Cov txheej txheem:
Video: Cov ntaub ntawv tsawg dua ua haujlwm li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Tsawg dua muab ib haiv neeg hais kom ua kab interface (CLI), lessc, uas ua haujlwm ntau yam haujlwm dhau los tsuas yog sau cov Tsawg dua syntax. Peb siv CLI ua tau lint cov lis dej num, compress cov cov ntaub ntawv , thiab tsim ib daim ntawv qhia chaw. Cov lus txib yog nyob ntawm Node. js uas zoo tso cai rau cov lus txib ua haujlwm thoob plaws Windows, OS X, thiab Linux.
Ib yam li ntawd, cov ntaub ntawv tsawg dua yog dab tsi?
Tsawg dua (Leaner Style Sheets; qee zaum stylized li Tsawg dua ) yog dynamic preprocessor style sheet lus uas tuaj yeem muab tso ua ke rau hauv Cascading Style Sheets (CSS) thiab khiav ntawm tus neeg siv khoom lossis sab server. Indented syntax ntawm Tsawg dua yog ib qho nested metalanguage, raws li siv tau CSS yog siv tau Tsawg dua code nrog tib semantics.
Ib yam li ntawd, dab tsi tsawg dua hauv kev txhim kho lub vev xaib? Txheej txheem cej luam. Tsawg dua (uas sawv cev rau Leaner Style Sheets) yog cov lus rov qab sib txuas ntxiv rau CSS. Nov yog cov ntaub ntawv raug cai rau Tsawg dua , lus thiab Tsawg dua . js, lub cuab yeej JavaScript uas hloov koj Tsawg dua styles rau CSS styles. Vim Tsawg dua zoo li CSS, kawm nws yog ib qho yooj yim.
Yog li ntawd, CSS ua haujlwm tsawg dua li cas?
Tsawg dua tau tsim los kom ze li ntawm CSS raws li qhov ua tau, yog li cov syntax zoo ib yam rau koj tam sim no CSS code. Qhov no txhais tau tias koj tuaj yeem siv tam sim ntawd nrog koj tus lej uas twb muaj lawm. Tsis ntev los no, Sass kuj tau qhia ib CSS -zoo li syntax hu ua SCSS (Sassy CSS ) ua kom yooj yim tsiv teb tsaws chaw.
Yuav ua li cas koj siv tsawg variables?
Cov kev sib txawv tuaj yeem siv ncaj qha, raws li kev siv, hauv ib txoj hlua lossis los tsim qhov chaw ntawm cov qauv ntawv
- ncaj qha. Siv @ syntax siv tus nqi sib txawv ncaj qha: @number: 10; h1 {loj: @number; }
- Raws li siv.
- Sab hauv Khoom Lub Npe.
- Sab hauv hlua.
- Daim Ntawv Txheej Txheem.
Pom zoo:
Vim li cas cov ntaub ntawv tiaj tus tsis zoo dua li cov ntaub ntawv sib raug zoo?
Ib lub rooj ua ntaub ntawv tiaj tus yog qhov tseem ceeb rau kev sau cov ntaub ntawv tsawg. Tab sis cov ntaub ntawv loj loj tuaj yeem ua tsis tau raws li nws siv ntau qhov chaw thiab nco dua li cov ntaub ntawv sib txheeb. Nws kuj yuav tsum tau muab cov ntaub ntawv tshiab ntxiv txhua zaus koj nkag mus rau cov ntaub ntawv tshiab, qhov kev sib raug zoo database tsis
Cov ntaub ntawv zoo li cas yog cov ntaub ntawv ua haujlwm?
Lub chaw ua haujlwm database yog qhov chaw rau cov ntaub ntawv khaws cia. Cov ntsiab lus hauv cov ntaub ntawv ua haujlwm tuaj yeem ntxiv thiab tshem tawm ntawm ya. Cov databases no tuaj yeem yog SQL lossis NoSQL-based, qhov tom kawg yog npaj rau kev ua haujlwm ntawm lub sijhawm
Koj ua li cas sau cov ntaub ntawv hla cov ntawv ua haujlwm?
Nias thiab tuav [Ctrl], thiab tom qab ntawd xaiv ntau dua ib daim ntawv. Nyem Kho> Sau> AcrossWorksheets. Lub Fill Across Worksheets dialog boxappears. Cov ntaub ntawv tau sau thoob plaws ntau daim ntawv teev npe raws li pab pawg
Vim li cas kem taw qhia cov ntaub ntawv khaws cia ua cov ntaub ntawv nkag ntawm disks sai dua li kab qhia cov ntaub ntawv khaws cia?
Kem oriented databases (aka columnar databases) yog qhov tsim nyog rau kev ntsuas kev ua haujlwm ntau dua vim tias cov ntaub ntawv hom ntawv (kem hom) qiv nws tus kheej kom nrawm dua cov lus nug ua - scans, aggregation thiab lwm yam. Ntawm qhov tod tes, kab oriented databases khaws ib kab (thiab tag nrho nws. kab) contiguously
Dab tsi yog cov teeb meem ntawm kev tswj cov ntaub ntawv hauv cov ntaub ntawv ib txwm muaj?
Nyob rau tib lub sijhawm, qhov kev tswj hwm cov ntaub ntawv ib puag ncig tsim teeb meem xws li cov ntaub ntawv rov ua dua thiab tsis sib xws, cov kev pab cuam-cov ntaub ntawv dependence, inflexibility, tsis muaj kev ruaj ntseg, thiab tsis muaj cov ntaub ntawv sib qhia thiab muaj