Hi ,

The Hash can hold only unique keys and hence you can store the key as the split string .


      my $txt1 = "0101010101";
      my $count;
      my %hashofuniq;
      my @txt1 = split ('',$txt1);
      @hashofuniq{@txt1} = 1;
      foreach  (keys %hashofuniq){

        $count++; 

      }

      print "[$count]\n";

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

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