class Hash

Returns a new hash with all keys converted to symbols, as long as they respond to to_sym.

hash = { 'name' => 'Rob', 'age' => '28' }

hash.symbolize_keys
# => { name: "Rob", age: "28" }

# File lib/reustyle/hash.rb, line 33
def symbolize_keys
  transform_keys{ |key| key.to_sym rescue key }
end

Destructively convert all keys to symbols, as long as they respond to to_sym. Same as symbolize_keys, but modifies self.

# File lib/reustyle/hash.rb, line 40
def symbolize_keys!
  transform_keys!{ |key| key.to_sym rescue key }
end

Returns a new hash with all keys converted using the block operation.

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

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

# File lib/reustyle/hash.rb, line 9
def transform_keys
  result = {}
  each_key do |key|
    result[yield(key)] = self[key]
  end
  result
end

Destructively convert all keys using the block operations. Same as transform_keys but modifies self.

# File lib/reustyle/hash.rb, line 19
def transform_keys!
  keys.each do |key|
    self[yield(key)] = delete(key)
  end
  self
end