From: John Joyce <dangerwillrobinsondanger@...>
Date: 2007-06-17T03:35:14+09:00
Subject: Re: Error in ancestor?


On Jun 16, 2007, at 10:43 AM, Robert Dober wrote:

> On 6/16/07, John Joyce <dangerwillrobinsondanger@gmail.com> wrote:
>>
>> On Jun 16, 2007, at 8:56 AM, Robert Dober wrote:
>>
>> > Hi list
>> >
>> > I just observed this (and it cost me quite some effort to debug my
>> > code :( )
>> >
>> > 515/15 > ruby -ve 'class << Class::new; puts self; puts
>> > ancestors.inspect end'
>> > ruby 1.8.5 (2006-12-04 patchlevel 2) [i686-linux]
>> > #<Class:#<Class:0xb7dfae50>>
>> > [Class, Module, Object, Kernel]
>> >
>> >
>> > this seems to be in contradiction with
>> > http://www.ruby-doc.org/core/classes/Module.html#M001700
>> > stating
>> >  
>> --------------------------------------------------------------------- 
>> -
>> > -------
>> >  mod.ancestors → array
>> >
>> > Returns a list of modules included in mod (including mod itself).
>> >
>> > =============
>> >
>> >   module Mod
>> >     include Math
>> >     include Comparable
>> >   end
>> >
>> >   Mod.ancestors    #=> [Mod, Comparable, Math]
>> >   Math.ancestors   #=> [Math]
>> >  
>> --------------------------------------------------------------------- 
>> -
>> > -----
>> >
>> > Is this an error in doc or in behavior?
>> >
>> > Cheers
>> > Robert
>> >
>> >
>> > --
>> > You see things; and you say Why?
>> > But I dream things that never were; and I say Why not?
>> > -- George Bernard Shaw
>> >
>> What error?
> This error
> ruby -ve 'class << Class::new; puts ancestors.include?( self ) end'
> ruby 1.8.5 (2006-12-04 patchlevel 2) [i686-linux]
> false
> Robert
>
If you're expecting it to return true, it can't. Everything in the  
array is an instance, not the class itself.