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@sorted = sort {$$a{"key"} <=> $$b{"key"} } @unsorted;

@sorted = sort {$$a{"least_signifigant_key"} <=> $$b{"least_signifigan
+t_key"}} @unsorted;
[...]
@moresorted = sort{$$a{"most_signifigant_key"} <=> $$b{"most_signifiga
+nt_key"}} @sorted;

sub multi_key_sort {  # pass me two references to arrays
 my $array = shift;   # the first to the array that needs sorting..
...

my @sorted_array = &multi_key_sort(\@unsorted_array,\@array_of_keys);
# @array_of_keys in order from least to most signifigant