Corion, your method is straightforward but suffers because it makes a copy of every value at once. You could still use max() but only have one hash copy present at a time just by switching to reduce().

my @hashes = ( $hash_w, $hash_x, $hash_y, $hash_z );
my $max = max( values %{shift @hashes } );
$max = reduce { max( $_[0], values %{$_[1]} ) }
    @hashes;

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In reply to Re^2: Getting Max Value from Different Hashes by diotalevi
in thread Getting Max Value from Different Hashes by neversaint

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