2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Change Detection txhais tau tias hloov DOM thaum twg cov ntaub ntawv hloov pauv. Angular muab ob lub tswv yim rau Kev Tshawb Fawb Hloov. Hauv nws lub tswv yim zoo, thaum twg cov ntaub ntawv hloov pauv lossis hloov pauv, Angular yuav khiav qhov hloov pauv kom hloov kho DOM.
Angular kuaj pom qhov hloov pauv li cas?
Txhawm rau khiav lub ntsuas qhov hloov pauv manually:
- Txhaj Tshuaj Tiv Thaiv Kev Tiv Thaiv Kev Pabcuam hauv kev tivthaiv.
- Siv markForCheck nyob rau hauv subscription method qhia Angular xyuas cov khoom nyob rau hauv lub sij hawm tom ntej hloov detectors khiav.
- Nyob rau ngOnDestroy lub neej voj voog nuv, unsubscribe from the observable.
Dab tsi yog qhov hloov pauv kev tshawb nrhiav lub voj voog hauv Angular?
Thaum hloov pauv kev tshawb pom Angular khiav dhau ntawm kev khi, ntsuas cov lus qhia, piv rau cov nqi dhau los thiab hloov kho DOM yog tias tsim nyog. Tom qab txhua lub voj voog tshawb pom kev hloov pauv, Angular sau ib daim tshev los xyuas kom meej tias lub xeev cov khoom nyob hauv sync nrog cov neeg siv interface.
Angular onPush hloov nrhiav pom yog dab tsi?
Lub tswv yim OnPush hloov Angular qhov kev hloov pauv tus cwj pwm hauv ib txoj hauv kev zoo ib yam li kev tshem tawm ib feem. Qhov kev hloov pauv tsis ua haujlwm rau txhua qhov txuas ntxiv lawm. Angular hloov mloog rau cov kev hloov pauv tshwj xeebthiab tsuas yog khiav qhov kev hloov pauv ntawm tus ntoo cuam tshuam rau cov khoom ntawd.
Txoj kev tshawb nrhiav kev hloov pauv yog dab tsi?
Lub hauv paus txheej txheem ntawm kev kuaj pom kev hloov pauv yog rauua cov tshev tawm tsam ob lub xeev, ib qho yog lub xeev tam sim no, lwm lub xeev yog lub xeev tshiab. Yog tias ib lub xeev no txawv ntawm lwm qhov, ces ib yam dab tsi tau hloov, txhais tau tias peb yuav tsum tau hloov kho (lossis rov ua dua) qhov kev pom.
Pom zoo:
Ntawm kev pauv pauv pauv hloov pauv?
Kev sib pauv pauv hloov pauv yog daim ntawv cog lus nyiaj txiag uas tau teev tseg thiab ua lag luam ntawm kev sib pauv hloov pauv. Qhov yooj yim hais, cov no yog cov khoom siv uas tau pauv pauv hauv kev tswj hwm. … Cov yav tom ntej thiab cov kev xaiv yog ob qho kev sib pauv uas nrov tshaj plaws.
Qhov kev hloov pauv no puas yuav ua rau muaj kev hloov pauv hloov pauv?
Yog li, yog tias muaj kev hloov pauv, piv txwv li, kev ntxig lossis tshem tawm ntawm nucleotide, tshwm sim, qhov no tuaj yeem ua rau kev hloov pauv ntawm kev nyeem ntawv. Nws hloov tag nrho cov amino acid ib ntus. Cov kev hloov pauv no yog hu ua frameshift mutation (tseem hu ua kev nyeem ntawv hloov pauv, nyeem ntawv hloov pauv, lossis framing yuam kev).
Qhov twg yog qhov kev hloov pauv hloov pauv hloov pauv?
Semiconservative replication piav qhia txog cov txheej txheem ntawm DNA replication nyob rau hauv tag nrho cov paub hlwb. DNA replication tshwm sim ntawm ntau lub hauv paus pib ntawm kev rov ua dua raws DNA qauv strand. Raws li DNA ob chav helix yog unwound by helicase, replication tshwm sim nyias ntawm txhua tus qauv strand nyob rau hauv antiparallel cov lus qhia.
Qhov kev hloov pauv twg yog xav tias yuav cuam tshuam los ntawm kev hloov pauv hloov pauv?
Dependent Variable Qhov sib txawv uas nyob ntawm lwm yam uas ntsuas. Cov kev hloov pauv no yuav tsum tau hloov pauv raws li qhov kev sim ua haujlwm ntawm tus kheej hloov pauv lossis hloov pauv. Nws yog cov nyhuv presumed. Qhov kev tshawb fawb hloov pauv twg yog qhov tshwm sim?
Los ntawm kev hloov pauv hloov pauv hloov pauv?
Kev hloov pauv hloov pauv hloov pauv (TMA) yog qhov isothermal (tsis hloov pauv nucleic acid kub), ib leeg-tube nucleic acid amplification system siv ob lub enzymes, RNA polymerase thiab thim rov qab kev sau ntawv. … Cov txheej txheem no tuaj yeem siv los tsom rau RNA thiab DNA.
