Or if the question you want to answer is "Is there a character that is repeated within the string?" then you can:

print "'$1' repeated\n" if "12345617890" =~ /(.).*?\1/;

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Prints:

'1' repeated

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DWIM is Perl's answer to Gödel

In reply to Re: Unique character in a string? by GrandFather
in thread Unique character in a string? by Anonymous Monk

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