Cov txheej txheem:
Video: Dab tsi yog qhov yuam kev syntax hauv JavaScript?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov SyntaxError khoom sawv cev ib yuam kev thaum sim txhais lus syntactically invalid code. Nws raug pov tseg thaum lub JavaScript cav ntsib tokens lossis token xaj uas tsis ua raws li syntax ntawm cov lus thaum parsing code.
Ua raws li qhov no hauv kev xav, dab tsi yog hom yuam kev hauv JavaScript?
Tib yam mus rau hauv JavaScript ! Yog tias koj ntxiv 1 thiab H hauv JavaScript lossis thaum koj sim ua haujlwm ntawm ob qhov kev ua haujlwm tsis sib xws hom , JavaScript pov a TypeError . Rau MDN: 'A TypeError raug pov tseg thaum ib qho kev ua haujlwm lossis kev sib cav dhau mus rau qhov ua haujlwm tsis sib haum nrog hom xav tau los ntawm tus neeg teb xov tooj lossis kev ua haujlwm.
Qhov thib ob, kuv tuaj yeem ua yuam kev hauv JavaScript li cas? Cov nqe lus sim tso cai rau koj los txhais ib qho thaiv ntawm cov lej yuav raug kuaj rau yuam kev thaum nws tab tom raug tua. Cov ntes nqe lus tso cai rau koj los txhais ib qho thaiv ntawm cov cai kom raug tua, yog tias muaj yuam kev tshwm sim hauv qhov sim thaiv.
Tsis tas li ntawd, koj yuav kho qhov yuam kev syntax li cas?
Thaum twg qhov yuam kev syntax hauv WP tshwm sim, koj tau txais cov lus zoo li no:
- Tsis txhob txhawj yog tias koj tsis tuaj yeem nkag mus rau koj lub dashboard.
- Ua raws li txoj hauv kev hauv cov lus yuam kev syntax:
- Nrhiav cov ntaub ntawv lossis cov ntawv tais ceev tseg uas ua rau muaj qhov teeb meem, nyem rau ntawm nws thiab xaiv ib qho ntawm cov kev xaiv los kho qhov tsim nyog (ntxiv lossis tshem tawm cov cai)
Muaj pes tsawg hom kev ua yuam kev hauv JavaScript?
peb
Pom zoo:
Dab tsi yog qhov sib txawv loj ntawm kev txheeb xyuas qhov yuam kev thiab kev kho cov lej yuam kev?
Ob qhov kev tshawb nrhiav qhov yuam kev thiab kev kho qhov yuam kev yuav tsum muaj qee qhov ntawm cov ntaub ntawv rov qab xa mus nrog cov ntaub ntawv tiag tiag; kev kho yuav tsum muaj ntau tshaj li kev tshawb nrhiav. Parity bits yog ib txoj hauv kev yooj yim rau kev tshawb nrhiav qhov yuam kev. Ib qho parity me ntsis yog ib qho ntxiv me ntsis xa nrog cov ntaub ntawv uas tsuas yog 1-ntsis suav ntawm cov ntaub ntawv
Dab tsi yog qhov txawv ntawm qhov yuam kev hauv kev suav nyiaj?
Muaj ntau ntau hom kev ua yuam kev hauv kev suav nyiaj. Accounting yuam kev yog feem ntau unintentional yuam kev ua thaum sau phau ntawv sau. Subsidiary nkag. Qhov yuam kev ntawm Omission. Transposition yuam kev. Rounding yuam kev. yuam kev ntawm Txoj Cai. yuam kev ntawm Reversal. Qhov yuam kev ntawm Commission
Dab tsi yog qhov kev lees paub yuam kev hauv JUnit?
Lub hauv paus ntsiab lus ntawm JUnit yog muab los ntawm chav kawm org. 1 Assert #fail() cuam tshuam qhov kev lees paub yuam kev yam tsis muaj xwm txheej. Qhov no tuaj yeem pab tau los cim qhov kev xeem tsis tiav lossis kom ntseeg tau tias qhov kev cia siab tau raug muab pov tseg (saib Cov Lus Qhia Tshwj Xeeb Hauv Cov Qauv Xeem)
Vim li cas kev cob qhia yuam kev tsawg dua qhov kev xeem yuam kev?
Kev cob qhia yuam kev feem ntau yuav tsawg dua qhov kev xeem yuam kev vim tias tib cov ntaub ntawv siv los ua kom haum tus qauv yog ua haujlwm los ntsuas nws qhov kev kawm yuam kev. Ib feem ntawm qhov tsis sib xws ntawm qhov kev cob qhia yuam kev thiab qhov kev xeem yuam kev yog vim tias cov txheej txheem kev cob qhia thiab cov ntawv xeem muaj qhov sib txawv ntawm cov khoom siv
Leej twg tsim qhov yuam kev ntawm qhov yuam kev?
Lub sij hawm tseem ceeb ntawm qhov yuam kev raug tsim nyob rau xyoo 1977 los ntawm tus kws kho mob hlwb Lee Ross. Txawm li cas los xij, kev tshawb fawb txog qhov yuam kev tseem ceeb rov qab mus rau xyoo 1950 thaum cov kws paub txog kev puas siab puas ntsws Fritz Heider thiab Gustav Ichheiser pib tshawb xyuas cov neeg nkag siab txog qhov ua rau tib neeg tus cwj pwm