA: Jien sorry.

627
00:33:25,180 --> 00:33:26,054
HUGH ZABRISKIE: Yeah.

628
00:33:26,054 --> 00:33:28,770
UDJENZA: Naf li inti qal li nitkellmu
lilek aktar tard dwar reġistrazzjoni.

629
00:33:28,770 --> 00:33:31,550
Inti tista 'interface li ma Pro Għodod?

630
00:33:31,550 --> 00:33:33,120
>> HUGH ZABRISKIE: Bil Pro Għodod?

631
00:33:33,120 --> 00:33:35,260
Ejja naraw.

632
00:33:35,260 --> 00:33:37,220
I do not think so.

633
00:33:37,220 --> 00:33:41,670
Allura jmorru bejn il-klijent,
li hija l-JavaScript

634
00:33:41,670 --> 00:33:44,310
console, u attwali tiegħek
kompjuter, huwa ġeneralment

635
00:33:44,310 --> 00:33:46,490
xi ħaġa li xorta
ta barra mill-limiti, jekk inti

636
00:33:46,490 --> 00:33:52,320
se, tip min-natura tal the--
huwa tip ta 'ħaġa disinn,

637
00:33:52,320 --> 00:33:57,770
imma inti jippruvaw iżommu l-browser separat
mill-kompjuter attwali tal-utent.

638
00:33:57,770 --> 00:34:02,310
Ġeneralment, l-unika ħaġa int kapaċi
aċċess huwa l-mikrofonu jew l-kamera.

639
00:34:02,310 --> 00:34:04,730
Int mhux kapaċi, I
ma naħsibx, l-użu Pro Għodod.

640
00:34:04,730 --> 00:34:07,480
Madankollu, jekk inti maħluqa
track fil Pro Għodod,

641
00:34:07,480 --> 00:34:12,710
esportati li, inti tista 'tagħbija li
fil hawn, iffiltra, per eżempju,

642
00:34:12,710 --> 00:34:16,820
proċess li, u tirreġistra dik fi
Audio Destination-- jew, no-- Sfera

643
00:34:16,820 --> 00:34:17,870
Node proċessur.

644
00:34:17,870 --> 00:34:20,730
U allura minn hemm, inti tista '
esportazzjoni li biex SoundCloud, inti

645
00:34:20,730 --> 00:34:25,320
tista 'tibgħat fl-istess email, jew
tkun xi tkun tixtieq minn hemm.

646
00:34:25,320 --> 00:34:31,159
>> Iżda hemm tip ta 'ostaklu żgħir
bejn li jagħmlu mużika fuq il-kompjuter tiegħek

647
00:34:31,159 --> 00:34:33,050
u jagħmlu mużika online.

648
00:34:33,050 --> 00:34:37,940
>> SAM GREEN: U li
uniċi għal din API.

649
00:34:37,940 --> 00:34:44,060
Huwa fattur sigurtà tal Chrome, u
Naħseb li kull browser oħra moderna.

650
00:34:44,060 --> 00:34:45,860
Il-browser huwa self-contained.

651
00:34:45,860 --> 00:34:50,980
Hekk per eżempju, paġna web ma jistgħux
użu JavaScript biex inbiddlu l-ħoss

652
00:34:50,980 --> 00:34:54,190
fuq fuq kelliema tiegħek, per eżempju.

653
00:34:54,190 --> 00:34:58,120
Jew ma tistax iddawwar il-kompjuter tiegħek off.

654
00:34:58,120 --> 00:35:01,530
U ma hemm ebda punt intermedju
bejn dawn iż-żewġ affarijiet, id-dritt,

655
00:35:01,530 --> 00:35:05,960
dan jew ikollok
estrazzjoni sħiħa,

656
00:35:05,960 --> 00:35:10,050
jew inti tiftaħ il-
difett sigurtà ta 'kiri

657
00:35:10,050 --> 00:35:14,440
programmer intenzjonijiet ħżiena jagħmlu
kull ma trid ma laptop tiegħek.

658
00:35:14,440 --> 00:35:18,104
U hu għalhekk Chrome huwa self-contained.

659
00:35:18,104 --> 00:35:19,310
>> HUGH ZABRISKIE: Yeah.

660
00:35:19,310 --> 00:35:20,840
Does li jagħmel sens?

661
00:35:20,840 --> 00:35:21,369
Kessaħ, berred.

662
00:35:21,369 --> 00:35:23,160
I kien biss se
juru eżempju ta 'wieħed.

663
00:35:23,160 --> 00:35:25,118
Dan huwa pretty ħafna bħala
kemm ikollok, f'termini

664
00:35:25,118 --> 00:35:26,950
ta 'aċċess utent tal-kompjuter.

665
00:35:26,950 --> 00:35:30,180
Jekk ikollok xi USB tastiera pplaggjata,
inti tista 'tuża xi ħaġa imsejjaħ il-Web

666
00:35:30,180 --> 00:35:32,180
MIDI API, li aħna mhux se
verament jitkellmu dwar hawn,

667
00:35:32,180 --> 00:35:36,330
iżda dan huwa API ieħor li l-
mibnija fis-inqas Chrome-- darb'oħra,

668
00:35:36,330 --> 00:35:41,570
dan huwa għaliex aħna imħabba Chrome--
I think Firefox jew Safari,

669
00:35:41,570 --> 00:35:44,300
din hija ħaġa faċli biex
browsers differenti google-- jkollhom

670
00:35:44,300 --> 00:35:46,917
appoġġ differenti li għalihom
APIs li jkunu implimentati.

671
00:35:46,917 --> 00:35:49,875
Imma jekk int riedu plagg fil tastiera
u taħdem ma dik l-informazzjoni,

672
00:35:49,875 --> 00:35:52,850
tip ta 'jibgħat il-keyboard
informazzjoni fuq il-kompjuter

673
00:35:52,850 --> 00:35:57,620
u mbagħad jużaw dan online, din API
huwa fejn youd tkun taħdem dan.

674
00:35:57,620 --> 00:35:58,150
>> Kessaħ.

675
00:35:58,150 --> 00:35:58,710
KOLLOX SEW.

