How can I join two hashes in Perl without using a loop?

Question

How do I append hash a to hash b in Perl without using a loop?

Answer 1

If you mean take the union of their data, just do:

%c = (%a, %b);

Answer 2

You can also use slices to merge one hash into another:

@a{keys %b} = values %b;

Note that items in %b will overwrite items in %a that have the same key.