[ILUG] Regex Question

[Niall O Broin]

On 27 Sep 2004, at 16:47, John Allen wrote:

> # perl -pi -e 's|<div class="foo"></div>|<div 
> class="foo">TEST</div>|g' foobar.html

Ah John - would you ever read the man's original question? I reproduce 
the bit that makes this more than a completely trivial regex below.

>>>
>>> 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>

I also presume that his real source file is a little more complicated 
than the above but ICBW.




Niall