problem using regular expressions with javascript

Question

I am using the following script but it's giving syntax errors which I am unable to figure out. Please help.

var str = "http://gaurav.com";

var patt1 = /^http\://[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(/\S*)?$/;
console.log(str.match(patt1));

Thanks, Gaurav

NullRef · Accepted Answer · 2011-06-17 11:41:23Z

2

Needs to be in /'s

var patt1 = /^http\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?$/;

Edit: also escape /s in the pattern.

edited Jun 17, 2011 at 11:41

answered Jun 17, 2011 at 11:31

NullRef

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2 Comments

Gaurav Pandey Over a year ago

Hey thanks for pointing that out... but it's yet not working.

user456814 Over a year ago

I tried it in Firebug, there's some kind of syntax error still, maybe unescaped regex meta character?

Rakesh Sankar · Accepted Answer · 2011-06-17 11:44:42Z

1

You pattern gives a "," in the string, could that be the problem???

Try this:

var str = "http://gaurav.com";
var patt1 = 'http:\/\/[A-Za-z0-9\.-]{3,}\.[A-Za-z]{3}';
console.log(str.match(patt1));

See the working example here

edited Jun 17, 2011 at 11:44

answered Jun 17, 2011 at 11:33

Rakesh Sankar

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Comments

Salman Arshad · Accepted Answer · 2011-06-17 11:39:06Z

0

You must escape all / as well:

var str = "http://gaurav.com";
var patt1 = /^http\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?$/;
//------------------^-^---------------------------------^
console.log(str.match(patt1));

answered Jun 17, 2011 at 11:39

Salman Arshad

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Comments

Bing · Accepted Answer · 2011-06-17 11:31:40Z

0

Quote the regexp string, that should fix the error. Haven't checked the expression, but that wasn't the question, right?

var patt1 = '^http\://[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(/\S*)?$';

answered Jun 17, 2011 at 11:31

Bing

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Comments

user1921 · Accepted Answer · 2011-06-17 11:36:30Z

0

This seems to work just fine - looks like you're just missing your quotes

var str = "http://gaurav.com";

var patt1 = "^http\://[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(/\S*)?$";
document.write(str.match(patt1));

Here's a jsfiddle link to the code you can play with http://jsfiddle.net/chuckplayer/fLrx8/

answered Jun 17, 2011 at 11:36

user1921

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