676
00:35:58,710 --> 00:36:01,320
Allura, malajr jimxu fuq hawn.

677
00:36:01,320 --> 00:36:03,310
Kif aħna nagħmlu fil-ħin?

678
00:36:03,310 --> 00:36:04,210
>> SPEAKER 1: About 15.

679
00:36:04,210 --> 00:36:05,543
>> HUGH ZABRISKIE: 15-il minuta xellug?

680
00:36:05,543 --> 00:36:06,160
OK, berred.

681
00:36:06,160 --> 00:36:08,170
Allura aħna ser razza quddiem hawnhekk.

682
00:36:08,170 --> 00:36:13,500
>> Allura bażikament, il-punt ewlieni ta '
ħsieb ta dan bħala pipeline

683
00:36:13,500 --> 00:36:16,430
huwa li kull pass fil-pipeline
hija serje ta 'punti ta' konġunzjoni awdjo.

684
00:36:16,430 --> 00:36:19,284

685
00:36:19,284 --> 00:36:20,950
Sors tagħna, ejja ngħidu, huwa oxxillatur.

686
00:36:20,950 --> 00:36:23,380
Għandna bżonn li jinħoloq node oxxillatur.

687
00:36:23,380 --> 00:36:25,690
U li huwa biss it-tip
tal-function-- ftit

688
00:36:25,690 --> 00:36:30,460
u dawn qed kollha bbażati barra
tal-kuntest awdjo hawn.

689
00:36:30,460 --> 00:36:32,885
>> UDJENZA: Meta qal
oxxillatur, ma jfissirx li

690
00:36:32,885 --> 00:36:37,250
Huwa fil-fatt litteralment jmorru minn
żewġ poli differenti u lura?

691
00:36:37,250 --> 00:36:41,170
>> HUGH ZABRISKIE: Le, huwa simili
rappreżentazzjoni diġitali.

692
00:36:41,170 --> 00:36:42,740
Huwa fil-fatt implimentati C ++.

693
00:36:42,740 --> 00:36:46,460
I attwalment do not know-specs
ta 'kif huwa attwalment implimenta,

694
00:36:46,460 --> 00:36:48,500
iżda dan kollu qed taħdem bħala data binarja.

695
00:36:48,500 --> 00:36:51,260

696
00:36:51,260 --> 00:36:52,370
Attwalment, yeah.

697
00:36:52,370 --> 00:36:53,950
Dan ikun qal, I jistgħu
fil-fatt, jekk int interessat,

698
00:36:53,950 --> 00:36:56,533
I inti tista 'tibgħat aktar ftit
informazzjoni dwar kif f'forom ta 'mewġ

699
00:36:56,533 --> 00:37:00,181
jinżammu jkollhom format diġitali.

700
00:37:00,181 --> 00:37:00,680
OK, berred.

701
00:37:00,680 --> 00:37:03,120
>> Allura aħna qed jiġġeneraw tone bħal sine
mewġa jew xi ħaġa bħal dik, forsi

702
00:37:03,120 --> 00:37:04,190
440 Hertz.

703
00:37:04,190 --> 00:37:05,830
Aħna joħolqu oxxillatur.

704
00:37:05,830 --> 00:37:09,180
Jekk irridu nistabbilixxu l-volum, aħna
qabbad xejn għal GainNode,

705
00:37:09,180 --> 00:37:12,500
li stajna nagħmlu ma '.creategain.

706
00:37:12,500 --> 00:37:14,250
Li tistabbilixxi volum tiegħek.

707
00:37:14,250 --> 00:37:17,820
Inti tista 'tgħaddi dik fuq kwalunkwe
l-oħra options-- tajjeb,

708
00:37:17,820 --> 00:37:20,300
hekk sors buffer awdjo
node huwa fejn inti tista '

709
00:37:20,300 --> 00:37:23,660
jaħżnu MP3 li inti stajt mgħobbija fil.

710
00:37:23,660 --> 00:37:27,670
>> Filtru Biquad huwa għall-iffiltrar jekk
inti tixtieq li tieħu l-bażi out

711
00:37:27,670 --> 00:37:29,630
ta 'kanzunetta, jew xi ħaġa bħal dik.

712
00:37:29,630 --> 00:37:32,450
Alla jipprojbixxu inti tixtieq li tieħu
il-bażi out ta 'kanzunetta.

713
00:37:32,450 --> 00:37:36,980
U node AudioDestination huwa, għal darb'oħra,
bħal fejn finalizzazzjoni tagħna huwa.

714
00:37:36,980 --> 00:37:39,980
Jekk int qatt interessat li jaraw
l-għażliet possibbli differenti,

715
00:37:39,980 --> 00:37:45,190
biss jmorru għall-tab u let
l-auto komplet toħroġ.

716
00:37:45,190 --> 00:37:48,690
U jekk inti toħloq, inti ser tara l-
affarijiet differenti li inti tista 'toħloq.

717
00:37:48,690 --> 00:37:50,398
Tista 'toħloq dinamika
proċessuri iskrittura,

718
00:37:50,398 --> 00:37:52,940
I lanqas biss jafu dak li
hija, għat-taħlit mergers kanal

719
00:37:52,940 --> 00:37:55,930
u splitters kanal u dak kollu.

720
00:37:55,930 --> 00:37:56,430
Kessaħ.

721
00:37:56,430 --> 00:37:59,560

722
00:37:59,560 --> 00:38:01,390
>> Allura dan huwa biss
Eżempju ta 'pipeline.

723
00:38:01,390 --> 00:38:03,580
Allura aħna għandna tliet sorsi li ġejjin fil.

724
00:38:03,580 --> 00:38:06,830
Forsi dawn huma f'forom ta 'mewġ,
forsi dawn huma MP3s.

725
00:38:06,830 --> 00:38:08,740
Wieħed għaddej minn
filtru, tat xulxin

726
00:38:08,740 --> 00:38:12,404
jkollna mgħawġa ieħor
panning wieħed xellug u lemin.

