tr does not interpolate.
Win8 Strawberry 5.30.3.1 (64) Fri 09/25/2020 23:09:19
C:\@Work\Perl\monks
>perl
my $kards = -99;
my $bad='$card$card';
my $card='K';
eval {print "eval is testing for $card in $bad \n";
$kards = $bad =~ tr/$card//; # tried also tr/$card/$card/; same
+ bad result.
};
print "1: Num of $card in $bad = $kards \n";
$king = $bad =~ tr/$card//;
print "2: Num of K in $bad is = $king \n";
__END__
eval is testing for K in $card$card
1: Num of K in $card$card = 10
2: Num of K in $card$card is = 10
Here, tr is counting the number of characters in the
'$cards' literal character set that are in the $bad string.
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