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I was too hasty in my assessment of the problem :-(

Yes, there are many unanswered questions - do I want to allow overlapping palindromes?, most likely don't want to allow them when they are 'shortened' versions of a larger one. And the algorithm, (generating all possible subtrings to examine), which is very time consuming, may not be the right way to go. There may even be a module on CPAN that already does this (there is a module that does palindromes for fasta strings) and it does answer some of the questions about overlapping and others as well.

Thanks again to everyone who responded. And to Roy Johnston for the regex solution - very nice!

Chris Yes, fishbot does it directly. I didn't know how to use the ??{ } construct - also forgot about the @- array for the position.

In reply to Re^2: Capture Lookahead by Cristoforo
in thread Capture Lookahead by Anonymous Monk

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