Delete array of keys in Ruby Hash

Question

How would I go about deleting an array of keys in a hash? For example, you can call:

hash.delete(some_key)

But how can I do this:

hash.delete([key1,key2,key3,...])

without needing to looping manually.

Answer 1

You can iterate over an array of keys and delete everyone of them:

[key1, key2, key3].each { |k| some_hash.delete k }

Can't remember any better solution.

Answer 2

This is exactly what you are looking for... You can do it like this without looping through the array unnecessarily.

keys_to_delete = [key1, key2, key3]
hash_array.except!(*keys_to_delete)

The result is stored in hash_array