Regex to retrieve numbers from string

Question

I have this string:

var string = "look1_slide2";

I would like to extract the the look number ie 1 and the slide ie 2 and save them in two different variables, I guess I could do it with a Regex but not sure how. Any help? The string will always have that format btw

Thanks!

What have you tried? it's very simple `var numbers = string.match(/\d+/g);` Check [Demo](https://jsfiddle.net/tusharj/jgbsnzpn/) — Tushar, Sep 03 '15 at 08:03
possible duplicate of [how to find a number in a string using javascript](http://stackoverflow.com/questions/1623221/how-to-find-a-number-in-a-string-using-javascript) — Hacketo, Sep 03 '15 at 08:06
I guess the main problem here is not the regex but variable assignment, right? — Wiktor Stribiżew, Sep 03 '15 at 08:20
well yes, but I think I still need to use a hash so the page is bookmarkable. — user1937021, Sep 03 '15 at 08:23
Play around on https://regex101.com/, matches are your friend! — Tro, Sep 03 '15 at 10:18

score 1 · Accepted Answer · answered Sep 03 '15 at 08:29

1

Since your string is always in that format you can simply read second and third entries of the returned regex matches array :

var string = 'look1_slide2';
var regex = /look(\d)_slide(\d)/g;

matches = regex.exec(string);
console.log(matches[1]);
console.log(matches[2]);

See RegExp.exec() doc

answered Sep 03 '15 at 08:29

SiCK

367
4
15

If OP does not need to return multiple matches with captured groups, why use `exec`? I think `match` is enough here (without `g` modifier). – Wiktor Stribiżew Sep 03 '15 at 08:31

score 0 · Answer 2 · answered Sep 03 '15 at 08:08

0

var txt = "#div-name-1234-characteristic:561613213213";
var numb = txt.match(/\d/g);
numb = numb.join("");
alert (numb);

This will print 1234561613213213

answered Sep 03 '15 at 08:08

I-Kod

199
1
11

Hi, thanks, but how can I save them both in two different variables? – user1937021 Sep 03 '15 at 08:10
The thing is how your number is represented? if your string pattern is look1_look2 then you can easily know that after '1' there is special character means no other number. You can differentiate numbers with this logic. 1 followed by '_' means 1 is alone and 2 followed by null character means 2 is alone save it with different variables. i.e Check the end of each number if next character is not number save into variable. – I-Kod Sep 03 '15 at 08:20

Regex to retrieve numbers from string

2 Answers2