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Ua faʻamautu mai e le tagata tomai faapitoa Semina Mea Tatau E Tatau Ona E Iloa e uiga i le Sugex Scraper

1 answers:

O se faʻamatalaga faifaipea poʻo le regex o se faasologa o faʻamaumauga e faʻaaogaina mo suʻesuʻega faʻamaumauga le upega. E mafai ai e le au failautusi ma tagata atiae ona maua mea e aoga ai. Talu mai le 1980, o faʻamatalaga masani e faʻaaoga mo le tusiaina o tulafono. Latou te suia talatalanoaga o tusitala o tusitusi ma failaiga o upu i faʻamatalaga e mafai ona mafai ona mafai ona faʻaaogaina ma faʻamaonia. C ++, Python, JavaScript ma isi gagana polokalame e maua ai potutusi o le regex ma faʻafaigofie lau galuega - microsoft sql server bi tools.

Fausia tusi faʻataʻitaʻiga masani:

Faʻatautaia le tele o tusi talosaga ma faʻamatalaga faifaipea poʻo le regex. Faatasi ai ma le PowerGREP, e mafai ona tatou suesue i faila ma faila i luga o la tatou komepiuta, faasaʻo faamatalaga ma ao mai faamatalaga mai punaoa eseese. O le eletise masani a le PowerGREP e masani ona fetaui ma le Penina,. Networks ma Java ma faʻaaogaina mo polokalame, webmasters, ma atinaʻe o mea e fai. Afai e te manaʻo e atiaʻe se komepiuta faʻapipiʻi poʻo se mea feaveaʻi, e mafai ona e faʻapolopolo le tele o le taimi ma le malosi i faʻamatalaga masani. E tatau ona e tuʻuina atu ni code laiti e maua ai se atinaʻega. RegexBuddy ma EditPad Pro o ni mea faʻatautaia se lua ua fausiaina ma faʻaaliga masani.

Faʻapitoa mo tagata e le o polokalame faʻapitoa:

O se tasi o aoga tele o faʻamatalaga masani o le talafeagai lea mo tagata e le o ni coders ma ē e le o polokalama.Faʻamatalaga masani, e le manaʻomia ona e aʻoaʻoina ni tulafono laiti pe maua ai tomai faʻalauiloa. E na ona e manaʻomia se malamalamaaga masani o Python, BeautifulSoup, JavaScript, ma Regex e faʻauʻu ai lau galuega. E lelei foʻi mo freelancers ma 'upega tafaʻilagi e leai ni faʻamatalaga faʻapipiʻi poʻo ni polokalame faʻalauiloaina.

Faʻailoga:

O se mamanu regex e fetaui ma le manoa faʻatatau. O lenei mamanu e aofia ai se faasologa o atoms. O le atomea o se tasi o vaega i le mamanu regex lea e taulai ai le manoa i se auala sili atu. E sili atu ma le sefulufa ia faʻataʻitaʻiga regex, e faʻavae i luga o latou uiga moni ma talosaga.

XPath - O se meafaigaluega mamana mo oe:

XPath o se tasi o mea sili ona lelei ma sili ona aoga mea e faʻaaogaina s ma tagata suʻeina faʻamatalaga. Na te aoina mai mamanu faʻamaumauga mai itulau eseese o laupepa, e fatuina ai laina ma faʻapipiʻi faʻamaumauga i se faatulagaga e mafai ona faʻaleleia ma mafai ona faʻaleleia. XPath muamua e iloa le anotusi o se 'upega tafaʻilagi, iloilo lona uiga lelei ma faʻamalamalamaina mea e sili ona lelei mo oe. O lenei masini suauʻu ma le upega tafaʻilagi o loʻo tuʻuina atu ai le tele o tusi talosaga, e pei o le toe taʻua, faʻamaumauga POSIX ma sui.

E tasi le laina o Regex e mafai ona suia le 100 laina o tulafono laiti:

O se laina se tasi o le regex ua lava lea e sui ai i le 100 laina o tulafono laiti mai se upega tafaʻilagi. O lona uiga e le manaʻomia ona e aʻoaʻoina ni tulafono faʻapitoa e faʻatinoina ai lau galuega. I faʻamatalaga masani, e faigofie tele faʻamatalaina faʻamaumauga mai 'upega tafaʻilagi eseese ma fatuina mamanu faʻamaumauga ma laina.

Ona o lona mana faʻaalia ma le faigofie o le faitau, ua tele gagana ma polokalama aoga ua filifilia mo faʻamatalaga masani pei o Java, Python, JavaScript, Ruby, Qt, XML Schema ma. NET Framework. Perl 5. 10 faʻaaogaina faʻaopoopoga faʻasolosolo ua atiae i le Python ma le PCRE. O le tele o pulega faʻapitoa e faʻamalosi e faʻatautaia fesili e faʻatatau i le regex i totonu aua o masini suʻesuʻe e le maua ai le lagolago regex i tagata lautele.

O faʻamatalaga masani e avea ma meafaigaluega taua mo le faʻamalamalamaina ma faʻataʻotiina o upega tafailagi . Latou te maua se faʻamatalaga sili ona faʻaaogaina ma e talafeagai mo matata faʻalauiloa ma tagata e leai ni tomai.

December 22, 2017