Why map in void context? mkdir $DIR{$_} for sort { length $DIR{$a} <=> length $DIR{$b} } keys %DIR; But you're not using the hash keys for anything other than accessing the hash elements. mkdir $_ for sort { length $a <=> length $b } values %DIR; That could be done with a Schwartzian transform. mkdir $_->[0] for sort { $a->[1] <=> $b->[1] } map [ $_, length $_ ], values %DIR; Finally, though I may be wrong, it appears to me due to your peculiar definition of order that what you really want to do is mkdir $_ for sort { $a =~ tr[/][] <=> $b =~ tr[/][] } values %DIR; Or with a Schwarzian transform: mkdir $_->[0] for sort { $a->[1] <=> $b->[1] } map [ $_, tr[/][] ], values %DIR; Update: good point; MrNobo1024++

Makeshifts last the longest.

In reply to Re: Pascucci Paradigm for ordered operations on a homogenous hash (specificlaly, mkdir from hash) by Aristotle
in thread Pascucci Paradigm for ordered operations on a homogenous hash (specificlaly, mkdir from hash) by JRPascucci

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