Video: Qhov txawv ntawm rau hauv thiab rau ntawm yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Qhov txawv rau..thiab rau..ntawm:
Lub xwb txawv yog tshaj qhov lawv iterate: rau..in iterates tshaj tag nrho enumerable cov cuab yeej yuam sij ntawm ib yam khoom. rau.. ntawm iterates tshaj qhov tseem ceeb ntawm ib yam khoom iteable. Piv txwv ntawm cov khoom siv tau yog arrays, hlua, thiab NodeLists.
Hais txog qhov no, qhov txawv ntawm rau hauv thiab rau OF hauv JavaScript?
rau hauv yog siv los voj los ntawm cov khoom ntawm ib yam khoom. Nws tuaj yeem yog txhua yam khoom. rau hauv tso cai rau koj nkag mus rau cov yuam sij ntawm cov khoom tab sis tsis muab kev siv rau qhov tseem ceeb. Hauv JavaScript Cov khoom ntiag tug lawv tus kheej muaj cov khoom siv sab hauv.
uas yog qhov zoo dua rau lossis rauEach hauv JavaScript? rauTxhua yooj yim nyeem hauv a rauTxhua txoj kev, peb dhau txhua hom zaub mov nyob rau hauv uas iteration rau hauv callback. A rau lub voj xav kom koj nkag mus rau array siv ib ntus i kuj sib txawv. Thaum qhov no yuav tsis zoo li ntxhov heev thaum pib, nws tuaj yeem tau txais ntau cluttered thaum koj pib ntxiv ntau code.
Tsis tas li ntawd, qhov sib txawv ntawm rau thiab rauEach yog dab tsi?
Qhov loj tshaj sib txawv yog a ua ntej voj txheej txheem ib qho piv txwv ntawm txhua lub ntsiab hauv a sau nyob rau hauv lem, thaum lub voj voog tuaj yeem ua haujlwm nrog cov ntaub ntawv thiab tsis txwv rau cov khoom sau ib leeg. Qhov no txhais tau hais tias ib lub voj voog tuaj yeem hloov kho cov khoom sau - uas tsis raug cai thiab yuav ua rau muaj qhov yuam kev nyob rau hauv ib tug foreach lub voj.
Dab tsi yog qhov txawv ntawm rau thiab forEach hauv Java?
Lub rau voj yog qhov zoo tshaj plaws rau iterating tshaj lub npe-tus nqi khub, thiab cov rauTxhua yog lub voj zoo tshaj plaws rau iterating tshaj qhov tseem ceeb, piv txwv li arrays lossis khoom. Lub voj voog yog qhov zoo tshaj plaws rau cov npe-tus nqi khub. Lub voj voog tuaj yeem siv los tshawb txog cov khoom ua tau thiab txoj hauv kev ntawm ib qho khoom. Cov rauTxhua Loop yog qhov zoo tshaj plaws rau iterating qhov tseem ceeb.
Pom zoo:
Dab tsi yog qhov txawv ntawm qhov sib txawv hauv zos thiab thoob ntiaj teb hauv SQL Server?
Qhov sib txawv hauv zos tau tshaj tawm hauv ib qho kev ua haujlwm whereas Ntiaj teb hloov pauv tau tshaj tawm sab nraum lub luag haujlwm. Cov kev hloov hauv zos tau tsim thaum lub luag haujlwm tau pib ua tiav thiab ploj thaum lub luag haujlwm xaus, ntawm qhov tod tes, Ntiaj teb hloov pauv yog tsim raws li kev tua pib thiab ploj thaum qhov kev pab cuam xaus
Dab tsi yog qhov sib txawv ntawm lub thawv thiab lub thawv ntawv thiab lub thawv ntawv yog dab tsi?
Ib lub thawv thiab cov ntawv nplawm (qee zaum hu ua boxplot) yog ib daim duab uas nthuav tawm cov ntaub ntawv los ntawm tsib lub ntsiab lus. Nyob rau hauv ib lub thawv thiab whisker zajlus: qhov kawg ntawm lub thawv yog lub sab sauv thiab sab quartiles, yog li lub thawv spans lub interquartile ntau yam. qhov nruab nrab yog cim los ntawm ib txoj kab ntsug hauv lub thawv
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 zoo sib xws thiab qhov txawv ntawm relays thiab PLC yog dab tsi?
Relays yog electro-mechanical keyboards uas muaj coil thiab ob hom kev sib cuag uas tsis yog NO & NC. Tab sis Programmable Logic Controller, PLC yog lub khoos phis tawj me uas tuaj yeem txiav txim siab raws li qhov kev zov me nyuam thiab nws cov tswv yim & tso tawm
Dab tsi yog qhov sib txawv ntawm qhov ntsuas qhov ntsuas thiab qhov ntsuas thib ob?
Primary index: nyob rau hauv ib tug sequentially order file, qhov Performance index uas nws search key qhia cov sequential order ntawm cov ntaub ntawv. Kuj hu ua clustering index. Secondary index: ib qho Performance index uas nws qhov tseem ceeb tshawb nrhiav qhia qhov kev txiav txim sib txawv ntawm qhov kev txiav txim ntawm cov ntaub ntawv. Kuj hu ua non-clustering index