727
00:38:12,404 --> 00:38:15,320
Tista 'tagħmel kull xorta ta' affarijiet u
dawn kollha jiksbu mħallta madwar flimkien,

728
00:38:15,320 --> 00:38:18,880
u mbagħad mill jasal l-awdjo
fl-aħħar, bħala d-destinazzjoni.

729
00:38:18,880 --> 00:38:22,720
Dan huwa eżempju ta 'x'jista' jsir iktar
ikkumplikat Web kodiċi Audio Dehra.

730
00:38:22,720 --> 00:38:26,720
Int ħolqien dawn kollha
oġġetti differenti dritt here--

731
00:38:26,720 --> 00:38:27,706
M'inix ċert ta 'dan.

732
00:38:27,706 --> 00:38:29,120
Le, ma zoom.

733
00:38:29,120 --> 00:38:29,620
KOLLOX SEW.

734
00:38:29,620 --> 00:38:31,257
>> SAM GREEN: You do Kontroll, Skrollja Up.

735
00:38:31,257 --> 00:38:32,590
HUGH ZABRISKIE: Kontroll Scroll--

736
00:38:32,590 --> 00:38:33,000
SAM GREEN: No, no.

737
00:38:33,000 --> 00:38:33,500
Control--

738
00:38:33,500 --> 00:38:36,540

739
00:38:36,540 --> 00:38:38,140
>> HUGH ZABRISKIE: Oh, Kontroll, Skrollja?

740
00:38:38,140 --> 00:38:38,780
Oh, gotcha.

741
00:38:38,780 --> 00:38:41,480
Yeah.

742
00:38:41,480 --> 00:38:42,240
Ara naqra, Nope, Nope.

743
00:38:42,240 --> 00:38:42,740
KOLLOX SEW.

744
00:38:42,740 --> 00:38:46,090
I mhux se tagħmel dan.

745
00:38:46,090 --> 00:38:48,300
>> Allura yeah, f'dan l-ewwel
taqsima hawn, inti tara

746
00:38:48,300 --> 00:38:52,720
aħna qed joħolqu dawn kollha differenti
lymph barra mill-kuntest.

747
00:38:52,720 --> 00:38:54,980
Aħna biss piecing minnhom
flimkien fit-tieni parti

748
00:38:54,980 --> 00:38:56,980
minn din il-funzjoni tissejjaħ Connect.

749
00:38:56,980 --> 00:38:58,830
Li verament importanti
funzjoni Web Audio.

750
00:38:58,830 --> 00:39:01,930
Dan ifisser biss ladarba inti ghamilt
xi ħaġa bil-ħoss fl node wieħed,

751
00:39:01,930 --> 00:39:03,705
tgħaddiha lill-node li jmiss.

752
00:39:03,705 --> 00:39:05,830
Allura aħna għandna l-sors, hija
jgħaqqad lill-analizzatur,

753
00:39:05,830 --> 00:39:09,140
l-analizzatur ma xi ħaġa ma 'dan,
din tmur għal distorsjoni, u l-bqija,

754
00:39:09,140 --> 00:39:12,725
u lejn id-destinazzjoni
fil-qiegħ dritt hawn.

755
00:39:12,725 --> 00:39:13,225
Kessaħ.

756
00:39:13,225 --> 00:39:14,640
OK, hekk aħna ser iżommu miexja fuq.

757
00:39:14,640 --> 00:39:17,180
>> Il pipeline-- darb'oħra, dawn
huma l-pajpijiet l-aktar komuni,

758
00:39:17,180 --> 00:39:21,300
hekk aħna nitkellmu dwar dawn l-affarijiet simili
distorsjoni, panning, dan kollu Jittieħed.

759
00:39:21,300 --> 00:39:24,280
Jekk int verament interessat
fl-użu affarijiet Pro Għodod,

760
00:39:24,280 --> 00:39:25,820
dawk probabbilment jinteressawk.

761
00:39:25,820 --> 00:39:27,740
Jekk le, forsi inti biss
tixtieq li jilagħbu l-ħoss,

762
00:39:27,740 --> 00:39:29,990
jew forsi inti biss tixtieq li
tistabbilixxi l-volum fuq il-ħoss.

763
00:39:29,990 --> 00:39:35,270
Dawk huma ż-żewġ tip l-aktar komuni
ta 'pajpijiet fil-produzzjoni awdjo.

764
00:39:35,270 --> 00:39:38,640
>> Għal darb'oħra, il-modi kif inti tista 'tieħu
fi bħala oscillator-- iva, ejja

765
00:39:38,640 --> 00:39:42,460
tagħmel l-demo ta 'dak id-dritt hawn.

766
00:39:42,460 --> 00:39:47,090

767
00:39:47,090 --> 00:39:52,225
Allura aħna qed tmur biex jinħoloq
kuntest awdjo sempliċi hawn,

768
00:39:52,225 --> 00:39:54,350
u minn li aħna qed tmur
biex joħolqu oxxillatur tagħna.

769
00:39:54,350 --> 00:39:58,620
Allura dan huwa, għal darb'oħra, aħna qed biss
ser sejħa Oħloq Oxxillatur.

770
00:39:58,620 --> 00:40:07,030
Aħna qed tmur biex jistabbilixxu frekwenza fuq
li, 440 Hertz, favoriti kulħadd.

771
00:40:07,030 --> 00:40:13,290
Imbagħad aħna jgħaqqdu li lejn id-destinazzjoni
point-- li huwa l-kelliem, hekk

772
00:40:13,290 --> 00:40:15,750
kuntest id-destinazzjoni.

773
00:40:15,750 --> 00:40:21,400
Fl-aħħarnett, aħna biss jgħidu, bidu żero
sekondi minn issa, u ma għandna ħoss?

774
00:40:21,400 --> 00:40:22,400
>> [Żarżir]

775
00:40:22,400 --> 00:40:24,980
>> HUGH ZABRISKIE: Here we go.

776
00:40:24,980 --> 00:40:25,940
Huwa biss mewġa sinusojdali.

777
00:40:25,940 --> 00:40:26,440
OK, berred.

778
00:40:26,440 --> 00:40:28,274
U allura aħna ser tieqaf dik.

