From: Robert Dober <robert.dober@...>
Date: 2006-09-26T22:06:50+09:00
Subject: Re: How to copy a method from one class to another

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On 9/26/06, Trans <transfire@gmail.com> wrote:
>
>
> Logan Capaldo wrote:
> > On Tue, Sep 26, 2006 at 05:24:48PM +0900, Robert Dober wrote:
> > > On 9/25/06, Gavin Kistner <gavin.kistner@anark.com> wrote:
> > > >
> > > ><SNIP>
> > > >Ruby's methods are not first-class functions like Lua or JavaScript
> > > >have. Other, first-class functions exist (procs/lambdas), but Method=
s
> > > >are not these.
> > >
> > >
> > > I tend to disagree, I do not know about Lua, but  for me Ruby's
> methods are
> > > pretty much first class
> > Sometimes people define first class in terms of the additional syntax
> > compared to other things you must use.
> > > <code>
> > > class A
> > >    def a; puts "#{self} =3D=3D 42"; end
> > > end
> > > class B < A
> > >    define_method :another_a, A.instance_method(:a)
> > > end
> > > AA =3D Class.new A
> > >
> > > A.new.a
> > > A.instance_method(:a).bind(AA.new).call
> > > B.new.another_a
> > > </code>
>
> They are Functor, but they are not 1st class
>
> Object.instance_method(:send).object_id =3D=3D
> Object.instance_method(:send).object_id
> =3D> false


Aha, I do not have the faintest idea what 1st class means - now because  I
follow suit to your knowledge - would you care to elaborate a little more?
I guess that the unidentity you state above might come from some wrapper
object dynamically allocated when getting the "object".

Note to Logan: not being able to bind the method to an object outside of th=
e
inheritance tree stuck me at first too, but I think it is a good thing.

OTOH it is somehow viaolating the idea of "MetaDuckTyping" (surely McCarthy
did not say that) meta applies to DuckTyping it is not the type of a
MetaDuck we are discussing ;)

Cheers
Robert

T.
>
>
>


--=20
Deux choses sont infinies : l'univers et la b=EAtise humaine ; en ce qui
concerne l'univers, je n'en ai pas acquis la certitude absolue.

- Albert Einstein

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