How can I extract only the integer from a String JavaScript [duplicate]

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?

user6244995
– user6244995

2016-12-16 22:05:31 +00:00
Commented Dec 16, 2016 at 22:05 — user6244995
– user6244995, Commented Dec 16, 2016 at 22:05
Always the same format? "value is x"?

adamdc78
– adamdc78

2016-12-16 22:05:49 +00:00
Commented Dec 16, 2016 at 22:05 — adamdc78
– adamdc78, Commented Dec 16, 2016 at 22:05
no the value will not always be 10

Abbas Mereally
– Abbas Mereally

2016-12-16 22:06:38 +00:00
Commented Dec 16, 2016 at 22:06 — Abbas Mereally
– Abbas Mereally, Commented Dec 16, 2016 at 22:06
Please use the search.

Felix Kling
– Felix Kling

2016-12-16 22:28:53 +00:00
Commented Dec 16, 2016 at 22:28 — Felix Kling
– Felix Kling, Commented Dec 16, 2016 at 22:28

Bálint · Accepted Answer · 2016-12-16 22:06:03Z

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, 2016 at 22:06

Bálint

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Comments

user7126813 · Accepted Answer · 2016-12-16 22:07:32Z

1

you can use regexp

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

answered Dec 16, 2016 at 22:07

user7126813

Comments

djdduty · Accepted Answer · 2016-12-16 22:09:23Z

1

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.

answered Dec 16, 2016 at 22:09

djdduty

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Comments

Dalorzo · Accepted Answer · 2016-12-16 22:28:53Z

0

You do it using regex like that

const  pattern = /\d+/g;

const result = yourString.match(pattern);

edited Dec 16, 2016 at 22:28

Dalorzo

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answered Dec 16, 2016 at 22:08

Ahmed Ali

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1 Comment

Dalorzo Over a year ago

const is JS version specific not supported by all browsers

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