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Re: Replace method

by virtualsue (Vicar)
on Mar 13, 2006 at 01:01 UTC ( #536175=note: print w/ replies, xml ) Need Help??

in reply to Replace method

You've received a working answer, now for a little explanation. With the code above, you ended up with $mdl = 1 and $page has its contents clobbered (i.e., changed to ""). Substitution (s///) returns the number of successful matches that occurred, and that's what you (inadvertently) said you wanted.

If you change the code to (my $mdl = $page) =~ s/\.tmpl$/\.pl/;, then the first thing that happens is that $mdl is set to the value of $page, and because it is the left-hand side of the assignment, $mdl then becomes the target of the =~ binding operation. Note the '$' anchor borisz and I added to the regex - this helps ensure you only change what you intend. What if $page = "my.tmplate.tmpl"?

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Re^2: Replace method
by rsiedl (Friar) on Mar 13, 2006 at 01:20 UTC
    Thanks virtualsue, this was an extremely useful explanation and exactly what i was after. If I could double + I would.

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