Method: Containers::RubyDeque#push_front

Defined in:
lib/containers/deque.rb

#push_front(obj) ⇒ Object

Adds an object at the front of the Deque.

d = Containers::Deque.new([1, 2, 3])
d.push_front(0)
d.pop_front #=> 0



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# File 'lib/containers/deque.rb', line 69

def push_front(obj)
  node = Node.new(nil, nil, obj)
  if @front
    node.right = @front
    @front.left = node
    @front = node
  else
    @front = @back = node
  end
  @size += 1
  obj
end