regular expresion remember matches - Javascript

Jeff wrote:
> I always have trouble with javascript regexes...
>
> I want to parse apart a string and remember the matches and use them
> elswhere.
>
> Say I have:
>
> var test_string='one_two-three';
>
> In perl I would do this;
>
> if($test_string=~/(.*)_(.*)-(.*)/){
> print $2;
> }
>
> I'm not sure how to do this in javascript. Does $1 only work in the
> replace function????

Um... I suck at Regular Expressions (always have). But maybe:

http://www.hunlock.com/blogs/An_Intr..._in_Javascript

http://www.regular-expressions.info/javascript.html

http://devedge-temp.mozilla.org/libr...de/regexp.html

http://www.evolt.org/node/36435

....can be of some assistance. Otherwise, just wait, someone will be
alone momentarily with your regexp.

Ah what the hell... I'll throw up a regular expression (which is sure to
be corrected/flawed):

var test_string = 'one_two-three';
var _regexp = /(\w+)_(\w+)-(\w+)/;
alert(test_string.replace(_regexp, '$2'))

That is basically the exact same thing you have. I am sure regexp gurus
can offer a better solution though, both in your example and mine.

--
-Lost
Remove the extra words to reply by e-mail. Don't e-mail me. I am
kidding. No I am not.

On May 12, 9:29 pm, Jeff <dont_bug...@all.uk> wrote:
> I want to parse apart a string and remember the matches and use them
> elswhere.

Use match method:
http://www.devarticles.com/c/a/JavaS...-JavaScript/6/
http://msdn2.microsoft.com/en-us/library/7df7sf4x.aspx



> var test_string='one_two-three';
> if($test_string=~/(.*)_(.*)-(.*)/){
> print $2;
> }
>
> I'm not sure how to do this in javascript.

var test_string='one_two-three',x;
if(x=test_string.match(/(.*)_(.*)-(.*)/)){
alert(x[2])
}

scripts.contact wrote:

> On May 12, 9:29 pm, Jeff <dont_bug...@all.uk> wrote:
>
>>I want to parse apart a string and remember the matches and use them
>>elswhere.
>
>
> Use match method:
> http://www.devarticles.com/c/a/JavaS...-JavaScript/6/
> http://msdn2.microsoft.com/en-us/library/7df7sf4x.aspx
>
>
>
>
>>var test_string='one_two-three';
>>if($test_string=~/(.*)_(.*)-(.*)/){
>>print $2;
>>}
>>
>>I'm not sure how to do this in javascript.
>
>
> var test_string='one_two-three',x;

What's with the ,x? Is that like doing this:

var test_string='one_two-three';
var x;

> if(x=test_string.match(/(.*)_(.*)-(.*)/)){
> alert(x[2])

Ahhh! Thanks!

OT. Is Martin Honnen still around?

Jeff

> }
>
>

On May 12, 9:50 pm, -Lost <maventheextrawo...@techie.com> wrote:

> http://www.hunlock.com/blogs/An_Intr..._Expressions_i...
> http://www.regular-expressions.info/javascript.html
> http://devedge-temp.mozilla.org/libr...vascript/1.5/g...
> http://www.evolt.org/node/36435

And:
http://msdn.microsoft.com/library/de...63906a7353.asp

Jeff wrote:
> OT. Is Martin Honnen still around?

I don't know about right this moment, but yeah, he's around.

--
-Lost
Remove the extra words to reply by e-mail. Don't e-mail me. I am
kidding. No I am not.

Jeff said the following on 5/13/2007 12:07 AM:
> scripts.contact wrote:

<snip>

>>
>> var test_string='one_two-three',x;
>
> What's with the ,x? Is that like doing this:
>
> var test_string='one_two-three';
> var x;

Yes, it is the same thing.

>> if(x=test_string.match(/(.*)_(.*)-(.*)/)){
>> alert(x[2])
>
> Ahhh! Thanks!
>
> OT. Is Martin Honnen still around?

Yes, you just don't see him as much anymore as you used to.

--
Randy
Chance Favors The Prepared Mind
comp.lang.javascript FAQ - http://jibbering.com/faq/index.html
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/