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I'm not convinced I like any of the above when it comes to readability. Here is what I came up with that might make it easier for a junior-level programmer to at least have half a clue as to what is going on (it being understood that my choice of variable names could be better):

sub id2path_boftx { my $id = shift or return q(); # my $chunk_length = length $id > 6 ? 3 : 2; my $chunk_length = $id < 1e6 ? 2 : 3; my $path_pat = '%0' . $chunk_length . 'd'; $path_pat = join('/', $path_pat, $path_pat, $path_pat); my $chunk_power = 10 ** $chunk_length; my $path = sprintf $path_pat, $id / ($chunk_power ** 2), ($id / $chunk_power) % $chunk_power, $id % $chunk_power; return $path; }

FWIW, it passes all 23 tests.

Update: Changed how $chunk_lentgh is determined. I like the numeric test better after looking at it for a while.

It helps to remember that the primary goal is to drain the swamp even when you are hip-deep in alligators.

In reply to Re: Can you make it nicer? by boftx
in thread Can you make it nicer? by choroba

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