From: Aleksey V Zapparov <ixti@...>
Date: 2012-07-02T03:22:16+09:00
Subject: Re: Question on Learning Ruby the Hard Way

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On Mon, 2 Jul 2012 01:38:30 +0900
"Jan E." <lists@ruby-forum.com> wrote:

> Calling "method" with a method name as a Symbol creates a Method
> object for this method. This object can then be passed around and
> called at any time (by calling the "call" method):
>=20
> class A
>   def f
>     puts "f called"
>   end
> end
>=20
> a =3D A.new
> f =3D a.method(:f)  #create a Method object for method "f"
> p f
> f.call()          # call Method object (without arguments)
>=20
> See
> http://ruby-doc.org/core-1.9.3/Object.html#method-i-method
> http://ruby-doc.org/core-1.9.3/Method.html

Michael, please notice that this Method object is bounded to the object
it was initiated from:

class Foo
  def initialize
    @i =3D 0
  end

  def bar
    @i +=3D 1
  end
end

o =3D Foo.new
m =3D o.method :bar

o.bar  # =3D> 1
m.call # =3D> 2
m.call # =3D> 3
o.bar  # =3D> 4


--=20
Sincerely yours,
Aleksey V. Zapparov A.K.A. ixti
FSF Member #7118
Mobile Phone: +34 677 990 688
Homepage: http://www.ixti.net
JID: zapparov@jabber.ru

*Origin: Happy Hacking!

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