The main problem is that it doesn't deal with overlapping regexes very well, (i.e. your regex matches parts of your replacement string).

Suppose you have the string: 

"The wodchuck at the zo stod on the stoop";

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You realize that it will only make sense after replacing the first three 'o's with 'oo's 
my $str = "The wodchuck at the zo stod on the stoop";
$str =~ s/o/oo/i for 1..3;
print "$str\n";

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Oops, that yields: 
The woooodchuck at the zo stod on the stoop

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The other solutions would have produced: 
The woodchuck at the zoo stood on the stoop

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-Blake

In reply to Re3: pattern matching a limited number of times by blakem
in thread pattern matching a limited number of times by bob49

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