How can I extract only the integer from a String JavaScript

Question

I have a string that looks like:

var a = "value is 10 ";

How would I extract just the integer 10 and put it in another variable?

Is always the value equals 10? or it maybe be another? – Dec 16 '16 at 22:05 — , Dec 16 '16 at 22:05
Always the same format? "value is x"? – adamdc78 Dec 16 '16 at 22:05 — adamdc78, Dec 16 '16 at 22:05
no the value will not always be 10 – Abbas Mereally Dec 16 '16 at 22:06 — Abbas Mereally, Dec 16 '16 at 22:06

score 4 · Answer 1 · answered Dec 16 '16 at 22:06

4

You could use a regex:

var val = +("value is 10".replace(/\D/g, ""));

\D matches everything that's not a digit.

answered Dec 16 '16 at 22:06

Bálint

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score 1 · Answer 2 · answered Dec 16 '16 at 22:07

1

you can use regexp

var a = "value is 10 ";
var  num = a.match(/\d+/)[0] // "10"
console.log ( num ) ;

answered Dec 16 '16 at 22:07

score 1 · Answer 3 · answered Dec 16 '16 at 22:09

You can use some string matching to get an array of all found digits, then join them together to make the number as a string and just parse that string.

parseInt(a.match(/\d/g).join(''))

However, if you have a string like 'Your 2 value is 10' it will return 210.

score 0 · Answer 4 · edited Dec 16 '16 at 22:28

0

You do it using regex like that

const  pattern = /\d+/g;

const result = yourString.match(pattern);

edited Dec 16 '16 at 22:28

Dalorzo

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answered Dec 16 '16 at 22:08

Ahmed Ali

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`const` is JS version specific not supported by all browsers – Dalorzo Dec 16 '16 at 22:30

How can I extract only the integer from a String JavaScript

4 Answers4