in reply to Re^5: Finding repeat sequences.
in thread Finding repeat sequences.
Thought you might like to see my refactoring of your algorithm.
Same performance, but somewhat clearer implementation:
hdbm => sub { my $r = shift; my $i = 1; until( substr( $$r, $i ) eq substr( $$r, 0, -$i ) ) { my $j = index( $$r, substr( $$r, 0, $i ), $i+1 ); $i = $j > 0 ? $j : ++$i; } return substr( $$r, 0, $i ) },
Specifically, it avoids the unfounded "infinite loop" charge without needing to introduce a redundant test.
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