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Re: Common Perl Pitfalls

by muba (Priest)
on Apr 29, 2012 at 19:32 UTC ( #967968=note: print w/ replies, xml ) Need Help??


in reply to Common Perl Pitfalls

while($string=~ m/reg(ex)/) { $string=~ s/$1/ister/; }

That frightens me a bit. Your substitution replaces the first occurance "ex" with "ister" in the string, no matter whether "ex" is part of "regex" or something else:

my $string = "Sometimes there are extra effects you didn't foresee whe +n using a regex."; while($string=~ m/reg(ex)/) { $string=~ s/$1/ister/; } print $string;

Output:

Sometimes there are istertra effects you didn't foresee when using a r +egister.

Istertra?


Comment on Re: Common Perl Pitfalls
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Re^2: Common Perl Pitfalls
by Joe_ (Beadle) on May 14, 2012 at 22:21 UTC

    You are quite right. It's a terrible mistake on my part. I will edit it.

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