Re: grepable output bug

[MadHat Unspecific <madhat () unspecific com>]

Michael Pattrick wrote:
> On Wed, Jan 21, 2009 at 12:42 AM, MadHat Unspecific
> <madhat () unspecific com> wrote:
> >        p = grepvers;
> >        while((p = strchr(p, ','))) {
> >          p++;
> >        }
> >
> > This time, if we match a ',' we just move to the next character in p (p++;)
> > rather than replacing it with something else.  At least that is what I think
> > it does.  I am a perl programmer by day, php by night and I hack C/C++ when
> > necessary, so I could be wrong, but it does work.
>
> Hey MadHat,
>
> That is exactly, what you are doing, but that wont change the state of
> the string. You are simply moving where the pointer is pointing too.
> If you want to erase all commas without replacing them with anything
> you would have to do something like this:
>
> p = grepvers;
>   {
> char * p2 = grepvers;
>
> while(*p != NULL){
>   if ( *p != ',' ){
>     *p2 = *p;
>     p2++;
>   }
>   p++;
> }
>   }
>
> Although this is just an ugly spaghetti string hack.

Just for my own clarification, if I move the pointer ahead by one and
don't put anything in it's place, wouldn't it be effectively the same
thing? basically skipping the character.


-- 
MadHat (at) Unspecific.com
"The true man wants two things: danger and play.
 For that reason he wants woman, as the most dangerous plaything."
                          - Friedrich Nietzsche

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