779
00:40:28,274 --> 00:40:30,520
>> UDJENZA: Fejn ma
li feedback jiġu minn?

780
00:40:30,520 --> 00:40:31,250
>> HUGH ZABRISKIE: Il-feedback?

781
00:40:31,250 --> 00:40:32,458
Oh, probabbilment mikrofoni tagħna.

782
00:40:32,458 --> 00:40:34,221

783
00:40:34,221 --> 00:40:35,470
Allura yeah, dan huwa kif inti tagħmel dan.

784
00:40:35,470 --> 00:40:37,261
U fil-fatt, kieku kelli
żammha taħdem, inti

785
00:40:37,261 --> 00:40:39,540
jista 'jkollu l-frekwenza
valur kif huwa taħdem,

786
00:40:39,540 --> 00:40:43,320
hekk li l-ħaġa gost li jkollhom madwar.

787
00:40:43,320 --> 00:40:44,930
Kessaħ.

788
00:40:44,930 --> 00:40:46,600
Li dejjem waħda sabiħ biex tippreżenta.

789
00:40:46,600 --> 00:40:48,792
>> SAM GREEN: Aħna ma
jaħsbu dwar dan, ma we?

790
00:40:48,792 --> 00:40:50,500
HUGH ZABRISKIE: Yeah,
li l-waħda diżgustanti.

791
00:40:50,500 --> 00:40:53,249
Allura, buffer loading-- I ser juru
Eżempju ta 'dan fl-aħħar nett.

792
00:40:53,249 --> 00:40:55,090
Li tagħbija MP3.

793
00:40:55,090 --> 00:40:58,880
U l-mikrofonu, tuża biss funzjoni
imsejħa Navigator.getUserMedia ()

794
00:40:58,880 --> 00:41:03,240
li jitlob aċċess għall-utent tal
mikrofonu għal dik l-informazzjoni.

795
00:41:03,240 --> 00:41:05,610
>> Hawn filtrazzjoni, I ser
biss iżommu jiċċaqalqu minn dan.

796
00:41:05,610 --> 00:41:08,600
Dan huwa livell pjuttost għoli,
iżda filtri biss jippermetti li inti

797
00:41:08,600 --> 00:41:16,154
>> [Beeping]

798
00:41:16,154 --> 00:41:18,320
Filtrazzjoni tippermetti wkoll li inti
biex joħolqu affarijiet simili roża

799
00:41:18,320 --> 00:41:20,050
istorbju, l-istorbju kannella, ħoss abjad.

800
00:41:20,050 --> 00:41:24,330
Jekk inti tixtieq li toħloq ħoss pur, li
xi nies imħabba li mess mal-madwar,

801
00:41:24,330 --> 00:41:27,490
inti tista 'tuża Web Audio
filtrazzjoni biex tagħmel dan.

802
00:41:27,490 --> 00:41:30,039
>> Audio Panning-- hekk jimmaġina
jekk int bil-miktub logħba

803
00:41:30,039 --> 00:41:32,330
u trid li l-ħoss li
ħoss bħal huwa li ġejjin, bħal,

804
00:41:32,330 --> 00:41:36,090
isparar madwar l-iskrin, inti
jistgħu jużaw l panning tal-awdjo

805
00:41:36,090 --> 00:41:39,770
biex joħolqu dan it-tip ta 'konu,
li like-- huwa pjuttost mathy,

806
00:41:39,770 --> 00:41:41,850
iżda huwa attwalment verament
jiksaħ jekk inti ġġibu taħdem,

807
00:41:41,850 --> 00:41:44,500
u hemm xi tajba
tutorials fuqha I tista 'tibgħat inti.

808
00:41:44,500 --> 00:41:46,400
Bażikament, inti tista tip
tal toħloq il-ħoss

809
00:41:46,400 --> 00:41:50,480
ta 'xi ħaġa tmur permezz b'mod 3D.

810
00:41:50,480 --> 00:41:57,350
U jekk għandek interess DJ, inti tista
tibda taħlit u jaqsmu kanzunetti fading.

811
00:41:57,350 --> 00:42:01,260
>> Dan huwa biss ftit bażika ħafna
kodiċi, bażikament dak li għamilt qabel.

812
00:42:01,260 --> 00:42:06,140
Dan jistabbilixxi l-volum tal-
oxxillatur, hekk aħna joħolqu oxxillatur tagħna

813
00:42:06,140 --> 00:42:07,380
li joħloq l-mewġa.

814
00:42:07,380 --> 00:42:09,940
Aħna joħolqu GainNode tagħna,
sett frekwenza tagħna,

815
00:42:09,940 --> 00:42:14,170
u mbagħad waħħal l-ossillatur li l-
GainNode, li mbagħad bażikament bidliet

816
00:42:14,170 --> 00:42:16,760
kemm sinjal huwa permess permezz.

817
00:42:16,760 --> 00:42:20,467
Imma verament, huwa diġitali
ħaġa, dan huwa aktar just-- yeah.

818
00:42:20,467 --> 00:42:23,550
Li mhux dak li verament jiġri,
iżda li dak li jiġri fil-ħajja reali

819
00:42:23,550 --> 00:42:24,393
bi qligħ.

820
00:42:24,393 --> 00:42:27,258
>> UDJENZA: --quantization
tal-parametru volum?

821
00:42:27,258 --> 00:42:28,174
HUGH ZABRISKIE: Jiddispjacini?

822
00:42:28,174 --> 00:42:30,360
UDJENZA: Huwa ta '
parametru volum quantized?

823
00:42:30,360 --> 00:42:31,840
HUGH ZABRISKIE: Yeah.

824
00:42:31,840 --> 00:42:34,620
U dan huwa ħaġa waħda jien verament
defiċjenti fuq fl-għarfien tiegħi,

825
00:42:34,620 --> 00:42:38,010
kif jiksbu xogħlijiet fuq livell diġitali.

826
00:42:38,010 --> 00:42:40,140
Naf mal attwali
sinjali, huwa bażikament

827
00:42:40,140 --> 00:42:45,120
kontroll kemm int
amplifikazzjoni-sinjal.

