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Re: Palindrome array

by Jim (Curate)
on Dec 29, 2012 at 09:01 UTC ( #1010804=note: print w/replies, xml ) Need Help??

in reply to Palindrome array

This isn't C. In Perl, a palindrome is properly represented as a string, not an array of characters.

#!perl use strict; use warnings; my $string = "A Man, A Plan, A Canal -- Panama!"; my $letters = lc $string; $letters =~ s/\W//g; printf qq/"%s" %s a palindrome.\n/, $string, $letters eq reverse($letters) ? "is" : "isn't"; __END__ "A Man, A Plan, A Canal -- Panama!" is a palindrome.

If this is a homework assignment, tell your teacher you expect to be given more verisimilar programming problems. ;-)

If you're writing a Perl program to identify palindromic sequences in nucleic acids, you should still use strings, not arrays of characters, in my opinion.


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