Yuav ua li cas yog ib qho yooj yim luam JavaScript?
Yuav ua li cas yog ib qho yooj yim luam JavaScript?

Video: Yuav ua li cas yog ib qho yooj yim luam JavaScript?

Video: Yuav ua li cas yog ib qho yooj yim luam JavaScript?
Video: Yuav Ua li Cas Koj Thiaj Muaj Nyiaj 2024, Hlis ntuj nqeg
Anonim

Daim ntawv loj yog me ntsis-wise luam ntawm ib yam khoom. Ib yam khoom tshiab yog tsim uas muaj qhov tseeb luam ntawm qhov tseem ceeb hauv qhov khoom qub. Yog hais tias ib qho ntawm cov teb ntawm cov khoom yog xa mus rau lwm yam khoom, tsuas yog qhov chaw nyob siv luam piv txwv li, tsuas yog lub cim xeeb chaw nyob luam.

Ua raws li qhov no hauv kev txiav txim siab, dab tsi yog daim ntawv ntiav hauv JavaScript?

Daim ntawv loj yog me ntsis-wise luam ntawm ib yam khoom. Ib yam khoom tshiab yog tsim uas muaj qhov tseeb luam ntawm qhov tseem ceeb hauv qhov khoom qub. Yog hais tias ib qho ntawm cov teb ntawm cov khoom yog xa mus rau lwm yam khoom, tsuas yog qhov chaw nyob siv luam piv txwv li, tsuas yog lub cim xeeb chaw nyob luam.

Qhov thib ob, daim ntawv ntiav ntiav ntawm ib qho array yog dab tsi? A daim ntawv loj ntawm ib qho Array luam tsuas yog cov ntsiab lus ntawm cov Array , seb lawv yog hom siv lossis hom nqi, tab sis nws tsis yog luam cov khoom uas cov ntaub ntawv xa mus. Cov ntaub ntawv hauv qhov tshiab Array taw tes rau tib yam khoom uas cov ntaub ntawv nyob rau hauv thawj Array taw tes rau.

Yog li ntawd, dab tsi yog daim ntawv sib sib zog nqus thiab daim ntawv ntiav hauv JavaScript?

A daim ntawv sib sib zog nqus txhais tau hais tias tag nrho cov txiaj ntsig ntawm qhov hloov pauv tshiab yog luam thiab disconnected los ntawm tus thawj variable. A daim ntawv loj txhais tau hais tias qee yam (sub-) cov nqi tseem txuas nrog rau qhov hloov pauv qub. Kom to taub tiag tiag luam , koj yuav tsum tau mus rau hauv li cas JavaScript khaws cov nqi.

Vim li cas peb thiaj xav tau daim ntawv me me?

Thaum twg peb siv lub neej ntawd ua raws li txoj kev clone peb tau daim ntawv loj ntawm cov khoom txhais tau tias nws tsim cov piv txwv tshiab thiab cov ntawv luam tag nrho cov teb ntawm cov khoom rau qhov piv txwv tshiab thiab rov qab los ua yam khoom, peb xav tau kom meej meej muab nws rov qab rau peb cov khoom qub. Qhov no yog daim ntawv loj ntawm qhov khoom.

Pom zoo: