[ILUG] Regex Question

[Niall O Broin]

On 27 Sep 2004, at 17:23, Lee Hosty wrote:

> On Mon, 27 Sep 2004, Lee Hosty wrote:
>
>> On Mon, 27 Sep 2004, John Allen wrote:
>>
>>> On Monday 27 September 2004 15:19, Gareth Eason wrote:
>>>> 	There is probably a better way, but I would crack out the perl on 
>>>> this
>>>> one.
>>>>
>>>
>>> Or
>>> # perl -pi -e 's|<div class="foo"></div>|<div 
>>> class="foo">TEST</div>|g' foobar.html
>>
>> perl -pi.bak -e 'if (!($. % 3)) { s|<div class="foo"></div>|<div 
>> class="foo">TEST</div>|g; }" foobar.html
>
> Bah, sorry. That last " should be a ' of course. Or just add:
>
> if !($.%3)
>
> to the end of Johns, like so:
>
> perl -pi -e 's|<div class="foo"></div>|<div class="foo">TEST</div>|g 
> if !($.%3)' foobar.html

Doesn't work either. Would work for the little example given, but AFAIR 
the original poster said he needed to change every third occurence of 
<div class="foo"></div> to  <div class="foo">TEST</div> and the above 
only works where the file looks just like the little sample he gave. As 
that is a pointless piece of HTML I think it's fair to assume that the 
real source files looks a little different.Using $. as a counter won't 
necessarily work.


Niall