Javascript replace regex using

Question

I need to change @x ( x a number) to x. How can I do that, I don't know js regex..

It's pretty straight forward, you can try to learn something about regex [here](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp) give it a try if you still face any problem comment here will be happy to help — Code Maniac, Apr 14 '19 at 03:23
Answers where already posted and I can't comment on the question, but [here is a link](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp) to regex in javascript if you want to learn more about it. — MSclavi, Apr 14 '19 at 03:20

score 0 · Answer 1 · answered Apr 14 '19 at 03:15

0

You can try like this.

var n = Number(s.replace(/\D+/, ''))

> var s = "@123";
undefined
> 
> var n = s.replace(/\D+/, '')
undefined
> 
> n
'123'
> 
> n = Number(n)
123
> 
> n + 7
130
>

answered Apr 14 '19 at 03:15

hygull

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score 0 · Answer 2 · answered Apr 14 '19 at 03:16

0

Just use replace like so:

 

const str = "@1235";
const num = str.replace("@", "");
console.log(num);

answered Apr 14 '19 at 03:16

Jack Bashford

43,180
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score 0 · Answer 3 · answered Apr 14 '19 at 03:34

You can use inbuilt replace function for this purpose, which can take both, literals and regex pattern as parameter.

var str = "@12345";
str.replace("@", "");

We can also use patterns in the replace parameter, if you have multiple values to be replaced.

var str = "@123#45";
str.replace(/[@#]/,"")     // prints "123#45" => removes firs occurrence only
str.replace(/[@#]/g,"")    // prints "12345"
str.replace(/\D/,"")       // prints "123#45"  => removes any non-digit, first occurrence
str.replace(/\D/g,"")      // prints "12345"  => removes any non-digit, all occurrence

g stands for global search
[@#] stands for either @ or #, you can add anything here
\D stands for anything other than digits

Javascript replace regex using

3 Answers3