Perl has 3 ways to iterate over a hash: "keys", "values", and "each". The first two do what you'd think; "each" in array context iterates over key/value pairs. All three return their results in an "apparently random" order.

You can also use "for" to iterate over a hash, same as you would over an array, but in that case the hash is converted to a list of alternating keys and values, which isn't as useful.

[edited to correct a typo]