Regex with dynamic digits number is not working

Question

I'm trying to create a regex that will work as the following pattern:

tariff_0 - false; tariff - false

tariff_0_0 - true; tariff_100_50 - true

I've read that we can trigger digits with [0-9]+ expression, but unfortunately, it is not working in my case.

Here is a link to my RegEx: RegEx

And my Regex: /tariff_[0-9]+_[0-9]+/

You should enable the global flag at the right top. See https://regexr.com/4jn4k — The fourth bird, Aug 23 '19 at 06:39
No need to post an answer, your pattern works :) The only thing missing was that the global flag was not enabled on regexr.com. — The fourth bird, Aug 23 '19 at 07:01

Prashanth Benny · Answer 1 · 2022-08-12T08:46:00.390

0

The issue with the current regular expression is that it stops finding matches at the first encounter.

Using the global flag would find as many matches as there are.

ex :

/tariff_[0-9]+_[0-9]+/g

Here, g is the global flag

edited Aug 12 '22 at 08:46

answered Aug 23 '19 at 06:47

Prashanth Benny

1,523
21
33

score 0 · Answer 2 · answered Aug 23 '19 at 06:52

0

you can try this pattern: /^tariff(_[0-9]){2,}$/

answered Aug 23 '19 at 06:52

David

61
4

score 0 · Answer 3 · answered Aug 23 '19 at 06:58

var str1 = 'tariff_0';
var str2 = 'tariff';
var str3 = 'tariff_0_0';
var str4 = 'tariff_100_50';
var str5 = 'tariff_100_500';
var patt = new RegExp("tariff_([0-9])+_([0-9])");
console.log(patt.test(str1));
console.log(patt.test(str2));
console.log(patt.test(str3));
console.log(patt.test(str4));
console.log(patt.test(str5));

Note:- This Regex will first check string contains _ >>> number is between [0-9] >>> the same process as above...

Regex with dynamic digits number is not working

3 Answers3