[ILUG] Regex Question

[Gareth Eason]

	There is probably a better way, but I would crack out the perl on this one.

	open( FILE, "foobar.html" ) or die;
	open( OUTFILE, ">output.html" ) or die;
	my $counter = 0;

	while(<FILE>)
	{
		if( /<div class="foo"><\/div>/ )
		{
			$counter++;
			if( $counter == 3 )
			{
				$counter = 0;
				s/<div class="foo"><\/div>/<div class="foo">TEST<\/div>/;
			}
		}
		print OUTFILE $_;
	}


	Jobsa... (Usual disclaimers, typos, etc. apply, YMMV.)

	Best regards,
	-->Gar
			

Rory Winston wrote:
> Regex gurus,
> 
> I'm trying to do a simple substitute in Vim. I hav a HTML page with hundreds
> of lines like:
> 
> <div class="foo"></div>
> <div class="foo"></div>
> <div class="foo"></div>
> <div class="foo"></div>
> 
> What I would like to be able to do is replace every n'th element with
> something else. So if n = 3, then the result is:
> 
> <div class="foo"></div>
> <div class="foo"></div>
> <div class="foo">TEST</div>
> <div class="foo"></div>
> <div class="foo"></div>
> <div class="foo">TEST</div>
> 
> Does anybody know how I might achieve this?
> 
> Thanks in advance,
> Cheers,
> 
> Rory
>