We agree that there are 19 characters in the string... but your definition/usage of "unique" is indeed made very fuzzy when you say "I should get 19 characters total with 3 unique characters." I don't see how you get there:

arabic digit indicates instance of a char'
"x" indicates no repetition/dupe  (6); 
and roman numerals indicate distinct repeated chars (VI) AT THE FIRST 
+REPEAT

my $str = "PERL MONKS ROCKS!!!";
P  1      x
E  1      x
R  1            I
L  1      x
   1            repeated later
M  1      x
O  1            repeated later
N  1      x
K  1            repeated later
S  1            repeated later
   2            II
R  2            I
O  2            III
C  1      X
K  2            IV
S  2            V
!  1            VI
!  2            VI
!  3            VI

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In reply to Re: Unique Character by ww
in thread Unique Character by Latnam

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