Add method to Array class to convert an array to a hash : Array Extension « Array « Ruby






  1. Ruby
  2. Array
  3. Array Extension

Add method to Array class to convert an array to a hash


class Array
  def into_hash(h)
    unless size % 2 == 0
      raise StandardError, "Expected array with even number of elements"
    end
    0.step(size-1, 2) { |x| h[self[x]] = self[x+1] }
    h
  end
end

squares = [1,1,2,3,4,9]
results = {}
p squares.into_hash(results)                    # => {1=>1, 2=>3, 4=>9}

[1,1,2].into_hash(results)
# StandardError: Expected array with even number of elements








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