Tshooj JavaScript laub / pop

JavaScript tsis pawg, tab sis muaj ib tug array uas yuav siv tau raws li ib pawg. Nyob rau tib lub sij hawm, txoj kev ntawm manipulating JavaScript array ntawm laub / pop, yuav muaj nyob rau ntawm lawv pov tseg pawg, thiab ib tug array ntawm lawv tus kheej cov ntaub ntawv lub koom haum.

Raws li ib tug thawj approximation arrays - qhov no yog ib tug paub thiab nrov qauv ntaub ntawv no. Tab sis ua hauj lwm nrog lawv raws li ib pawg muab lawv tsis xam pom tau ntawm cov lus syntax. Ntxiv / Hmong ntawm JavaScript laub / pop mus xaus los yog unshift / hloov mus rau sab saum toj tsis tau tsuas yog yooj yim, tab sis kuj cov tswv yim.

siv txoj kev

Lub array yuav Iwj nrog tshiab ntsiab siv cov qauv laub. Cov tshwm sim ntawm cov qauv no yog lub xov tooj tshiab ntawm hais nyob rau hauv lub array. Cov rov qab txoj kev - lub pop txoj kev muaj tsis muaj tsis, tab sis muab raws li cov kev tshwm sim ntawm lub xeem caij ntawm lub array.

Raws li nram no los ntawm cov lus syntax thiab logic arrays yuav ua hauj lwm nrog txhua yam ntawm cov ntaub ntawv.

JavaScript laub khoom - nonsense los yog kev kawm?

browser lus yog tsis inferior mus rau lawv ntxiv "free" lug txhawb cov miv nyob rau hauv kev sib hwm ntawm cov kwv-taw qhia kom paub programming, uas yog, tib lub ua rau nws tau los mus tsim tej yam khoom. Yog li lo lus tseem ceeb denoting ib yam dab tsi hais txog cov PLO muaj.

Feem ntau hais lus, qhov tseeb hais tias muaj nyob rau hauv JavaScript, kom deb li deb tsis muaj nyiaj yuav muaj tej yam "free" los ntawm qhov browser lus. Tus ntau thawj - cov creation ntawm tus kwv no - nws yog ib lub programmer ob txhais tes, pib nrog tus kwv lub npe.

JavaScript txoj kev pop & thawb thaum siv tej khoom muab cov muaj peev xwm tsim multi-functional khoom nyob rau hauv lub literal siab ntawm lo lus.

Piv txwv li, muaj ob peb yam tab sis txawv nplooj ntawv (khoom uas tsis muaj feem xyuam rau txhua lwm yam lub logic ntawm kev sib tham), koj muaj peev xwm siv lub suab nyob rau hauv lawv cov qhua. Tso cov pawg (ib tug array) los ntawm laub pib phab kwv (ib tug qhua tuaj), muab nws ib tug xaiv ntawm kev txiav txim.

Tom ntej no thawb rau sab saum toj ntawm nplooj mus rau qhov chaw tus kwv, uas yog xaiv los ntawm cov qhua. Rollback pop rov qab nws rov qab. Txav mus - tom ntej no laub, thiab thiaj li cov kev sib tham yuav tsum tsim nyob rau ntawm qhov tam sim no cov qhua. Qhov no yuav pab tau raws li ib tug tsim tawm nyob rau hauv cov nqe lus ntawm kev kawm txawj thiab txheeb cais, thiab muab navigation nyob rau hauv lub tam sim no kev sib kho ntawm lub site.

Pawg, thiab ib tug array ntawm cov ntaub ntawv koom haum

Muaj ntau ntau yam uas ua yuav tsum tau ntau yam kev xaiv. Yog hais tias koj xav siv ib tug txheej yog hais tias los yog cov ntaub ntawv daim ntawv qhia, uas koj tau txais ib tug loj, ntev thiab branched "lam ua" tej yam kev mob.

Nyob rau hauv kev, nws tsis yog ib tug phem daws, tiam sis thaum koj xav hloov ib yam dab tsi, tau ntev nco ntsoov dab tsi rau hauv lub zwj ceeb ntawm yuav ua li cas tau, thiab cov algorithm yuav nyeem tsis tau, thiab feem ntau tsis kaj siab, yuav ua tau ib qhov chaw ntawm nyuaj mus ntes kom raug.

Nrog kev pab los ntawm lub teeb nyob rau hauv yuav luag txhua tus neeg mob, koj muaj peev xwm ua tau yooj yim.

Muaj yog ib qho teeb meem: koj yuav tsum xaiv ib tug neeg muab kev pab los ntawm cov pua pua muaj. Txhua artist yuav ua ib yam dab tsi tawm ntawm peb txoj hauj lwm (los ntawm ib mus rau peb nyob rau hauv tej thaum lawv tseem):

• t - ua txij nkawm;
• s - tau siab nqa tawm kho;
• kuv - muaj cai los mus ua kom warranty kho.

Yuav kom sai sai xaiv cov Executive Order nrog rau txoj kev zoo (hom ua hauj lwm), koj yuav ua li cas peb ua hauj lwm JavaScript laub thiab hauj lwm ua ke array rau hauv ib txoj hlua.

Nrhiav nyob rau kab nyob rau hauv ib tug kab yog ib txwm dlaim phaj tshaj qhov ntau tej yam kev mob. Qhov no yog ib tug yooj yim cov ntaub ntawv ntawm xwb peb nyob rau peb xaiv, tab sis txawm no yuav muaj ntau yam ntau code tshaj nyob rau hauv ib tug sib piv ntawm cov tsuas yog ob tug kab.