Re: Confusion with Forwarrordable#delegate - throwing an er

What are you trying to do exactly? If you want to add a couple of =
delegations to an instance of MyQueue then maybe this is what you want =
to do:

# ... your class definition

def exercise(obj)
  puts "exercising #{obj}"
  puts obj.first
  obj.mypush 'foo'
  puts obj.first
  obj.clear
  puts obj.first
end

q1 =3D MyQueue.new
class << q1
  delegate [:clear, :first] =3D> :@queue
end

q2 =3D MyQueue.new
exercise q1 # should have first & clear methods delegated
exercise q2 # should complain at the first call of first

Hope this helps,

Mike

On 2013-04-07, at 2:50 AM, Love U Ruby <[e-mail]> wrote:

> require 'forwardable'
>=20
> class MyQueue
>=20
>  extend Forwardable
>  attr_reader :queue
>=20
>  def initialize
>    @queue =3D []
>  end
>=20
>  def_delegator :@queue, :push, :mypush
>=20
> end
>=20
> q =3D MyQueue.new
>=20
> q.instance_delegate [:clear, :first] =3D> @q
> #`<main>': undefined method `instance_delegate' for =
#<MyQueue:0x2119e48
> @queue=3D[]> (NoMethodError)
>=20
> q.delegate [:clear, :first] =3D> @q
>=20
> #`<main>': undefined method `delegate' for #<MyQueue:0x2109e40
> @queue=3D[]> (NoMethodError)
>=20
>=20
> Can you tell me what wrong I did? How to fix that?
>=20
> --=20
> Posted via http://www.ruby-forum.com/.

--=20

Mike Stok <[e-mail]>
http://www.stok.ca/~mike/

The "`Stok' disclaimers" apply.