Re: Can't match negated words.

Hi folks, I may have screwed my original post up. I wanted to simply reply but instead I seem to have deleted the original message. I amended my code as follows

if ($line =~ /(?:(?!throw).)/ )    
{
                        debug ("Doesn't contain throw");
}
[download]

yet it still printed the statement for the line

     
//throw OtherException
[download]

I've put '.*' at the start and end of the reg exp but it still doesn't see the throw in the throw line. Thanks, Mark.

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Re^2: Can't match negated words. by hv (Prior) on Jun 24, 2004 at 14:00 UTC
First, You haven't duplicated Abigail-II's expression correctly; if you do so, it will work correctly: `if ($line =~ /^(?:(?!throw).)$/s) { debug ("Doesn't contain throw"); }` [download] An alternative formulation, which I find slightly cleaner, is to recast it as a single negative lookahead: `if ($line =~ /^(?!.?throw)/) { ... }` [download] Hugo	[reply] [d/l] [select]
Re^3: Can't match negated words. by perlgags78 (Acolyte) on Jun 24, 2004 at 15:14 UTC
hi Hugo, I see that you've a ? before the throw. What function has this? Is the '?' associated with the .* or the throw? Also I'm having hassle getting return characters to appear in my posts so they kinda look like one line posts. Any ideas? Thanks, Mark.	[reply]