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Re: Finding longest palindrome from a string

by japhy (Canon)
on Aug 13, 2004 at 15:55 UTC ( #382732=note: print w/replies, xml ) Need Help??

in reply to Finding longest palindrome from a string

Because the golf isn't complete without an insanely short regex solution:
sub japhy { # 74 our$P="";pop=~m{(.+).?(??{reverse$1}) (?{length$P<length$&and$P=$&})^}xs;$P }
Update: inspired by ccn's array approach:
sub japhy { # 68 our@P="";pop=~m{(.+).?(??{reverse$ 1})(?{$P[length$&]=$&})^}xs;$P[-1] }
Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart

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Re^2: Finding longest palindrome from a string
by Jasper (Chaplain) on Aug 17, 2004 at 08:45 UTC
    I forgot to mention that one of the golf competitions had a palindrome slant. Terje's perlgolf competitions site. There are some nice solutions there, as usual. Shorter than japhy's! :)

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