Module: Gemmy::Patches::ArrayPatch::InstanceMethods::KeyBy

Defined in:
lib/gemmy/patches/array_patch.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.autotest ⇒ Object 



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# File 'lib/gemmy/patches/array_patch.rb', line 103

def self.autotest
  [1,2,3].key_by { |v| v % 2 } == { 1 => [1, 3], 0 => [2] }
end

Instance Method Details

#key_by ⇒ Object

facets



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# File 'lib/gemmy/patches/array_patch.rb', line 95

def key_by
  return to_enum(:key_by) unless block_given?
  h = Hash.new { |h,k| h[k] = [] }
  each do |v|
    h[yield(v)] << v
  end
  return h
end