I want to capture the "1" and "2" in " http://test.com/1/2 ". Here is my regexp /(?:\\/([0-9]+))/g
. The problem is that I only get ["/1", "/2"]
. According to http://regex101.com/r/uC2bW5 I have to get "1" and "1".
I'm running my RegExp in JS.
You have a couple of options:
Use a while
loop over RegExp.prototype.exec
:
var regex = /(?:\\/([0-9]+))/g, string = "http://test.com/1/2", matches = []; while (match = regex.exec(string)) { matches.push(match[1]); }
Use replace
as suggested by elclanrs :
var regex = /(?:\\/([0-9]+))/g, string = "http://test.com/1/2", matches = []; string.replace(regex, function() { matches.push(arguments[1]); });
In Javascript your "match" has always an element with index 0
, that contains the WHOLE pattern match. So in your case, this index 0 is /1
and /2
for the second match.
If you want to get your DEFINED first Matchgroup (the one that does not include the /
), you'll find it inside the Match-Array Entry with index 1
.
This index 0
cannot be removed and has nothing to do with the outer matching group you defined as non-matching
by using ?:
Imagine Javascript wrapps your whole regex into an additional set of brackets.
Ie the String Hello World
and the Regex /Hell(o) World/
will result in :
[0 => Hello World, 1 => o]
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