javascript replace function...

[tascienu@ecoaches.com]

consider this code below:

var toremove = "some";
var tolook ="I am looking for some other text in this string toremove";

if i do this:

tolook = tolook.replace(/toremove/gi,'');

will to look replace the text inside the toremove variable, or will it
just replace the variable name?

thanks for your help...

[Rob B]

Re: javascript replace function...



You're using a regular expression literal - so the string "toremove" is,
erm, *literally* the pattern in question. If you want the regular
expression evaluated (as a JavaScript expression) at runtime, you'll
need to use the constructor:

var toremove = "some";
var re = new RegExp(toremove , 'gi');
var tolook ="I am looking for some other text in this string toremove";

tolook = tolook.replace( re, '');

http://www.webreference.com/js/column5/define.html

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[Mick White]

Re: javascript replace function...

tascienu@ecoach es.com wrote:
[color=blue]
> var toremove = "some";
> var tolook ="I am looking for some other text in this string toremove";
>
>
> tolook = tolook.replace(/toremove/gi,'');
>
> will to look replace the text inside the toremove variable, or will it
> just replace the variable name?
>[/color]

You *could* use eval():
tolook = tolook.replace( eval("/"+toremove+ "/gi"),'');
An appropriate use, I would say.
Mick

[Michael Winter]

Re: javascript replace function...

On Tue, 07 Dec 2004 16:49:29 GMT, Mick White
<mwhite13BOGUS@ rochester.rr.co m> wrote:

[snip]
[color=blue]
> tolook = tolook.replace( eval("/"+toremove+ "/gi"),'');
> An appropriate use, I would say.[/color]

I disagree. The RegExp constructor, which Rob mentioned, is the better
solution.

Mike

--
Michael Winter
Replace ".invalid" with ".uk" to reply by e-mail.

[Mick White]

Re: javascript replace function...

Michael Winter wrote:
[color=blue]
> On Tue, 07 Dec 2004 16:49:29 GMT, Mick White
> <mwhite13BOGUS@ rochester.rr.co m> wrote:
>
> [snip]
>[color=green]
>> tolook = tolook.replace( eval("/"+toremove+ "/gi"),'');
>> An appropriate use, I would say.[/color]
>
>
> I disagree. The RegExp constructor, which Rob mentioned, is the better
> solution.[/color]

The RegExp constructor has it drawbacks, I'm referring to regexes
compiled on the fly and those pesky escape characters.
Mick