Jaschar Otto wrote at Wed, 11 Jun 2003 11:53:11 +0200:
> i've got a problem with regexp,
> i have a multiline string like
>
> this is
> a multi
> line string
>
>
>
> and i want to do a regexp that replaces
> everything that is NOT "a","b","c" or "d"
> with \s, except \n of course.
\s is not one character, it stands usually for a whole character class!
Do you mean an empty string ("") or just a blank (" ") instead?
> i got something like
>
> $string =~ s/![abcd]//g;
character class negation works with [^...],
in your case it would be
$string =~ s/[^abcd]//g;
> but that doesn't work, maybe because
> it recognizes ! not as negation but as
> character...
> so how to do it ?
Please read also
perldoc perlre
for details.
Greetings,
Janek
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