- Ziyini izinkulumo ezivamile kanye nenhloso yazo: ukuchaza amaphethini ukuze useshe kahle, uqinisekise, futhi uphathe umbhalo.
- Izinto ezibalulekile: izinhlamvu ezingokoqobo, amakilasi abalingiswa, izinhlamvu eziqondile, kanye nezibalo ezivumela ukwakhiwa kwamaphethini aqondile.
- Izinhlelo zokusebenza eziyinhloko: ukuqinisekiswa kwefomu, ukusesha kanye nokukhipha idatha, ukufaka esikhundleni umbhalo, kanye nokuhlunga amalogi.
- Amathuluzi okuhlola nokulungisa amaphutha: I-Regex101 kanye ne-Regexr zinikeza ukuhlolwa kwesikhathi sangempela kanye nokubona ngeso lengqondo.
Izinkulumo ezijwayelekile , noma i-RegEx , ziyithuluzi eliyisisekelo ekuphatheni nasekucubunguleni umbhalo. Zikuvumela ukuthi useshe amaphethini , wenze ukuqinisekiswa , futhi ufake esikhundleni izingcezu zombhalo ngempumelelo . Ukusetshenziswa kwazo kusuka ekuphathweni kwesistimu kuya ekuthuthukisweni kwewebhu kanye nokuhlela ngezilimi eziningi.
Kulesi sihloko, sizohlola ngokuningiliziwe ukuthi ama-regular expression asebenza kanjani, ukuthi aqukethe ziphi izakhi, nokuthi angasiza kanjani ekuphathweni kombhalo okuthuthukisiwe. Sizophinde sibheke izibonelo ezisebenzayo kanye nokusetshenziswa kwazo ezimweni ezahlukene.
Yiziphi izinkulumo ezivamile?
Inkulumo evamile iwukulandelana kwezinhlamvu okuchaza iphethini yokusesha ngaphakathi kwentambo yombhalo. Zisetshenziswa ezilimini eziningi zokuhlela kanye namathuluzi okuphatha idatha.
Ekuqaleni, umqondo wokubonakaliswa okuvamile wavela emkhakheni wethiyori yolimi olusemthethweni futhi wathandwa kakhulu emhlabeni we-Unix ngenxa yamathuluzi afana ne -grep, sed, kanye ne-awk . Ngokuhamba kwesikhathi, abe yingxenye ebalulekile ekuqinisekisweni kwefomu , ukuphathwa kwamalogi, ukucubungula idatha, nokunye okuningi.
Ukusetshenziswa okuyinhloko kwezinkulumo ezivamile
- Ukuqinisekiswa kwedatha: Angasetshenziswa ukuhlola uma a ikheli le-imeyili, a inombolo yocingo noma a ikhodi ye-zip isesimweni esifanele.
- Ukusesha nokukhipha ulwazi: Benza lula ukusesha amaphethini ngaphakathi kwemibhalo emide, njenge ama-urls o amakhodi okuhlonza.
- Ukushintshwa kombhalo: Zikuvumela ukuthi uguqule iyunithi yezinhlamvu zombhalo ngokufaka okunye esikhundleni amaphethini kwamanye amanani.
- Ukuputshuka kolwazi: Ziwusizo kakhulu ekuhlaziyeni nasekuhleleni idatha kumalogi, kusizindalwazi noma ekucushweni.
Izakhi eziyisisekelo zezinkulumo ezivamile
Ama-Regular Expressions (RegEx) akhiwe ngezinto ezahlukene ezikuvumela ukuthi uchaze amaphethini athile okusesha . Ezisetshenziswa kakhulu zibhalwe ngezansi:
1. Izinhlamvu ezingokoqobo
Lezi yizinto ezilula kakhulu ekubonisweni okuvamile. Zimelela kahle uhlamvu oluthayishiwe.
Isibonelo: Isisho casa izocinga igama elithi “indlu” njengoba livela embhalweni.
2. Amakilasi abalingiswa
Zikuvumela ukuthi uchaze isethi yezinhlamvu ezisebenza esikhundleni esithile.
- [abc]: Ifanisa u-a, b, noma u-c.
- [0-9]: Ifanisa noma iyiphi inombolo ukusuka ku-0 kuye ku-9.
- [^az]: Ifanisa nanoma yiluphi uhlamvu okungelona uhlamvu oluncane.
3. I-Metacharacts
Lezi yizinhlamvu ezikhethekile ezinemisebenzi ethile ngaphakathi kwezinkulumo ezijwayelekile.
- .: Imele noma yimuphi uhlamvu ngaphandle kokunqamuka komugqa.
- \d: Ifanisa noma iyiphi idijithi ukusuka ku-0 kuye ku-9.
- \s: Imele noma yisiphi isikhala esimhlophe (okuhlanganisa amathebhu nokunqamuka kwemigqa).
4. Izibalo
Zichaza inani lezikhathi umlingiswa noma iqembu labalingiswa okufanele livele ngazo.
- +: Okukodwa noma ngaphezulu.
- *: Uziro noma ngaphezulu.
- ?: Zero noma kanye.
- {n,m}: Phakathi kokuphindaphinda kwe-nym.
Izibonelo ezisebenzayo zezinkulumo ezivamile
1. Ukuqinisekisa i-imeyili
Singasebenzisa lesi sisho esilandelayo ukuhlola ukuthi i-imeyili inefomethi evumelekile yini :
^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$
Le nkulumo iqinisekisa ama-imeyili avela ezizindeni ezahlukene ngokuqinisekisa ukuthi aqukethe uphawu "@" kanye nesizinda esivumelekile.
2. Ukuqinisekiswa kwenombolo yocingo
Ukuqinisekisa ifomethi yenombolo yocingo, singasebenzisa inkulumo elandelayo:
^\+?[0-9]{1,3}?[-.\s]?([0-9]{2,4}[-.\s]?){2,3}[0-9]{2,4}$
Ivumela amafomethi ahlukene, kufaka phakathi amakhodi ezwe angakhethwa kanye nezihlukanisi ezifana nama-hyphen noma izikhala.
3. Ukukhishwa kwe-URL
Ukuze sikhiphe ama-URL embhalweni, singasebenzisa:
https?://[\w.-]+(?:\.[a-zA-Z]{2,6})?
Ungahlola kanjani futhi ulungise izisho ezivamile
Ukuqinisekisa ukuthi ukuvezwa okuvamile kusebenza kahle, singasebenzisa amathuluzi aku-inthanethi afana nalawa:
Lawa mapulatifomu akuvumela ukuthi ufake inkulumo evamile futhi uyihlole ngezintambo zombhalo ezahlukene ukuze ubone imiphumela ngesikhathi sangempela.
Izinkulumo ezijwayelekile ziyithuluzi eliwusizo kakhulu lokushintsha umbhalo. Ngokuqonda indlela ezisebenza ngayo kanye nokuzisebenzisa ngendlela efanele, singenza kube lula ukuqinisekiswa kwedatha , ukusesha , kanye nokuguqulwa kwayo emikhakheni eminingi, kusukela ekuhleleni izinhlelo kuya ekuphathweni kwezinhlelo.