JavaScript: extracting string matching regular expression

Question

I am trying to extract the GMT number from the following text:

All times are GMT -3. The time now is 07:00 PM. Archive

I have the code:

data = "All times are GMT -3. The time now is 07:00 PM. Archive";
var myregex = /s\GMT([^"]*)./;
var matchArray = myregex.exec(data);

But it doesn't seem to work. In this example I am trying to get "-3" into matchArray How can I get the string after the space after GMT and before the period? Thanks!

I guess you mean \s, not s\. There is no s in front of GMT in your input string, that's why /s\GMT doesn't match. Maybe it even tries to match \ literally, I don't know. — Felix Kling
– Felix Kling, Commented Aug 12, 2014 at 22:16

anubhava · Accepted Answer · 2014-08-12 22:16:54Z

1

You need to use this regex:

var matchArray = /\bGMT *([^.]+)/.exec(data);
if (matchArray)
   console.log(matchArray[1]); //=> -3

answered Aug 12, 2014 at 22:16

anubhava

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3 Comments

Sonx Over a year ago

what happens if my time is -3.5? how can I make sure it will grab "-3.5"?

anubhava Over a year ago

You can use: /\bGMT +(.+?)(?=\. )/.exec(data); for that input.

Sonx Over a year ago

will that work for both -3 and -3.5? it's a variable so I don't know which number will be there

Gergo Erdosi · Accepted Answer · 2014-08-12 22:21:26Z

0

You can get it using this code:

var regex = /\bGMT\s+([-+][0-9]+)\b/;
var res = data.match(regex);

console.log(res[1]);

See JSFiddle.

answered Aug 12, 2014 at 22:21

Gergo Erdosi

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