[Javascript] Re: Javascript probem in HTML Form

[Shawn Milo]

Flavio,

Once again, an excellent observation.
It does me a lot of good to have 
you look at my code.  :o)

I think the problems with:
/(\?|\&)rd=([^\&]*)/ 
would be:
1.  It doesn't match till the end
of the line, so it will not return
ONLY the desired parameter.  It will
return the desired parameter plus
any extra characters after it.

2.   ([^\&]*) doesn't match
the desired info being at the
end of the line.




Here is a correction on that regex, with
test code below.  It matches the value
given to rd= whether it is the first,
last, or somewhere in the middle.

/^.*(\?|\&)rd=([^?&$]*)(\?|&|$).*$/

Shawn


Tested example:
-------------------------

var testString;
var returnVal;



testString = '?something=fred&jack=jill&who=yourmom&rd=FOOT&gray=c0c0c0';
returnVal = testString.replace(/^.*(\?|\&)rd=([^?&$]*)(\?|&|$).*$/, '$2');
alert(returnVal);


testString = '?rd=FOOT&something=fred&jack=jill&who=yourmom&gray=c0c0c0';
returnVal = testString.replace(/^.*(\?|\&)rd=([^?&$]*)(\?|&|$).*$/, '$2');
alert(returnVal);

testString = '?something=fred&jack=jill&who=yourmom&gray=c0c0c0&rd=FOOT';
returnVal = testString.replace(/^.*(\?|\&)rd=([^?&$]*)(\?|&|$).*$/, '$2');
alert(returnVal);

----------------------------
End example





----- Original Message -----
From: Flavio Gomes <flavio at economisa.com.br>
Date: Fri, 21 May 2004 10:47:23 -0300
To: "[JavaScript List]" <javascript at LaTech.edu>
Subject: Re: [Javascript] Re: Javascript probem in HTML Form

> Shawn Milo wrote:
> 
> >I modified your style to my own readability preferences.  Hope you don't mind.
> >
> >Shawn
> >
> >
> >
> >(...)
> >
> >  var returnVal = location.search.replace(/^\?rd=(.*)$/, '$1');
> >  
> >
> I suggest a little change, because I believe that "rd" is not always 
> coming nor first nor last in location.search:  
>   I'm trying like crazy to make it work, but I can't o.o
> My idea would be the following:    
>      replace(/(\?|\&)rd=([^\&]*)/, '$2');
>  Searches for a "?" or "&" followed by "rd=" and then get everything 
> untill it finds a "&" (or the end of the line).
> But it doesnt worked.. do you know why Shawn?
> 
> 
> PS.: While writing the mail I got a working one, but, if you know, may you explain why the above one doesn't works?
>    replace(/(\?|\&).*rd=([^\&]*).*$/, '$2') 
> 
> -- 
> Flavio Gomes
> flavio at economisa.com.br
> 
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