[ruby-talk:00556] Re: Question concerning modules (1)

On Tue, 03 Aug 1999, you wrote:
>Hi,
>
>From: [e-mail]
>Subject: [ruby-talk:00546] Question concerning modules (1)
>Date: Tue, 3 Aug 1999 12:49:27 +0200 (MET DST)
>

[...]

>
>`show' is foo's instance_method, not method.

Okay! But...

>
>> rbc0> Foo.instance_variables.include? "@ivar"
>> true
>> 
>> # Aha! `Foo' contains the instance variable.
>
>Yes. But it's not instance variable of Foo's instance.

Eh! That I don't fully understand! If it is not instance variable of
`Foo's instance, whose instance variable it is? :-////

[...]
 
>> rbc0> Foo.methods.include? :show
>> false
>> 
>> # Oops! `Foo' knows about instance variables, but not methods????
>
>Object#methods returns string array. You have to write `include? "show"'.

But that would not change anything, as I have found. Because I should
use `Foo.instance_methods.include? "show"'! :-)

[...]

>
>Cause foo's (singleton) class is extended by Foo, foo has the method `show'.
>

But why has this methods mutated to module functions? `Foo' is a
singleton class; not an instance, right? That is also true for `foo'.
If I extend a `Class' with features of a `Module', why I can use
these features like class methods/module functions?

>Hope this helps,

Much, but not enough ;-)

>--
>sorry for my broken english
>best regards
>Kazuhiro HIWADA ([e-mail])

\cle