Asynchronous yog qhov zoo tshaj plaws thaum ua cov lus thov hauv qab no:
- I/O bound thov. Piv txwv li: sau ntawv / nyeem ntawv rau cov ntaub ntawv lossis cov ntaub ntawv, ua API hu, hu rau kho vajtse xws li tshuab luam ntawv thiab lwm yam.
- CPU bound thov (yuav tsum tau CPU sij hawm).
Vim li cas peb thiaj xav tau asynchronous programming?
Asynchronous coding feem ntau txhais tau tias koj yuav tsum tau ntau cov xov koj tus lejQhov no txhais tau tias koj yuav tsum pib lwm txoj xov uas tuaj yeem khiav ntawm koj tus kheej ntawm koj txoj haujlwm tseem ceeb. Qhov no feem ntau tsim nyog vim tias, piv txwv li, tos kev sib txuas lus kom ua tiav tag nrho cov xov uas tos tsis tau khiav.
Qhov twg yog qhov laj thawj zoo tshaj los siv kev ua asynchronous?
Asynchronous loops yog qhov tsim nyog thaum muaj ntau qhov kev cuam tshuam los yog thaum cov haujlwm hauv lub voj voog nyuajTab sis rau cov haujlwm yooj yim xws li iterating los ntawm ib qho me me, muaj tsis muaj laj thawj los cuam tshuam ntau yam los ntawm kev siv lub luag haujlwm recursive complex.
Thaum twg koj yuav siv asynchronous ua?
Asynchronous ua yog qhov zoo tshaj plaws thaum koj txoj kev yog I / O, network-bound, los yog ntev-khiav thiab parallelizable. Lwm qhov txiaj ntsig ntawm qhov kev txiav txim asynchronous yog tias nws tuaj yeem raug tshem tawm yooj yim dua los ntawm tus neeg siv dua li qhov kev thov synchronous.
Yam khoom twg hauv qab no siv asynchronous programming?
Ib qho ntawm APIs yooj yim tshaj plaws uas Dart muaj rau asynchronous programming yog futures - khoom ntawm hom Yav Tom Ntej. Rau feem ntau, Dart lub neej yav tom ntej zoo ib yam li yav tom ntej lossis cog lus APIs pom hauv lwm hom lus. Kab lus no tham txog cov ntsiab lus tom qab Dart yav tom ntej thiab qhia koj yuav ua li cas siv Future API.
