You're on the right track, but I think this could be made more perl-ish again ...

my $text = '0101010101';
my %hash;
@hash{ split '', $text } = 1;
print scalar keys %hash, "\n";

[download]

 

perl -le 'print+unpack("N",pack("B32","00000000000000000000001000110111"))'

In reply to Re: Re: number of unique characters in a string by rob_au
in thread number of unique characters in a string by Anonymous Monk

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