Video: Monads siv rau dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Los ntawm wikipedia: Hauv kev ua haujlwm ua haujlwm, a monad yog hom ntaub ntawv paub daws teeb siv los sawv cev kev suav (tsis yog cov ntaub ntawv hauv tus qauv sau npe). Monads tso cai rau tus programmer los sib txuas cov yeeb yam ua ke los tsim ib lub raj xa dej, uas txhua qhov kev nqis tes ua yog dai kom zoo nkauj nrog cov txheej txheem ua haujlwm ntxiv los ntawm monad.
Ib yam li ntawd, lub ntsiab lus ntawm monads yog dab tsi?
Monads tsis yog ib qho cuab yeej los tiv thaiv kev mob tshwm sim. Monads yog siv rau, ntawm lwm yam, statically taug qab cov teebmeem. Qhov no paub txog qhov tseem ceeb ntawm cov teebmeem thiab tsis txhob tso lawv li "kev mob tshwm sim".
Tsis tas li ntawd, daim ntawv qhia yog Monad? khi (los yog flatMap) thiab chav tsev (tus tsim) yog txhua yam nws yuav siv los txiav txim siab a monad . Los ntawm ob qho no, peb kuj tuaj yeem tsim daim ntawv qhia . daim ntawv qhia cia peb hloov cov khoom qhwv yam tsis tas yuav rov qhwv nws tus kheej thaum kawg ntawm txoj haujlwm. Ua li no, daim ntawv qhia tuaj yeem sau nyob rau hauv cov nqe lus ntawm khi thiab unit.
Tib neeg kuj nug, dab tsi yog monads hauv kev ua haujlwm ua haujlwm?
Hauv ua haujlwm programming , a monad yog tus qauv tsim uas tso cai rau kev tsim cov kev pab cuam dav dav thaum automating deb boilerplate code xav tau los ntawm qhov kev pab cuam logic. Txij li thaum monads ua semantics kom meej meej rau ib hom kev xam, lawv kuj siv tau los siv cov lus yooj yim.
Puas yog Monad ua haujlwm?
A tus ua haujlwm yog hom ntaub ntawv uas siv cov Function typeclass. Ib qho applicative yog hom ntaub ntawv uas siv cov Applicative typeclass. A monad yog hom ntaub ntawv uas siv cov Monad typeclass.
Pom zoo:
Dab tsi ntawm pipette yog volumetric thiab nws siv rau dab tsi?
Lub volumetric pipette, noob pipette, lossis lub plab pipette tso cai rau kev ntsuas qhov tseeb (rau plaub qhov tseem ceeb) ntawm qhov ntim ntawm cov tshuaj. Volumetric pipettes feem ntau yog siv rau hauv analytical chemistry los ua cov kev daws teeb meem los ntawm lub hauv paus Tshuag thiab npaj cov kev daws teeb meem rau titration
Dab tsi yog kev siv cov saw hlau nuclear siv rau?
Nuclear chain reaction. Nuclear chain reactions yog cov tshuaj tiv thaiv uas tau txais lub zog nuclear, feem ntau los ntawm nuclear fission. Cov kev cuam tshuam ntawm cov saw hlau no yog qhov muab cov chaw tsim hluav taws xob nuclear nrog lub zog uas tom qab ntawd hloov mus ua hluav taws xob siv los ntawm tib neeg
Dab tsi yog qhov sib npaug siv los xam tag nrho cov khoom siv hluav taws xob siv?
Cov mis uas txuas lub zog thiab lub zog yog: Zog = Lub Zog x Sijhawm. Chav tsev ntawm lub zog yog joule, lub zog ntawm lub zog yog watt, thiab chav tsev ntawm lub sijhawm yog qhov thib ob
Dab tsi yog qhov tseem ceeb tshaj plaws uas yuav tsum muaj rau cov kua dej ntws hauv cov kav dej Dab tsi lwm yam cuam tshuam rau cov dej ntws?
Thaum ib qho kev quab yuam sab nraud yog exerted rau ntawm cov kua uas muaj, qhov tshwm sim siab yog kis sib npaug thoob plaws hauv cov kua. Yog li txhawm rau kom dej ntws, dej xav tau qhov sib txawv siab. Cov kav dej kuj tuaj yeem cuam tshuam los ntawm cov kua dej, cov yeeb nkab loj, qhov kub thiab txias (cov kav dej khov), cov kua dej ntom ntom
Dab tsi yog qhov txawv ntawm cov khoom siv organic thiab cov khoom siv organic?
Dab tsi yog qhov txawv ntawm cov khoom siv organic thiab organic teeb meem? Organic khoom yog txhua yam uas tseem muaj sia nyob thiab tam sim no nyob rau hauv lossis hauv av. Rau nws los ua cov organic teeb meem, nws yuav tsum tau decomposed rau hauv humus. Humus yog cov khoom siv organic uas tau hloov dua siab tshiab los ntawm cov kab mob mus rau lub xeev tsis muaj zog