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Re^2: Can't match negated words.

by hv (Parson)
on Jun 24, 2004 at 14:00 UTC( #369363=note: print w/replies, xml ) Need Help??


in reply to Re: Can't match negated words.
in thread Can't match negated words.

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"); }

An alternative formulation, which I find slightly cleaner, is to recast it as a single negative lookahead:

if ($line =~ /^(?!.*?throw)/) { ... }

Hugo

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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.

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