Here's a basic, non-golf implementation as a starter.
#!/usr/bin/perl -w
use strict;
my $secret = shift;
until (length $secret == 1) {
print "$secret\n";
$secret = tpr($secret);
}
print "$secret\n";
sub tpr {
my @digits = split //, shift;
my $not_so_secret;
while (my @pair = splice @digits, 0, 2) {
unshift @digits, $pair[1]
unless !@digits;
my $res = $pair[0] + $pair[1];
until ($res <= 9) {
my $cpy = $res;
$res = 0;
for (split //, $cpy) {
$res += $_;
}
}
$not_so_secret .= $res;
}
return $not_so_secret;
}
--
my one true love
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