Re: Regex::Reverse tricky test cases


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by dragonchild (Archbishop)

on May 17, 2005 at 12:46 UTC ( [id://457773]=note: print w/replies, xml )

Need Help??

Why would you want to reverse a regex? Isn't $string =~ reverse(qr/.../) the same as reverse(reverse($string) =~ qr/.../);?

In general, if you think something isn't in Perl, try it out, because it usually is. :-)
"What is the sound of Perl? Is it not the sound of a wall that people have stopped banging their heads against?"

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Re^2: Regex::Reverse tricky test cases by Roy Johnson (Monsignor) on May 17, 2005 at 13:11 UTC
sexeger. Some patterns — notably those with negative lookbehinds, which cannot be variable-length, but also others — work better backwards. Yes, you have to reverse the string to be matched, as well as the regex, and then you have to reverse whatever you captured. Sometimes it's still a win. Caution: Contents may have been coded under pressure.	[reply]

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