Dab tsi yog lub hom phiaj ntawm delimiters nyob rau hauv cov ntawv sau npe ob hom ntawv cov ntaub ntawv delimiters?
Dab tsi yog lub hom phiaj ntawm delimiters nyob rau hauv cov ntawv sau npe ob hom ntawv cov ntaub ntawv delimiters?

Video: Dab tsi yog lub hom phiaj ntawm delimiters nyob rau hauv cov ntawv sau npe ob hom ntawv cov ntaub ntawv delimiters?

Video: Dab tsi yog lub hom phiaj ntawm delimiters nyob rau hauv cov ntawv sau npe ob hom ntawv cov ntaub ntawv delimiters?
Video: Ua poj nrauj vim nyiam sib deev. 10/7/2017 2024, Kaum ib hlis
Anonim

A cov ntaub ntawv delimited yog a cov ntaub ntawv siv los khaws cov ntaub ntawv, hauv uas txhua kab sawv cev rau ib phau ntawv, tuam txhab, lossis lwm yam, thiab txhua kab muaj cov teb sib cais los ntawm cov tus lej.

Tib neeg kuj nug, dab tsi yog lub hom phiaj ntawm delimiters hauv cov ntawv nyeem?

A cov ntaub ntawv delimited yog ib txoj hauv kev los sawv cev cov ntaub ntawv hauv a cov ntaub ntawv siv cov cim los qhia cov qauv ntawm kab thiab kab. Qhov no feem ntau yog siv los muab kev xa tawm / xa tawm muaj nuj nqi rau cov kev pab cuam, software thiab databases uas sawv cev rau cov ntaub ntawv nyob rau hauv ib tug nruab nrab hom.

Tsis tas li ntawd, qhov twg yog qhov zoo tshaj plaws delimiter muaj rau delimit cov ntaub ntawv? Lossis koj tuaj yeem mus rau TSV (tab-sib cais tus nqi) txoj hauv kev, thiab siv "kab rov tav tab" cim (hex 0x09). Cov zoo tshaj delimiter yog "semicolon" (;) vim tias lub cim ntawd tsis tso cai rau kev nkag siab tsis meej ntawm tus lej lej thiab cov lej feem ntau hauv ntau hom lus.

Hais txog qhov no, kuv tuaj yeem siv cov ntawv cais hauv cov ntawv nyeem li cas?

Cov ntaub ntawv ntawv (. txt ) - Commas, tabs, lossis lwm qhov chaw cais tus cwj pwm yog siv kom delimit cov teb hauv txhua cov ntaub ntawv. Lwm qhov chaw cais cov cim yog qhov chaw, kav dej (|), thiab semicolons (;).

Dab tsi yog hom delimiters sib txawv?

Delimiter . A tus lej yog ib lossis ntau tus cim uas cais cov kab ntawv. Feem ntau tus lej yog commas (,), semicolon (;), quotes ( , '), braces ({}), pipes (|), los yog slashes (/). nrog tus cwj pwm ua ntej.

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