Cov txheej txheem:
- Thaum twg koj yuav tsum siv lub ntsiab tsis muaj?
- Puas yog kev xyaum phem rov qab tsis tau txhais?
- Is null==undefined?
- Vim li cas null==undefined is true?
Video: Kuv yuav tsum siv null lossis tsis txhais?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Tsuas siv null yog tias koj xav qhia meej txog tus nqi ntawm qhov sib txawv li "tsis muaj nqi". Raws li @com2gz hais tias: null yog siv los txhais ib yam dab tsi programmatically khoob. undefined yog txhais tau hais tias qhov kev siv tsis muaj nyob. Tus nqi tsis muaj nuj nqis muaj qhov txhais tau hais tias "tsis muaj dab tsi ".
Thaum twg koj yuav tsum siv lub ntsiab tsis muaj?
Thaum qhov sib txawv lossis cov cuab yeej ntawm ib qho khoom tsis muaj tus nqi nws yog undefined, thiab rau tus nqi yuav tsis muaj nuj nqis koj yuav tsum muab nws tus nqi null. Raws li qhov sib txawv twb tsis muaj nuj nqis nws yog kiag li tsis muaj ntsiab lus nyob rau hauv tshaj tawm hais tias dua nrog rau lwm yam uas thaum kawg muaj lub ntsiab lus.
Puas yog kev xyaum phem rov qab tsis tau txhais?
A muaj nuj nqi rov qab tsis tau txhais yog tias tus nqi tsis rov qab. Nco tseg: Thaum koj tuaj yeem siv tsis tau txhais ua tus cim (lub npe hloov pauv) hauv txhua qhov uas tsis yog lub ntiaj teb cov peev txheej (vim tias tsis tau txhais tsis yog ib lo lus tshwj tseg), ua li ntawd yog lub tswv yim phem heev uas yuav ua rau koj cov cai nyuaj rau kev tswj thiab kho qhov teeb meem.
Is null==undefined?
null yog tus nqi muab. Txhais tau tias nothing. undefined txhais tau hais tias qhov sib txawv tau tshaj tawm tab sis tseem tsis tau txhais.
Vim li cas null==undefined is true?
Tus==tus neeg teb xov tooj sib piv tsis txheeb xyuas hom. null thiab undefined ob qho tib si rov qab tsis raug. Tias yog vim li cas koj txoj cai yog tiag tiag tshuaj xyuas yog qhov cuav yog sib npaug. Txawm li cas los lawv hom tsis sib npaug.
Pom zoo:
Kuv yuav tsum siv roj av lead lossis tsis muaj lead?
Tsheb tsim rau cov roj txhuas tsis ua haujlwm zoo nrog cov hloov pauv niaj hnub no. Cov hlau lead yog xav tau los tiv thaiv cov tebchaw hauv cov roj li qub thiab tsis muaj nws, cov cav qub tuaj yeem raug kev puas tsuaj loj thiab hnav . Qhov twg yog qhov zoo tshaj plaws tsis muaj txhuas lossis cov roj txhuas?
Thaum twg kuv yuav tsum siv tsis yog lossis ib qho?
Nco ntsoov, tsis yog feem ntau siv thaum ob qho kev xaiv tsis tau. Ob leeg nyiam siv rau hauv txoj kev zoo, thaum ib qho kev xaiv yuav raug xaiv. Yog hais tias koj tsis meej pem nrog ob lo lus no, tsis txhob txhawj! Thaum twg siv ob lossis tsis nyob hauv kab lus?
Kuv yuav tsum siv kuv lub hnub qub tsis muaj dab tsi?
Nws pom zoo kom koj siv koj Masterless Stardust los yuav ob qho tib si Intertwined thiab Acquaint Fates. Txoj hmoo yog yam khoom uas koj siv tau los yob rau kev hu . Kuv yuav ua li cas nrog tus tswv tsis muaj Stardust? Tsuas yog tam sim no siv rau Masterless Stardust yog pauv nws rau lwm yam khoom hauv Paimon's Bargains khw.
Kuv puas yuav lees txais lossis tsis lees yuav tus vajntxwv uas tsis muaj hnub tuag?
Yog koj tsis kam - koj tawm tsam nws, yog koj lees txais koj tuaj yeem hla nws, lossis tseem tuaj yeem tawm tsam nws yog tias koj nrog nws tham dua. P.S. Koj tuaj yeem sim tua nws thiab yog tias koj ua tsis tau tsuas yog hla . Yuav ua li cas yog tias koj tsis kam ua vajntxwv uas tsis muaj hnub tuag?
Kuv yuav tsum siv nco lossis ms rau kuv tus kheej?
"Neeg" yuav tsum siv thaum hais tus hluas, tsis tau yuav poj niam. Feem ntau cov poj niam laus uas tsis tau sib yuav nyiam mus los ntawm "Ms.," txawm hais tias qhov no feem ntau los ntawm tus kheej nyiam. Yog koj tsis paub meej ces yeej tsis mob nug!