828
00:42:45,120 --> 00:42:47,017
Allura, yeah.

829
00:42:47,017 --> 00:42:50,100
I ser nibaghtulek aktar informazzjoni dwar
li, minħabba I d jkun kurjużi fil-fatt

830
00:42:50,100 --> 00:42:51,099
tkun taf aktar dwar dan.

831
00:42:51,099 --> 00:42:54,090
Imma bażikament il-parametri
huma, wieħed huwa l-fold--

832
00:42:54,090 --> 00:42:59,690
l signal-- louder u żero ebda
sinjal, jew inti mhux se tisma 'kull ħoss.

833
00:42:59,690 --> 00:43:03,150
Aħna ser skip ħin demo għal dak għaliex
huwa bażikament dak li għamilt qabel.

834
00:43:03,150 --> 00:43:07,630
U għal darb'oħra, il-Context.Destination
huwa l-node destinazzjoni awdjo.

835
00:43:07,630 --> 00:43:08,360
Biża ', OK.

836
00:43:08,360 --> 00:43:10,470
>> Hekk jien ser tagħmel malajr żewġ demos.

837
00:43:10,470 --> 00:43:11,760
Kif aħna nagħmlu fil-ħin?

838
00:43:11,760 --> 00:43:12,640
>> SPEAKER 1: Madwar 10 minuti.

839
00:43:12,640 --> 00:43:13,130
>> HUGH ZABRISKIE: 10 minuti?

840
00:43:13,130 --> 00:43:13,630
Great!

841
00:43:13,630 --> 00:43:14,320
Tal-biża.

842
00:43:14,320 --> 00:43:19,010
>> Allura l-ewwel waħda jien ser
do, huwa msejjaħ kanzunetta favorita tiegħi.

843
00:43:19,010 --> 00:43:22,410
Allura din hija biss
ftit HTML JavaScript.

844
00:43:22,410 --> 00:43:25,510
Aħna ser ikollhom żewġ buttuni
fuq il-paġna play kanzunetta favorita tiegħi

845
00:43:25,510 --> 00:43:29,192
u jieqfu kanzunetta favorita tiegħi.

846
00:43:29,192 --> 00:43:30,180
I ser tbiddel dan.

847
00:43:30,180 --> 00:43:32,110
>> UDJENZA: Għatti mikrofonu tiegħek.

848
00:43:32,110 --> 00:43:33,430
>> HUGH ZABRISKIE: Yeah.

849
00:43:33,430 --> 00:43:36,300
U stajt mgħobbija fil hawn
b'kitba li basically--

850
00:43:36,300 --> 00:43:38,520
u dan huwa verament utli
għal tagħbija MP3,

851
00:43:38,520 --> 00:43:41,820
sabiex dan biss jagħmel
tagħbija mod MP3s aktar malajr.

852
00:43:41,820 --> 00:43:44,180
Huwa bażikament biss tgeżwir.

853
00:43:44,180 --> 00:43:48,737
Hija biss tagħmel il-proċess ta '
tagħbija fil MP3s ħafna aktar mgħaġġla,

854
00:43:48,737 --> 00:43:51,570
inkella inti qed tuża talba HTTP,
tip simili dak li kienu qed jagħmlu

855
00:43:51,570 --> 00:43:53,950
fuq il-biċċa attwali stabbiliti bl Server.

856
00:43:53,950 --> 00:43:55,950
Huwa tassew ikrah, inti
ma jridux jagħmlu dan.

857
00:43:55,950 --> 00:44:04,110
>> Allura dan Guy, Boris SMUs, kiteb verament
utli ftit għodda msejħa BufferLoader.

858
00:44:04,110 --> 00:44:08,780
Kulma għandek tagħmel huwa sempliċement tgħaddiha l
kuntest, inti tgħaddiha a list--

859
00:44:08,780 --> 00:44:11,327
jew, yeah, huwa f'lista JavaScript?

860
00:44:11,327 --> 00:44:12,160
SAM GREEN: Firxa.

861
00:44:12,160 --> 00:44:14,201
HUGH ZABRISKIE: Oh, huwa
firxa, li d-dritt.

862
00:44:14,201 --> 00:44:18,660
Huwa ta 'firxa ta' mogħdijiet
għall-fajls differenti.

863
00:44:18,660 --> 00:44:21,990
U allura inti tgħaddih funzjoni.

864
00:44:21,990 --> 00:44:25,530
Dan huwa l-callback konna nitkellmu
dwar b'tagħbija mhux sinkroniku.

865
00:44:25,530 --> 00:44:28,720
Li se tissejjaħ
ladarba l-fajls mgħobbija.

866
00:44:28,720 --> 00:44:33,780
U dik il-funzjoni li tissejjaħ meta
IT-fajl mgħobbija jieħu bħala perimetru

867
00:44:33,780 --> 00:44:35,840
firxa ta 'buffers mgħobbija.

868
00:44:35,840 --> 00:44:37,990
Allura li jseħħ hawnhekk.

869
00:44:37,990 --> 00:44:41,180
Bażikament, BufferList huwa
se tkun value-- wieħed

870
00:44:41,180 --> 00:44:46,380
jew li għaddej biex tkun firxa ta '
tul wieħed, li għandu fiha fl-indiċi

871
00:44:46,380 --> 00:44:51,320
żero fajl mgħobbija kollu tal-MP3.

872
00:44:51,320 --> 00:44:53,320
Allura dak I do meta I finish
tagħbija, I sempliċiment

873
00:44:53,320 --> 00:44:57,430
toħloq sors buffer, li
huwa node sors buffer awdjo.

874
00:44:57,430 --> 00:45:03,410
Il-pass li jmiss huwa I tagħbija fil-
source.buffer bħala l-buffer mgħobbija sħiħa

875
00:45:03,410 --> 00:45:06,740
mill-BufferList--
huwa ħafna ta buffers--

876
00:45:06,740 --> 00:45:10,255
u allura inti tqabbad awdjo
buffer lejn id-destinazzjoni.

