my @sorted_keys = %hash.keys.sort

##</code><code>##

%hash.keys.sort({ %hash{$_} });

##</code><code>##

# return a random, anonymous hash:
sub h {
   return %( (1..10).pick(*) )
}

# and get the keys sorted numerically by value:
my @keys = h().sort( { .value })>>.key