Method: HashTools#transform_keys_of

Defined in:
lib/hash_tools.rb

#transform_keys_of(any, &transformer) ⇒ Hash

Recursively convert hash keys using a block. using a passed block. The block will receive a hash key to be transformed and should return a transformed key For example, to go from uderscored notation to camelized:

h = {'foo_bar' => 1}
transform_keys_of(h) {|k| k.to_s.camelize(:lower) } # => {'fooBar' => 1}

Parameters:

  • any (Hash) —

    the Hash to transform

  • transformer —

    the block to apply to each key, recursively

Returns:

  • (Hash) —

    the transformed Hash



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# File 'lib/hash_tools.rb', line 115

def transform_keys_of(any, &transformer)
  case any
  when Array
    any.map { |e| transform_keys_of(e, &transformer) }
  when Hash
    h = {}
    any.each_pair do |k, v|
      h[transformer.call(k.to_s)] = transform_keys_of(v, &transformer)
    end
    h
  else
    any
  end
end