877
00:45:10,255 --> 00:45:12,380
Allura dak li għaddej biex tagħmel
huwa biss sempliċement tpoġġi l-MP3

878
00:45:12,380 --> 00:45:15,260
straight sa l-output,
u tibda immedjatament

879
00:45:15,260 --> 00:45:18,010
fuq jkollna din is-sejħa.

880
00:45:18,010 --> 00:45:21,660
>> Kessaħ, so ejja naraw
dan jiġri fl-azzjoni.

881
00:45:21,660 --> 00:45:24,490
My [inaudible] hawn, ejja ara.

882
00:45:24,490 --> 00:45:26,430
Hekk jien biss se
tibda server bażiku.

883
00:45:26,430 --> 00:45:28,660
Dik xi ħaġa li
għandek bżonn tagħmel jekk int

884
00:45:28,660 --> 00:45:32,490
jagħmlu talbiet għal fajls tagħbija.

885
00:45:32,490 --> 00:45:34,140
Jien ser tibda server bażiku.

886
00:45:34,140 --> 00:45:38,200
Dan huwa bażikament kollu tiegħek
PSET dritt issa f'linja waħda,

887
00:45:38,200 --> 00:45:43,930
imma hija biss bidu
server fuq il-port 80/80.

888
00:45:43,930 --> 00:45:47,300
Allura aħna jmorru fuq hawn, aħna
se tagħbija 80/80,

889
00:45:47,300 --> 00:45:49,110
aħna qed tmur biex tmur kanzunetta favorita tiegħi.

890
00:45:49,110 --> 00:45:51,660
Mela jekk I hit "Play tiegħi
kanzunetta favorita "dritt issa,

891
00:45:51,660 --> 00:45:53,964
li għaddej biex tagħbija tiegħi
kanzunetta favorita u play it--

892
00:45:53,964 --> 00:45:55,880
[MUSIC - IL EAGLES, "LIFE FIL-FAST
 LANE "]

893
00:45:55,880 --> 00:46:00,490
--which jiġri li jkun "Ħajja fl
il Lane Fast "minn The Eagles.

894
00:46:00,490 --> 00:46:06,346
Issa, I jistgħu hit "Ieqaf tiegħi
kanzunetta favorita "u replay.

895
00:46:06,346 --> 00:46:09,160
>> [MUSIC - IL EAGLES, "LIFE FIL-FAST
 LANE "]

896
00:46:09,160 --> 00:46:18,340
>> U jekk immur fuq console, minħabba
I użati varjabbli globali minn hawn

897
00:46:18,340 --> 00:46:23,390
li jżommu rekord ta 'dan il-valur, fil-fatt
issa se tiġi rikonoxxuta fl-console.

898
00:46:23,390 --> 00:46:25,160
Għalhekk l-awto-joħloq għalija.

899
00:46:25,160 --> 00:46:29,991
Allura dak hu li playing dritt issa,
u I tista 'sempliċiment sejħa source.stop ()

900
00:46:29,991 --> 00:46:30,490
fuq dan.

901
00:46:30,490 --> 00:46:34,930

902
00:46:34,930 --> 00:46:35,860
Well, inti taf liema?

903
00:46:35,860 --> 00:46:39,760
Just hekk inti guys smajt dan
song-- inti tista jirrikonoxxu din il-kanzunetta.

904
00:46:39,760 --> 00:46:41,801
>> [MUSIC - Rick Astley, "QATT gonna jagħti
 INTI UP "]

905
00:46:41,801 --> 00:46:42,299

906
00:46:42,299 --> 00:46:44,215
[MUSIC - IL EAGLES, "LIFE FIL-FAST
 LANE "]

907
00:46:44,215 --> 00:46:46,195
Imxejna issa kollha ġew Rickrolled.

908
00:46:46,195 --> 00:46:50,155
OK, kbira, jimxu fuq.

909
00:46:50,155 --> 00:46:51,160
Kessaħ.

910
00:46:51,160 --> 00:46:54,554
Allura dan huwa bażikament eżempju ta '
kemm inti tista 'tagħbija MP3 file--

911
00:46:54,554 --> 00:46:56,470
[MUSIC - IL EAGLES, "LIFE FIL-FAST
 LANE "]

912
00:46:56,470 --> 00:46:59,590
--and play, u waqfien u jibda dan.

913
00:46:59,590 --> 00:47:03,008
I seta 'jsir ħafna aktar [inaudible]

914
00:47:03,008 --> 00:47:07,570
>> L-aħħar wieħed I ser tagħmel hu,
I ser nuruk [inaudible].

915
00:47:07,570 --> 00:47:18,070
>> [Daqq tal-mużika]

916
00:47:18,070 --> 00:47:21,800
>> Huwa simili, ogg.wave.mp3.

917
00:47:21,800 --> 00:47:26,450
I think, jekk niftakar sewwa,
Stajt run fis xi kwistjonijiet mal .m4a,

918
00:47:26,450 --> 00:47:27,721
imma jien mhux ċert dwar dan.

919
00:47:27,721 --> 00:47:28,470
I think mp3.wave--

920
00:47:28,470 --> 00:47:28,930

921
00:47:28,930 --> 00:47:30,971
>> [MUSIC - Rick Astley, "QATT gonna jagħti
 INTI UP "]

922
00:47:30,971 --> 00:47:35,930

923
00:47:35,930 --> 00:47:36,500
>> OK, kbir.

924
00:47:36,500 --> 00:47:37,625
I ma għandu jkollhom qal dan.

925
00:47:37,625 --> 00:47:40,570
Xorta waħda, bonjour.

926
00:47:40,570 --> 00:47:43,430

927
00:47:43,430 --> 00:47:45,490
Allura aħna għandna dan miftuħa.

928
00:47:45,490 --> 00:47:52,320
Allura issa kollha li nagħmel huwa, I bażikament maħluqa
sintassi bażika għall-ħolqien mużika.

929
00:47:52,320 --> 00:47:57,610
Mela jekk jien tagħmel xi ħaġa simili, żid g4
fl-1 ta 2, dak li tfisser hija li,

930
00:47:57,610 --> 00:48:00,950
żid in-nota piano, G4,
li huwa r-raba G

931
00:48:00,950 --> 00:48:02,680
fuq il-pjanu mill-qiegħ.

