Method: Hash#deep_transform_keys

Defined in:

activesupport/lib/active_support/core_ext/hash/keys.rb

#deep_transform_keys(&block) ⇒ Object

Returns a new hash with all keys converted by the block operation. This includes the keys from the root hash and from all nested hashes and arrays.

hash = { person: { name: 'Rob', age: '28' } }

hash.deep_transform_keys{ |key| key.to_s.upcase }
# => {"PERSON"=>{"NAME"=>"Rob", "AGE"=>"28"}}

# File 'activesupport/lib/active_support/core_ext/hash/keys.rb', line 65

def deep_transform_keys(&block)
  _deep_transform_keys_in_object(self, &block)
end