Is there an easy way of getting the union of 2 hashes? I know this can be done longhand with a loop, but I wondered if there was a better way. 

foreach (keys %a)
{
    $b{$_} = $a{$_};
}

While this works, I wondered if there was a better way. I know the equivalent with arrays is easy. 


@b = (@b,@a);

This might become significant for performance if one or other hash is not a real hash, but is tied to something.

Any thoughts?

In reply to Union of hashes by IvorW

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