932
00:48:02,680 --> 00:48:05,930
Allura dan huwa tip ta 'MIDI jitkellmu,
hekk għal dawk li huma bbażati fuq mużika,

933
00:48:05,930 --> 00:48:07,860
dan huwa jinnota biss MIDI.

934
00:48:07,860 --> 00:48:10,090
>> UDJENZA: Dik hija l-G
tal-Lvant C, right?

935
00:48:10,090 --> 00:48:11,840
>> HUGH ZABRISKIE: Dan huwa l-G
hawn fuq Nofsani C, li d-dritt.

936
00:48:11,840 --> 00:48:12,470
>> UDJENZA: Fuq Nofsani C.

937
00:48:12,470 --> 00:48:13,345
>> HUGH ZABRISKIE: Yeah.

938
00:48:13,345 --> 00:48:14,340
Attwalment, iva.

939
00:48:14,340 --> 00:48:16,131
I think I attwalment magħmula
waħda [inaudible],

940
00:48:16,131 --> 00:48:18,860
għalhekk dan jista 'jkun ottava aktar minn dak.

941
00:48:18,860 --> 00:48:20,070
Mela ejja ara.

942
00:48:20,070 --> 00:48:21,152
Jekk I hit Play--

943
00:48:21,152 --> 00:48:22,110
[NOTA PJANU ripetittivi]

944
00:48:22,110 --> 00:48:23,200
--we're se tisma li.

945
00:48:23,200 --> 00:48:25,700
L-idea hija li topera
bħad linja tal-kmand ikun,

946
00:48:25,700 --> 00:48:27,510
hekk jekk I jitla 'u' l isfel
fuq it-tastiera tiegħi, inti

947
00:48:27,510 --> 00:48:31,550
tista 'tmur lura għall-preċedenti
jikkmanda, li huwa pjuttost utli.

948
00:48:31,550 --> 00:48:35,136
U hawn taħt hija lista tiegħi ta 'binarji,
li huma kollha timxi fuq linja.

949
00:48:35,136 --> 00:48:38,260
>> UDJENZA: Inti kienu qed jassumu l-
Keyboard 88 ewlenin fuq dik, id-dritt?

950
00:48:38,260 --> 00:48:41,051
>> HUGH ZABRISKIE: Il-kwistjoni kienet,
am I jassumi tastiera 88-ewlenin,

951
00:48:41,051 --> 00:48:41,990
u iva, I am.

952
00:48:41,990 --> 00:48:45,030
Dak li għamilt hija I
bażikament ħadu 88 kampjuni

953
00:48:45,030 --> 00:48:46,970
tal-pjanu, waħda għal kull nota.

954
00:48:46,970 --> 00:48:49,180
U hekk kull darba li inti
tisma 'nota minn issa',

955
00:48:49,180 --> 00:48:57,550
li huwa attwalment loop li jistenna
like-- dan huwa jkollna tindaqq fuq loop,

956
00:48:57,550 --> 00:49:00,120
hekk għal kull nota, dan qed taħdem.

957
00:49:00,120 --> 00:49:02,860
Dak li jiġri huwa, I
toħloq buffer mill-ġdid,

958
00:49:02,860 --> 00:49:06,010
I joħolqu node qligħ li tiffissa l-volum.

959
00:49:06,010 --> 00:49:08,240
Dan biss verament
mod kkumplikata ta 'tgħid I

960
00:49:08,240 --> 00:49:10,550
jaħżnu l-buffer f 'source.buffer.

961
00:49:10,550 --> 00:49:13,160
I tagħtiha l-qligħ, I
qabbad lill-qligħ,

962
00:49:13,160 --> 00:49:15,576
il-qligħ huwa konness mal-
output, u mbagħad I play.

963
00:49:15,576 --> 00:49:20,735
Allura li huwa tip tal-proċess
ta 'teħid f'sors buffer.

964
00:49:20,735 --> 00:49:24,820
>> UDJENZA: Tista realtà din
ħoss niexef u jagħmilha wet [inaudible]?

965
00:49:24,820 --> 00:49:26,260
>> HUGH ZABRISKIE: Tista ', yeah.

966
00:49:26,260 --> 00:49:29,260
Hemm-verb mill-ġdid, hemm
dewmien, tfixkil.

967
00:49:29,260 --> 00:49:33,260
Tista 'bażikament tpoġġi xejn
bejn f'dak sandwich of-- ukoll,

968
00:49:33,260 --> 00:49:37,660
pipeline hija metafora aħjar,
imma int tista 'żżid kwalunkwe ħaġa f'dak l.

969
00:49:37,660 --> 00:49:38,200
Kessaħ.

970
00:49:38,200 --> 00:49:40,280
>> So I ser jintemm l-demo
hawn biex jagħtuk sens

971
00:49:40,280 --> 00:49:46,390
ta 'ftit in-numru kbir ħafna ta' drabi li int
tista 'taħdem dik il-funzjoni kollha f'daqqa.

972
00:49:46,390 --> 00:49:49,280
So I m ser tneħħi dan.

973
00:49:49,280 --> 00:49:59,110
Jien ser toħloq ġeneratur that--
bażikament dak does-- dan huwa verament

974
00:49:59,110 --> 00:50:04,220
tip ta 'syntax-- kkumplikata iżda huwa
se jiġġeneraw noti fuq il-fly,

975
00:50:04,220 --> 00:50:06,601
u biss tibda playing
minnhom kif jevalwahom.

976
00:50:06,601 --> 00:50:07,392
[PJANU INTERPOSING]

977
00:50:07,392 --> 00:50:10,990

978
00:50:10,990 --> 00:50:12,817
>> Allura nistgħu biss tagħmel mużika ftit hawn.

979
00:50:12,817 --> 00:50:13,608
[PJANU INTERPOSING]

980
00:50:13,608 --> 00:50:39,570

981
00:50:39,570 --> 00:50:41,470
>> Allura dak li dan il-kmand
ma, per eżempju, huwa

982
00:50:41,470 --> 00:50:46,910
hija tieħu dawk tliet noti għall-
piano u mbagħad jpoġġihom fuq B3.

