From: Matthew Kerwin <matthew@...>
Date: 2013-03-16T06:25:34+09:00
Subject: Re: Confusion with Strings

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On Mar 16, 2013 7:10 AM, "Love U Ruby" <lists@ruby-forum.com> wrote:
>
> Love U Ruby wrote in post #1101762:
> > Hi,
> >
>
> > class A
> > end
> >
> > A.ancestors # => [A, Object, Kernel, BasicObject]
>
> My question is - how does `A` come in the output of `A.ancestors` ?
>

Based on my previous samples:

a.is_a? A #=> true
A.is_a? A #=> false

The first is true because A.ancestors.include? A

You can also do this:

def decl cls
  cls.ancestors.reverse.inject do |p,c|
    puts "class #{c} < #{p}"
    puts 'end'
  end
end
decl A

Note: I've ignored included modules.

Sent from my phone, so excuse the typos.

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<p>On Mar 16, 2013 7:10 AM, &quot;Love U Ruby&quot; &lt;<a href=3D"mailto:l=
ists@ruby-forum.com">lists@ruby-forum.com</a>&gt; wrote:<br>
&gt;<br>
&gt; Love U Ruby wrote in post #1101762:<br>
&gt; &gt; Hi,<br>
&gt; &gt;<br>
&gt;<br>
&gt; &gt; class A<br>
&gt; &gt; end<br>
&gt; &gt;<br>
&gt; &gt; A.ancestors # =3D&gt; [A, Object, Kernel, BasicObject]<br>
&gt;<br>
&gt; My question is - how does `A` come in the output of `A.ancestors` ?<br=
>
&gt;</p>
<p>Based on my previous samples:</p>
<p>a.is_a? A #=3D&gt; true<br>
A.is_a? A #=3D&gt; false</p>
<p>The first is true because A.ancestors.include? A</p>
<p>You can also do this:</p>
<p>def decl cls<br>
=A0 cls.ancestors.reverse.inject do |p,c|<br>
=A0=A0=A0 puts &quot;class #{c} &lt; #{p}&quot;<br>
=A0=A0=A0 puts &#39;end&#39;<br>
=A0 end<br>
end<br>
decl A</p>
<p>Note: I&#39;ve ignored included modules.<br></p>
<p>Sent from my phone, so excuse the typos.</p>

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