On 10/24/07, Jesù¸ Gabriel y GaláÏ <jgabrielygalan / gmail.com> wrote:
> class Queue
>    def initialize
>       @buffer = []
>    end
>
>    def enqueue(element)
>       @buffer.unshift(element)
>    end
>
>    def dequeue
>       @buffer.pop
>    end
>
>    def empty?
>       @buffer.empty?
>    end
> end
>
> But, there's already a Queue implementation in ruby core, so I would
> use that, although that class is aimed at synchronizing threads so I
> might implement a simple queue like the above at some point if I need
> simple queue semantics.
> I would  corresponding class for Stack, with push/pop being delegated
> to array's push and pop :-). Or just use an array if the fact of
> having more methods than a stack is not a problem :-).
>
> Jesus.

You want to -- as mentioned elsewhere in this thread -- push it in the
front and take it out the back.  Interesting.  I guess it all comes
down to what direction you want to go.  I like to see the procession
moving towards the zeroth position and not to some indexth position.

If I was going to queue, it would be more like...

class Queue
  def initialize enum
    @list = enum if enum.is_a? Enumerable
  end
  def enqueue object
    @list << object
#haven't looked at C code, but
#I think this is the same as #push
  end
  def dequeue
    @list.shift
  end
  def cut_in_line object
    @list.unshift object
  end
  def bouncer_removes_last_guy
    @list.pop
  end

end


Todd