Javascript match

Question

How to get rid of the comma (,) in the output? Is there any better way to search for the url from the string or sentance.

alert("   http://www.cnn.com  df".match(/https?:\/\/([-\w\.]+)+(:\d+)?(\/([\w/_\.]*(\?\S+)?)?)?/));

Output from alert is:

http://www.cnn.com,,,,

Use google, or stack overflow search. It is your friend: http://stackoverflow.com/questions/3809401/what-is-a-good-regular-expression-to-match-a-url — Stephen, Aug 26 '12 at 02:22
Use `console.log` instead of `alert`. F12 opens dev console on most browsers. It's much more useful than blocking alerts. — zzzzBov, Aug 26 '12 at 02:45

score 1 · Answer 1 · answered Aug 26 '12 at 02:21

1

That happens because alert will convert the result of match, which is an array, to a string. To get the relevant part of the array use the following:

alert("   http://www.cnn.com  df".match(/https?:\/\/([-\w\.]+)+(:\d+)?(\/([\w/_\.]*(\?\S+)?)?)?/)[0]);

answered Aug 26 '12 at 02:21

João Silva

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score 0 · Accepted Answer · answered Aug 26 '12 at 02:23

You (*) in your regex makes return value an array with multiple matching results. You can do using ?:

alert("   http://www.cnn.com  df".match(/https?:\/\/(?:[-\w\.]+)+(?::\d+)?(?:\/(?:[\w/_\.]*(?:\?\S+)?)?)?/));

or get first value of a returned array:

alert("   http://www.cnn.com  df".match(/https?:\/\/([-\w\.]+)+(:\d+)?(\/([\w/_\.]*(\?\S+)?)?)?/)[0]);

score 0 · Answer 3 · answered Aug 26 '12 at 02:39

0

add a g modifire at the end of your regEx.

 alert(
"http://www.cnn.com df".match(/https?:\/\/([-\w\.]+)+(:\d+)?(\/([\w/_\.]*(\?\S+)?)?)?/g)
);

answered Aug 26 '12 at 02:39

Dariush Jafari

4,662
6
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Javascript match

3 Answers3