#basically the same:
%h_1 = (a,1,b,2);
%h_2 = (c,3,d,4);
%concat = (%h_1,%h_2);
print "k: $_\tv: $concat{$_}\n" for sort keys %concat;
__END__
k: a v: 1
k: b v: 2
k: c v: 3
k: d v: 4
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