Object vs Chav Kawm
Cov khoom thiab cov chav kawm yog siv rau cov hom lus taw qhia cov lus qhia. Txhua yam lus taw qhia cov lus programming xws li C ++, Java,. NET thiab lwm yam, ntiav cov khoom thiab cov chav kawm.
khoom
Ib yam khoom txhais tau tias yog ib qho chaw uas tuaj yeem siv tau los ntawm kev siv cov lus txib hauv cov lus programming. Cov khoom tuaj yeem yog qhov sib txawv, tus nqi, cov qauv ntaub ntawv lossis kev ua haujlwm. Hauv cov khoom taw qhia ib puag ncig, khoom raug xa mus ua piv txwv ntawm chav kawm. Cov khoom thiab cov chav kawm muaj kev sib raug zoo rau ib leeg. Hauv ntiaj teb tiag tiag, cov khoom yog koj lub TV, tsheb kauj vab, rooj thiab lwm qhov chaw. Cov txheej txheem yog siv los nkag rau cov khoom ntawm chav kawm. Txhua qhov kev sib cuam tshuam yog ua los ntawm cov khoom siv txoj hauv kev. Qhov no yog hu ua cov ntaub ntawv encapsulation. Cov khoom siv kuj siv rau cov ntaub ntawv lossis cov lej zais.
Ntau cov txiaj ntsig yog muab los ntawm cov khoom thaum lawv siv hauv cov cai:
• Yooj yim ntawm kev debugging - Cov khoom tuaj yeem raug tshem tawm yooj yim ntawm txoj cai yog tias muaj qee qhov teeb meem vim nws. Ib yam khoom sib txawv tuaj yeem ntsaws rau hauv qhov hloov ntawm qhov qub.
• Cov ntaub ntawv zais - Cov cai lossis kev siv sab hauv tau muab zais los ntawm cov neeg siv thaum kev sib cuam tshuam los ntawm cov khoom siv txoj hauv kev.
• Rov qab siv cov lej - yog tias ib qho khoom lossis tus lej sau los ntawm lwm tus programmer ces koj tuaj yeem siv cov khoom ntawd hauv koj qhov program. Nyob rau hauv no txoj kev, cov khoom yog heev reusable. Qhov no tso cai rau cov kws paub txog kev debug, siv cov haujlwm tshwj xeeb thiab cov khoom nyuaj uas tuaj yeem siv rau hauv koj tus kheej cov cai.
• Modularity - Koj tuaj yeem sau thiab khaws cov lej ntawm cov khoom hauv kev ywj pheej. Qhov no muab txoj hauv kev modular rau programming.
Chav Kawm
Ib chav kawm yog ib lub tswv yim siv hauv cov hom lus taw qhia cov lus xws li C ++, PHP, thiab JAVA thiab lwm yam. Ntxiv rau kev tuav cov ntaub ntawv, chav kawm kuj siv los tuav cov haujlwm. Ib yam khoom yog ib qho instant ntawm ib chav kawm. Nyob rau hauv cov ntaub ntawv ntawm variables, hom yog cov chav kawm whereas lub variable yog cov khoom. Lo lus tseem ceeb "chav kawm" yog siv los tshaj tawm cov chav kawm thiab nws muaj cov qauv hauv qab no:
class CLASS_NAME
{
AccessSpecifier1:
Muab-1;
AccessSpecifier2:
Muab-2;
} OBJECT_NAMES;
Ntawm no, tus lej siv tau yog CLASS_NAME thiab cov npe ntawm cov khoom raug sawv cev los ntawm OBJECT_NAMES. Cov txiaj ntsig ntawm cov khoom muaj xws li cov ntaub ntawv zais, modularity, yooj yim hauv kev debugging thiab rov siv cov cai. Lub cev muaj cov tswv cuab uas tuaj yeem ua haujlwm lossis cov ntaub ntawv tshaj tawm. Cov ntsiab lus tseem ceeb rau kev nkag mus rau qhov tshwj xeeb yog pej xeem, tiv thaiv lossis ntiag tug.
• Cov tswv cuab pej xeem tuaj yeem nkag mus rau txhua qhov chaw.
• Cov tswv cuab tiv thaiv tuaj yeem nkag mus rau hauv tib chav kawm lossis los ntawm cov phooj ywg hauv chav kawm.
• Cov tswv cuab ntiag tug tuaj yeem nkag tau hauv tib chav kawm xwb.
Los ntawm lub neej ntawd, kev nkag mus yog ntiag tug thaum siv cov lus tseem ceeb hauv chav kawm. Ib chav kawm tuaj yeem tuav tau ob qho tib si cov ntaub ntawv thiab kev ua haujlwm.
Object vs. Classes
• Ib yam khoom yog ib qho tam sim ntawm chav kawm. Ib chav kawm yog siv los tuav cov ntaub ntawv thiab ua haujlwm.
• Thaum ib chav kawm tau tshaj tawm, tsis muaj lub cim xeeb tau faib tab sis thaum cov khoom ntawm chav kawm tau tshaj tawm, nco tau faib. Yog li, chav kawm tsuas yog tus qauv xwb.
• Ib yam khoom tsuas yog tsim tau yog hais tias chav kawm twb tau tshaj tawm txwv tsis pub nws ua tsis tau