983
00:50:46,910 --> 00:50:48,660
Dan sintassi jista 'jagħmel
ftit sens aktar

984
00:50:48,660 --> 00:50:50,590
lil dawk li jkollhom
isfond mużika hawn.

985
00:50:50,590 --> 00:50:55,180

986
00:50:55,180 --> 00:50:56,551
>> I tista 'żżid kick drum.

987
00:50:56,551 --> 00:50:57,050
Nista--

988
00:50:57,050 --> 00:50:58,048
>> [INTERPOSING STRUMENTI]

989
00:50:58,048 --> 00:50:59,256
>> --just play madwar ma 'dak.

990
00:50:59,256 --> 00:51:12,519

991
00:51:12,519 --> 00:51:13,474
>> Allura inti tista 'make--

992
00:51:13,474 --> 00:51:14,515
[INTERPOSING STRUMENTI]

993
00:51:14,515 --> 00:51:15,513
Li wieħed l-ftit aktar annoying.

994
00:51:15,513 --> 00:51:16,554
[INTERPOSING STRUMENTI]

995
00:51:16,554 --> 00:51:26,491

996
00:51:26,491 --> 00:51:30,981
>> Allura li saltwarjament żżid Cymbal xott
fuq kull nota 16, bil-16%

997
00:51:30,981 --> 00:51:31,481
[Inaudible].

998
00:51:31,481 --> 00:51:32,522
>> [INTERPOSING STRUMENTI]

999
00:51:32,522 --> 00:51:40,962

1000
00:51:40,962 --> 00:51:50,400
>> Yeah, sabiex il-mod kif dan
works-- huwa dejjem fil 4: 4.

1001
00:51:50,400 --> 00:51:51,441
[INTERPOSING STRUMENTI]

1002
00:51:51,441 --> 00:52:06,910

1003
00:52:06,910 --> 00:52:10,902
>> Yeah, hekk l-erba 'kwarti, u 16/8.

1004
00:52:10,902 --> 00:52:14,851

1005
00:52:14,851 --> 00:52:15,892
[INTERPOSING STRUMENTI]

1006
00:52:15,892 --> 00:52:27,970

1007
00:52:27,970 --> 00:52:33,780
>> Allura fuq medja, ikollok 60%
tal hits fuq in-noti 16TH.

1008
00:52:33,780 --> 00:52:35,990
>> Anyways, dan kien biss
tip ta 'juru off

1009
00:52:35,990 --> 00:52:39,780
uħud mill-affarijiet li inti tista '
jibnu bil-Web Audio API.

1010
00:52:39,780 --> 00:52:43,840
Huwa tassew qawwija, huwa verament mgħaġġel,
u inti tista 'tagħmel ħafna affarijiet jibred

1011
00:52:43,840 --> 00:52:44,340
magħha.

1012
00:52:44,340 --> 00:52:51,260
Għalhekk għal darb'oħra, xi mistoqsijiet li għandek,
email myself-- Hugh-- jew Sam,

1013
00:52:51,260 --> 00:52:55,869
u onestament, Google għandha
ton ta 'riżorsi tajbin.

1014
00:52:55,869 --> 00:52:56,660
Kwalunkwe aħħar kwistjonijiet?

1015
00:52:56,660 --> 00:52:57,970
Yeah.

1016
00:52:57,970 --> 00:53:00,790
>> UDJENZA: Allura inti tista 'aċċess
il-mikrofonu built-in.

1017
00:53:00,790 --> 00:53:03,089
X'jiġri jekk int riedu
użu ta 'mikrofonu aħjar?

1018
00:53:03,089 --> 00:53:05,380
HUGH ZABRISKIE: Jekk int riedu
għall-użu mikrofonu aħjar?

1019
00:53:05,380 --> 00:53:11,320
Għalhekk għal darb'oħra, dan huwa parti mill-
estrazzjoni bejn Chrome

1020
00:53:11,320 --> 00:53:12,950
u l-bqija tal-kompjuter tiegħek.

1021
00:53:12,950 --> 00:53:18,950
Sakemm huwa disponibbli permezz
API, bħal Web MIDI API,

1022
00:53:18,950 --> 00:53:22,030
inti tista 'probabbilment issib xi hacks,
iżda ġeneralment mhux bħala fattibbli.

1023
00:53:22,030 --> 00:53:25,300
>> SAM GREEN: Tista 'also--
l-Chrome jaf

1024
00:53:25,300 --> 00:53:28,820
huwa dak mikrofonu default tiegħek
huwa, u dan aċċessi li.

1025
00:53:28,820 --> 00:53:33,410
Mela jekk kellek mikrofonu inti tista
stabbiliti bħala mikrofonu default kompjuter,

1026
00:53:33,410 --> 00:53:35,990
inti tista 'aċċess dan il-mod
u x'aktarx li taħdem.

1027
00:53:35,990 --> 00:53:37,490
HUGH ZABRISKIE: Li l-punt tajjeb.

1028
00:53:37,490 --> 00:53:39,656
Stajt qatt ma pprovaw li, iżda
inti tista 'tkun kapaċi tip

1029
00:53:39,656 --> 00:53:45,700
of-- jekk inti idawwru l-kelliem input,
inti tista 'tkun kapaċi li jagħmlu dan, yeah.

1030
00:53:45,700 --> 00:53:48,360
>> Kwalunkwe aħħar kwistjonijiet?

1031
00:53:48,360 --> 00:53:49,340
Kessaħ.

1032
00:53:49,340 --> 00:53:51,680
Well nirringrazzjak guys
tant għall-ħars.

1033
00:53:51,680 --> 00:53:52,199
Jien Hugh.

1034
00:53:52,199 --> 00:53:52,990
SAM GREEN: Ninsab Sam.

1035
00:53:52,990 --> 00:53:55,410
HUGH ZABRISKIE: U dan huwa CS50.

1036
00:53:55,410 --> 00:53:56,767