Cov txheej txheem:

Regex tester yog dab tsi?
Regex tester yog dab tsi?

Video: Regex tester yog dab tsi?

Video: Regex tester yog dab tsi?
Video: Hmong new song 2016 - Yog dab tsi - Xub Hluav Taws (Official MV) 2024, Kaum ib hlis
Anonim

Regex Tester yog ib lub cuab yeej los kawm, tsim, & xeem Cov Lus Qhia Tsis tu ncua ( RegEx / RegExp). Cov txiaj ntsig hloov tshiab hauv lub sijhawm tiag tiag thaum koj ntaus. Yob tshaj ib qho kev sib tw lossis kev qhia kom paub meej. Txuag & qhia cov lus qhia rau lwm tus. Tshawb lub Library rau kev pab & piv txwv.

Tsuas yog li ntawd, qhov regex no ua li cas?

Ib qho kev qhia tsis tu ncua, regex lossis regexp (qee zaus hu ua kev qhia txog kev xav) yog ib ntu ntawm cov cim uas txhais cov qauv tshawb nrhiav. Feem ntau cov qauv no yog siv los ntawm txoj hlua tshawb nrhiav algorithms rau "nrhiav" lossis "nrhiav thiab hloov" kev ua haujlwm ntawm cov hlua, lossis rau kev nkag mus siv tau.

Qhov thib ob, dab tsi yog regex hloov? Hloov (String, String, MatchEvaluator, RegexOptions) Nyob rau hauv ib txoj hlua input uas tau teev tseg, hloov tag nrho cov hlua uas phim ib qho kev teev tseg. kev qhia tsis tu ncua nrog ib txoj hlua xa rov qab los ntawm MatchEvaluator delegate. Cov kev xaiv tshwj xeeb hloov kho cov haujlwm sib txuam.

Kuj nug, regex validation yog dab tsi?

RegEx tso cai rau peb tshawb xyuas cov qauv hauv cov kab ntawv xws li sim kom phim a siv tau email chaw nyob lossis password. Yog hais tias nws yog dynamic koj xav mus xyuas nws tiv thaiv ib tug tej yam qauv rau siv tau nws tiv thaiv ib tug database kab tias. Txij li cov hlua ntawd yog dynamic, koj yuav xav tau ib yam dab tsi rau siv tau nws muaj qhov xav tau parameter.

Yuav ua li cas kuv tsis quav ntsej ib rooj plaub hauv regex?

Yog tias koj xav kom tsuas yog ib feem ntawm regex los ua qhov tsis txaus ntseeg (raws li kuv cov lus teb qub tau hais tseg), ces koj muaj ob txoj kev xaiv:

  1. Siv cov (?i) thiab [optionally] (?-i) modifiers: (?i)G[a-b](?- i).*
  2. Muab tag nrho cov kev hloov pauv (piv txwv li tus lej qis thiab tus lej loj) hauv regex - muaj txiaj ntsig yog tias tsis muaj kev hloov pauv hom tsis txaus siab: [gG][a-bA-B].*

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