CODEWITHSUNDEEP
javascriptregex
Igal
Igal

Reputation: 6083

RegEx with a certain string and any amount of chars after that

I need to have a regex that will check if a certain string exists in another string and has any amount of chars after that. I wrote this expression:

(somesite.com\/user\/[a-zA-Z0-9-_])\w\S

So, for example, this string www.somesite.com/user/username should return true, while this one www.somesite.com/user - false.

For some reason it works only if I have at least 3 chars after the somesite.com/user/ part. So somesite.com/user/me returns false. And somesite.com/user/someuser returns true only for somesite.com/user/som.

The only allowed chars after the user/ part should be a-z, A_Z, 0-9, dash and underscore.

How can I make it work?

Upvotes: 1

Views: 31

Answers (2)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626689

Three chars are required aftr user/ because [a-zA-Z0-9-_]\w\S match (and thus require) three chars to exist after user/.

You seem to need 

somesite\.com\/user\/[\w-]+

See the regex demo

Note that . should be escaped to match a literal dot. \w usually stands for [A-Za-z0-9_] by default, so you may shorten the pattern a bit using this shorthand character class.

Details

  • somesite\.com\/user\/ - a somesite.com/user/ substring
  • [\w-]+ - 1 or more word chars (letters, digits, _) and/or -

JS demo:

var ss = ['www.somesite.com/user/username', 'somesite.com/user/me', 'www.somesite.com/user'];
var rx = /somesite\.com\/user\/[\w-]+/g;
for (var s of ss) {
  console.log(s, "=>", s.match(rx));
}

Upvotes: 2

Praneet Nadkar
Praneet Nadkar

Reputation: 813

Try (somesite.com\/user\/[a-zA-Z0-9-_]+)

You can validate your regex here: https://regex101.com/

Upvotes: 1

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