CODEWITHSUNDEEP
javascriptregex
lakshmiravali rimmalapudi
lakshmiravali rimmalapudi

Reputation: 493

Extract substring from a string using regex in javascript

I am new to javascript, How to extract substring that matches a regex in a string in javascript?

For example in python:

version_regex =  re.compile(r'(\d+)\.(\d+)\.(\d+)')
line = "[2021-05-29] Version 2.24.9"
found = version_regex.search(line)
if found:
  found.group() // It will give the substring that macth with regex in this case 2.24.9

I tried these in javascript:

let re = new RegExp('^(\d+)\.(\d+)\.(\d+)$');
let x = line.match(re);

but I am not getting the version here.

Thanks in advance.

Upvotes: 5

Views: 7297

Answers (1)

Guerric P
Guerric P

Reputation: 31805

You can use RegExp.prototype.exec which returns an Array with the full match and the capturing groups matches:

const input = '[2021-05-29] Version 2.24.9';

const regex = /(\d+)\.(\d+)\.(\d+)/;

let x = regex.exec(input);

console.log(x);

Upvotes: 10

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