Video: Dab tsi yog tus cwj pwm?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Feem ntau, ib tus cwj pwm yog ib yam khoom los yog yam ntxwv. Xim, piv txwv li, yog ib qho tus cwj pwm ntawm koj cov plaub hau. Hauv Hypertext Markup Language (HTML), ib tus cwj pwm yog ib tug yam ntxwv ntawm ib nplooj keeb, xws li ib tug font. Ib tus neeg siv HTML tuaj yeem teeb tsa font yam ntxwv , xws li qhov loj me thiab xim, rau qhov sib txawv.
Ib yam li ntawd, koj tuaj yeem nug, qhov piv txwv ntawm tus cwj pwm yog dab tsi?
tus cwj pwm . Yam ntxwv txhais tau tias yog ib tug zoo los yog yam ntxwv ntawm ib tug neeg, qhov chaw los yog yam. Kev txawj ntse, ntxim nyiam thiab kev lom zem yog txhua tus piv txwv ntawm ib tus cwj pwm.
Tsis tas li ntawd, dab tsi yog attribute hom? Ib yam hom txhais qhia cov tus cwj pwm syntax thiab li cas yam ntxwv ntawm qhov ntawd hom muab piv thiab txheeb. Cov yam hom nyob rau hauv cov directory tsim ib chav kawm hierarchy. Piv txwv li, "commonName" yam hom yog ib tug subclass ntawm "lub npe" yam hom.
Kuj kom paub, dab tsi yog tus cwj pwm hauv nws?
Hauv kev suav, ib tus cwj pwm yog ib qho kev qhia tshwj xeeb uas txhais cov khoom ntawm ib yam khoom, khoom, lossis cov ntaub ntawv. Nws kuj tseem tuaj yeem xa mus lossis teeb tsa tus nqi tshwj xeeb rau ib qho piv txwv ntawm qhov ntawd. Rau clarity, yam ntxwv yuav tsum raug suav hais tias yog metadata ntau dua. Ib tus cwj pwm yog nquag thiab feem ntau yog cov khoom ntawm ib qho khoom.
Dab tsi yog qhov zoo tshaj plaws txhais ntawm cov cwj pwm?
Ib tus cwj pwm yog ib tug zoo los yog yam ntxwv muab rau ib tug neeg, pab pawg neeg, los yog lwm yam. Koj zoo tshaj tus cwj pwm tej zaum koj yuav txaus siab pab lwm tus, zoo li thaum koj nres tsheb kom cov duck tsev neeg hla txoj kev.
Pom zoo:
Dab tsi yog tus cwj pwm teeb tsa BBC Bitesize?
Cov cim. Computers ua haujlwm hauv binary. Raws li qhov tshwm sim, txhua tus cim, txawm tias lawv yog cov tsiaj ntawv, cim cim lossis tus lej raug khaws cia ua tus lej binary. Tag nrho cov cim uas lub computer siv tau yog hu ua cov cim
Dab tsi yog txoj hlua khiav rau tus cwj pwm '<'?
XML dim cov cim Cov cim tshwj xeeb khiav tawm daim ntawv tau hloov los ntawm Ampersand && Tsawg tshaj < Quotes " '
Dab tsi yog qhov txawv ntawm daim teb thiab tus cwj pwm?
Field A tus tswv cuab ntawm cov chav kawm. AttributeAn attribute yog lwm lub sij hawm rau ib daim teb. Nws feem ntau yog thaj chaw pej xeem uas tuaj yeem nkag mus ncaj qha. Cia peb pom ib qho xwm txheej tshwj xeeb ntawm Array, qhov array yog qhov tsis txaus ntseeg thiab koj tau nkag mus rau pej xeem tus nqi tas li uas sawv cev qhov ntev ntawm cov array
Dab tsi yog tus cwj pwm tswj cov kab kos?
Cov kab kos yog cov kab ntawv tswj tshwj xeeb uas tsim los rau cov ntaub ntawv tus cwj pwm (piv txwv li suav cov ntaub ntawv). Cov kab kos duab saib xyuas cov txheej txheem qhov chaw thiab kev hloov pauv raws sijhawm hauv ib daim ntawv qhia
Cov cim dab tsi tuaj yeem siv los hloov cov khoom siv hluav taws xob ntawm tus cwj pwm hauv tus xaiv?
1. Asterisk (*): Nws yog siv los hloov 1 lossis ntau tus cim los ntawm tus cwj pwm xaiv. Rau Ej. yog tus cwj pwm uas hloov dynamically, txhua zaus koj qhib ib lub vev xaib tshwj xeeb