From: Matthew Kerwin <matthew@...>
Date: 2013-03-16T05:35:04+09:00
Subject: Re: Confusion with Strings

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On Mar 15, 2013 11:42 PM, "Love U Ruby" <lists@ruby-forum.com> wrote:
>
> Hi,
>
> I have some confusion with "ancestor" method.
>
> Can you help me out to clear the concept?
>
> class A
> end
>
> A.ancestors # => [A, Object, Kernel, BasicObject] <~~ Here why came? I
> actually expect the output as below one.
>
> A.class.ancestors # => [Class, Module, Object, Kernel, BasicObject]

Think of this:

a = A.new
a.class #=> A
a.class.ancestors #=> [A, Object, Kernel, BasicObject]
a.is_a? Object #=> true
a.is_a? Module #=> false

A.class #=> Class
A.class.ancestors #=> [Class, Module, Object, Kernel, BasicObject]
A.is_a? Object #=> true
A.is_a? Module #=> true

So x.ancestors means "list of classes and modules x extends/includes" and
y.class.ancestors means "list of classes and modules y.is_a? or
y.instance_of?"

This question should be in a separate thread.

Sent from my phone, so excuse the typos.

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<p>On Mar 15, 2013 11:42 PM, &quot;Love U Ruby&quot; &lt;<a href="mailto:lists@ruby-forum.com">lists@ruby-forum.com</a>&gt; wrote:<br>
&gt;<br>
&gt; Hi,<br>
&gt;<br>
&gt; I have some confusion with &quot;ancestor&quot; method.<br>
&gt;<br>
&gt; Can you help me out to clear the concept?<br>
&gt;<br>
&gt; class A<br>
&gt; end<br>
&gt;<br>
&gt; A.ancestors # =&gt; [A, Object, Kernel, BasicObject] &lt;~~ Here why came? I<br>
&gt; actually expect the output as below one.<br>
&gt;<br>
&gt; A.class.ancestors # =&gt; [Class, Module, Object, Kernel, BasicObject]</p>
<p>Think of this:</p>
<p>a = A.new<br>
a.class #=&gt; A<br>
a.class.ancestors #=&gt; [A, Object, Kernel, BasicObject] <br>
a.is_a? Object #=&gt; true<br>
a.is_a? Module #=&gt; false</p>
<p>A.class #=&gt; Class<br>
A.class.ancestors #=&gt; [Class, Module, Object, Kernel, BasicObject]<br>
A.is_a? Object #=&gt; true<br>
A.is_a? Module #=&gt; true</p>
<p>So x.ancestors means &quot;list of classes and modules x extends/includes&quot; and y.class.ancestors means &quot;list of classes and modules y.is_a? or y.instance_of?&quot;<br>
 <br>
This question should be in a separate thread.</p>
<p>Sent from my phone, so excuse the typos.</p>

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