Javascript Regex - Converting string to number

Question

I have string where I want to remove any letters and hyphens. I have a code like below,

var s = '-9d 4h 3m',
    t = '1-22';

var p = /[^0-9-]+/g;
    r = s.replace(p, ''),
    a = t.replace(p, '');

console.log(r, a);

Here I want to remove hyphen if it is in between the numbers and omit at first. Any help or suggestions?

And you want to remove trailing hypens as well, or just "between" the numbers ? — adeneo, May 21 '15 at 10:18
@AvinashRaj, To be simple, I want to display just numbers and remove any other characters in a string. Additionally if the string has hyphen at the beginning, no need to remove and consider it as a negative value. — moustacheman, May 21 '15 at 10:24

score 3 · Accepted Answer · answered May 21 '15 at 10:44

3

Much more simpler one without using | operator.

string.replace(/(?!^-)\D/g, "")

answered May 21 '15 at 10:44

Avinash Raj

I just thought of replacing with `\D`.. +1 :P – karthik manchala May 21 '15 at 10:46

score 1 · Answer 2 · answered May 21 '15 at 10:34

1

You can use the following regex:

var p = /[^0-9-]+|(?:(?!^)-)/g;

answered May 21 '15 at 10:34

karthik manchala

OMG, i just failed to combine both of the regexs. – Avinash Raj May 21 '15 at 10:40
@AvinashRaj happens.. :) – karthik manchala May 21 '15 at 10:41
I think that /[^0-9-]+|((?!^)-)/g would be enough, i.e. non-captive ?: is redundant – Igor Popov May 21 '15 at 10:42

score 0 · Answer 3 · answered May 21 '15 at 10:24

In your console log you put a comma between the variable but you need a plus like this. I have also change variable a so that it removes the -

var s = '-9d 4h 3m';
var t = '1-22';

var p = /[^0-9-]+/g;
var r = s.replace(p, '');
var a = t.replace("-", '');

console.log(r + " " + a);

score 0 · Answer 4 · edited May 23 '17 at 10:26

0

var s = '-9d 4h 3m',
s = s.replace(/\D/g,'');

edited May 23 '17 at 10:26

Community

answered May 21 '15 at 10:32

4 Answers4