🎓 Transform Keys

Calliing .transform_keys on a hash to …well… transform the keys of the hash

some_hash = {
	key_1: "value 1",
	key_2: "value 2"
}

some_hash.transform_keys {|key| key.to_s.upcase}

# Outputs
# {"KEY_1"=>"value 1", "KEY_2"=>"value 2"}

There is also .deep_transform_keys which will apply the same block against nested hashes. This does not apply to arrays.