I would not call those major challenges ...
To test whether a string $str is 4 or more characters:
if (length($str) >= 4) { # ... }
To convert a string $str to lowercase (without "resorting to a regex"):
my $lower = lc $str;
Is that what you need?
In reply to Re: Improving a palindrome script...
by liverpole
in thread Improving a palindrome script...
by chinamox
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