Add a new method to Array class : Array Extension « Array « Ruby

Add a new method to Array class

class Array
 def each_from_both_sides
    front_index = 0
    back_index = self.length-1
    while front_index <= back_index
      yield self[front_index]
      front_index += 1
      if front_index <= back_index
    yield self[back_index]
        back_index -= 1

new_array = []
[1,2,3,4,5].each_from_both_sides { |x| new_array << x }
p new_array                         # => [1, 5, 2, 4, 3]


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