Video: Kev suav suav VBA yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
VBA chav kawm: suav suav . Raws li Michael Rutten's Hidden Gems Dawb, lub khw muag khoom Visual Basic tsis tu ncua yog suav suav ntawm qhov chaw nco tam sim tom qab nws VTable pointer.
Tib neeg kuj nug, dab tsi yog qhov counter reference?
Hauv computer science, siv suav yog ib qho programming txheej txheem khaws cov naj npawb ntawm cov ntaub ntawv , pointers, los yog handles rau ib qhov chaw, xws li ib yam khoom, ib tug thaiv ntawm nco, disk chaw, thiab lwm yam.
Ib sab saum toj no, tsis muaj dab tsi VBA lub ntsiab lus? Cov Tsis muaj dab tsi lo lus tseem ceeb yog siv los disassociate ib yam khoom sib txawv ntawm ib yam khoom tiag. Siv cov lus teev los muab Tsis muaj dab tsi rau ib qho khoom sib txawv. Piv txwv li: Teeb MyObject = Tsis muaj dab tsi.
Qhov thib ob, qhov kev siv suav suav hauv Python yog dab tsi?
Kev suav suav . Kev suav suav yog ib qho yooj yim txheej txheem uas cov khoom yog deallocated thaum tsis muaj siv rau lawv hauv qhov program. Txhua qhov sib txawv hauv Python yog a siv (tus pointer) rau ib yam khoom thiab tsis yog tus nqi tiag tiag nws tus kheej.
Kuv yuav siv tsis muaj dab tsi hauv VBA li cas?
Tsis muaj dab tsi . Ib yam khoom sib txawv uas tsis tau pib muaj tus nqi ntawm Tsis muaj dab tsi . Koj yuav tsum siv tus neeg khiav dej num los ntsuam xyuas kev sib npaug. Koj ua tsis tau siv ib qho kos npe sib npaug (=) thaum ua haujlwm nrog cov khoom sib txawv, tsuas yog hom ntaub ntawv yooj yim xwb.
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
Qhov twg hauv qab no yog suav tias yog kev tswj hwm kev ua haujlwm ntawm kev tswj hwm database DBMS)?
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Dab tsi yog suav tias yog cov ntaub ntawv tiv thaiv kev noj qab haus huv PHI?
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Dab tsi yog qhov kev txwv kev ncaj ncees piav qhia txog kev ncaj ncees lossis kev txwv txawv teb chaws?
Kev lees paub ncaj ncees xav kom tus yuam sij txawv teb chaws yuav tsum muaj tus yuam sij tseem ceeb sib xws lossis nws yuav tsum yog null. Qhov kev txwv no tau teev tseg ntawm ob lub rooj (niam txiv thiab menyuam); nws tuav cov ntawv xov xwm ntawm kab hauv cov rooj no. Nws txhais tau hais tias kev siv los ntawm kab hauv ib lub rooj mus rau lwm lub rooj yuav tsum siv tau