Video: Dab tsi yog qhov sib xyaw hauv OOP nrog piv txwv?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Kev sib xyaw yog ib qho ntawm cov ntsiab lus tseem ceeb hauv object-oriented programming. Nws piav txog ib chav kawm uas hais txog ib lossis ntau yam khoom ntawm lwm chav kawm hauv cov piv txwv piv txwv. Qhov no tso cai rau koj los ua qauv muaj kev sib koom ua ke ntawm cov khoom. Koj tuaj yeem pom cov kev sib raug zoo li no tsis tu ncua hauv lub ntiaj teb tiag.
Ntxiv mus, dab tsi yog qhov sib xyaw nrog piv txwv?
Lub ntsiab txhais ntawm muaj pes tsawg leeg yog kev ua ntawm muab ib yam dab tsi ua ke, los yog kev sib xyaw ntawm cov ntsiab lus lossis cov khoom zoo. Ib piv txwv ntawm a muaj pes tsawg leeg yog kev ua paj. Ib piv txwv ntawm a muaj pes tsawg leeg yog ib phau ntawv. Ib piv txwv ntawm a muaj pes tsawg leeg yog li cas cov paj thiab vase tau teeb tsa hauv Van Gogh's painting Sunflowers.
Ib yam li ntawd, kev sib raug zoo yog dab tsi? Kev sib xyaw yog ib daim ntawv txwv ntawm Aggregation uas ob lub koom haum muaj kev vam khom rau ib leeg. Nws sawv cev ib feem ntawm kev sib raug zoo . Hauv muaj pes tsawg leeg , ob lub koom haum yog nyob ntawm ib leeg. Thaum muaj ib tug muaj pes tsawg leeg nruab nrab ntawm ob qhov chaw, cov khoom tsim tsis tuaj yeem nyob tsis muaj lwm qhov chaw.
Tom qab ntawd, lo lus nug yog, dab tsi yog qhov sib xyaw hauv C ++ nrog piv txwv?
Kev sib xyaw kev sib raug zoo yog ib feem-tag nrho kev sib raug zoo uas ib feem yuav tsum yog ib feem ntawm tag nrho cov khoom. Rau piv txwv , lub siab yog ib feem ntawm tib neeg lub cev. Ib feem hauv a muaj pes tsawg leeg tuaj yeem yog ib feem ntawm ib qho khoom ntawm ib lub sijhawm.
Kev sib xyaw thiab kev sib sau yog dab tsi?
Kev sib sau ua ke qhia txog kev sib raug zoo uas tus menyuam tuaj yeem nyob ntawm nws tus kheej ntawm niam txiv. Piv txwv li: Chav kawm (niam txiv) thiab Tub Kawm Ntawv (me nyuam). Rho tawm Chav Kawm thiab Cov Tub Kawm tseem muaj nyob. Kev sib xyaw qhia txog kev sib raug zoo uas tus menyuam tsis tuaj yeem nyob ywj pheej ntawm niam txiv. Piv txwv li: Tsev (niam txiv) thiab Chav (me nyuam).
Pom zoo:
Dab tsi yog qhov piv txwv ntawm qhov zoo nrog rau qhov zoo network sab nraud cuam tshuam?
Cov piv txwv classic yog xov tooj, qhov twg ntau tus neeg siv nce tus nqi rau txhua tus. Qhov zoo sab nraud yog tsim thaum lub xov tooj tau yuav yam tsis muaj nws tus tswv xav tsim kom muaj txiaj ntsig rau lwm tus neeg siv, tab sis ua li ntawd txawm tias
Dab tsi yog qhov sib txawv tseem ceeb ntawm Amazon EBS thim rov qab thiab piv txwv khw Rov qab piv txwv?
Dab tsi yog qhov sib txawv tseem ceeb ntawm Amazon EBS-txhawb thiab qhov piv txwv-khoom txhawb nqa? Amazon EBS-rov qab piv txwv tuaj yeem nres thiab rov pib dua. Instance-store backed instances tuaj yeem nres thiab rov pib dua. Nws pib scaling yuav tsum siv Amazon EBS-rov qab piv txwv
Dab tsi yog qhov sib txawv ntawm qhov sib xyaw ua ke thiab qhov qub txeeg qub teg?
Txawm hais tias ob qho tib si Inheritance thiab Composition muab code reusablelility, qhov sib txawv tseem ceeb ntawm Composition thiab Inheritance nyob rau hauv Java yog tias Composition tso cai rov qab siv code yam tsis tau ncua nws tab sis rau Inheritance koj yuav tsum ncua chav kawm rau ib qho kev rov qab siv code lossis functionality
Dab tsi yog qhov txawv ntawm qhov piv txwv hauv zos thiab chav kawm sib txawv?
Cov kev hloov hauv zos tsis pom sab nraum txoj kev. Cov piv txwv sib txawv tau tshaj tawm hauv chav kawm, tab sis sab nraum ib txoj hauv kev. Lawv kuj raug hu ua cov tswv cuab lossis cov kev hloov pauv. Class/static variables tau tshaj tawm nrog lo lus tseem ceeb zoo li qub hauv chav kawm, tab sis sab nraum ib txoj kev
Dab tsi yog qhov qub txeeg qub teg Dab tsi yog qhov sib txawv ntawm qhov qub txeeg qub teg piav nrog piv txwv?
Inheritance yog ib txoj hauv kev kom tau txais cov yam ntxwv thiab kev coj cwj pwm ntawm ib chav kawm los ntawm lwm chav kawm. Cov chav kawm uas cov tswv cuab tau txais qub txeeg qub teg yog hu ua chav kawm hauv paus, thiab chav kawm uas tau txais cov tswv cuab tam sim no hu ua chav derived. Inheritance siv IS-A kev sib raug zoo