From: Yossef Mendelssohn <ymendel@...>
Date: 2012-10-25T14:33:07+09:00
Subject: Re: Name/symbol/object type clash? What is happening here?

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On Wed, Oct 24, 2012 at 9:21 PM, 7stud -- <lists@ruby-forum.com> wrote:

> Todd B. wrote in post #1080981:
> >
> > Okay, I see, thanks.
> >
>
> Okay, you see what?  That was one of the worst responses I've ever read
> on this forum.  It completely missed the big picture.  Your example
> shows that ruby is a completely screwed up somewhere.  You can't have
> two constants with the same name, so your class should have overwritten
> the Struct.


Ruby is not screwed up, at least not in the ways you say it is. The `class
S` line isn't declaring a new class named S, it's reopening the class
created by Struct.new.

    S = Struct.new(:num)
    class S
      def show_num; puts "Show:#{self.num}"; end
    end

is like

    S = Struct.new(:num) do
      def show_num; puts "Show:#{self.num}"; end
    end

or similar enough to

    class S < Struct.new(:num)
      def show_num; puts "Show:#{self.num}"; end
    end

-- 
-yossef

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On Wed, Oct 24, 2012 at 9:21 PM, 7stud -- <span dir=3D"ltr">&lt;<a href=3D"=
mailto:lists@ruby-forum.com" target=3D"_blank">lists@ruby-forum.com</a>&gt;=
</span> wrote:<br><div class=3D"gmail_quote"><blockquote class=3D"gmail_quo=
te" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"=
>
Todd B. wrote in post #1080981:<br>
&gt;<br>
&gt; Okay, I see, thanks.<br>
&gt;<br>
<br>
Okay, you see what? =A0That was one of the worst responses I&#39;ve ever re=
ad<br>
on this forum. =A0It completely missed the big picture. =A0Your example<br>
shows that ruby is a completely screwed up somewhere. =A0You can&#39;t have=
<br>
two constants with the same name, so your class should have overwritten<br>
the Struct.</blockquote><div><br></div><div>Ruby is not screwed up, at leas=
t not in the ways you say it is. The `class S` line isn&#39;t declaring a n=
ew class named S, it&#39;s reopening the class created by Struct.new.</div>
<div><br></div><div>=A0 =A0 S =3D Struct.new(:num)</div><div>=A0 =A0 class =
S</div><div>=A0 =A0 =A0=A0<span style=3D"background-color:rgb(255,255,255);=
color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">def show_n=
um; puts &quot;Show:#{self.num}&quot;; end</span></div>
<div>=A0 =A0 end</div><div><br></div><div>is like</div><div><br></div><div>=
=A0 =A0 S =3D Struct.new(:num) do</div><div>=A0 =A0 =A0=A0<span style=3D"ba=
ckground-color:rgb(255,255,255);color:rgb(34,34,34);font-family:arial,sans-=
serif;font-size:13px">def show_num; puts &quot;Show:#{self.num}&quot;; end<=
/span></div>
<div>=A0 =A0 end</div></div><div><br></div><div>or similar enough to</div><=
div><br></div><div><div class=3D"gmail_quote"><div>=A0 =A0 class S &lt; Str=
uct.new(:num)</div><div>=A0 =A0 =A0=A0<span style=3D"background-color:rgb(2=
55,255,255);color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px=
">def show_num; puts &quot;Show:#{self.num}&quot;; end</span></div>
<div>=A0 =A0 end</div><div><br></div></div></div>-- <br>-yossef<br>

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