Make judicious use of dereferencing and the sort() function 
my %hash = (foo => [1..2], bar => [1..3], baz => [1]);
my @keys = sort { @{$hash{$a}} <=> @{$hash{$b}} } keys %hash;
print "$_ - @{$hash{$_}}", $/ for @keys;

__output__

baz - 1
foo - 1 2
bar - 1 2 3

[download]

HTH

_________
broquaint

In reply to Re: Sort Hash by Size of the Arrays it References by broquaint
in thread Sort Hash by Size of the Arrays it References by arunhorne

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