From: Peter Hickman <peterhickman386@...>
Date: 2013-04-30T00:43:21+09:00
Subject: Re: New Rexx like data structure

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On 29 April 2013 16:33, Robert Klemme <shortcutter@googlemail.com> wrote:

> We can only make it work if you accept always getting an OpenStruct in
> return
>
> irb(main):011:0> class OpenStruct
> irb(main):012:1> alias _method_missing method_missing
> irb(main):013:1> def method_missing(*a,&b) x=_method_missing(*a,&b);
> x.nil? ? send("#{a.first}=", self.class.new) : x end
> irb(main):014:1> end
> => nil
> irb(main):015:0> o=OpenStruct.new
> => #<OpenStruct>
> irb(main):016:0> o.foo.bar=123
> => 123
> irb(main):017:0> o
> => #<OpenStruct foo=#<OpenStruct bar=123>>
>
>
Hmm. That doesn't seem to work for me in 1.8.7 or 1.9.2

ruby-1.9.2-p290 :001 > class OpenStruct
ruby-1.9.2-p290 :002?>   alias _method_missing method_missing
ruby-1.9.2-p290 :003?>   def method_missing(*a,&b)
x=_method_missing(*a,&b); x.nil? ? send("#{a.first}=", self.class.new) : x
end
ruby-1.9.2-p290 :004?>   end
 => nil
ruby-1.9.2-p290 :005 >
ruby-1.9.2-p290 :006 >   o=OpenStruct.new
 => #<OpenStruct:0x00000100a9c3a0>
ruby-1.9.2-p290 :007 > o.foo.bar=123
NoMethodError: undefined method `foo' for #<OpenStruct:0x00000100a9c3a0>
from (irb):3:in `method_missing'
from (irb):7
from /Users/peterhickman/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in `<main>'
ruby-1.9.2-p290 :008 > o
 => #<OpenStruct:0x00000100a9c3a0>

Same error in both

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<div dir=3D"ltr">On 29 April 2013 16:33, Robert Klemme <span dir=3D"ltr">&l=
t;<a href=3D"mailto:shortcutter@googlemail.com" target=3D"_blank">shortcutt=
er@googlemail.com</a>&gt;</span> wrote:<br><div class=3D"gmail_extra"><div =
class=3D"gmail_quote">
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;p=
adding-left:1ex"><div dir=3D"ltr">We can only make it work if you accept al=
ways getting an OpenStruct in return<br>
<div class=3D"gmail_extra"><div><br></div><div><div>irb(main):011:0&gt; cla=
ss OpenStruct</div><div>irb(main):012:1&gt; alias _method_missing method_mi=
ssing</div>
<div>irb(main):013:1&gt; def method_missing(*a,&amp;b) x=3D_method_missing(=
*a,&amp;b); x.nil? ? send(&quot;#{a.first}=3D&quot;, self.class.new) : x en=
d</div><div>irb(main):014:1&gt; end</div><div>=3D&gt; nil</div><div>irb(mai=
n):015:0&gt; o=3DOpenStruct.new</div>

<div>=3D&gt; #&lt;OpenStruct&gt;</div><div>irb(main):016:0&gt; o.foo.bar=3D=
123</div><div>=3D&gt; 123</div><div>irb(main):017:0&gt; o</div><div>=3D&gt;=
 #&lt;OpenStruct foo=3D#&lt;OpenStruct bar=3D123&gt;&gt;</div></div><div cl=
ass=3D"im">
<div><br></div></div></div></div></blockquote><div><br></div><div style>Hmm=
. That doesn&#39;t seem to work for me in 1.8.7 or 1.9.2</div><div style><b=
r></div><div><div>ruby-1.9.2-p290 :001 &gt; class OpenStruct</div><div>
ruby-1.9.2-p290 :002?&gt; =A0 alias _method_missing method_missing</div><di=
v>ruby-1.9.2-p290 :003?&gt; =A0 def method_missing(*a,&amp;b) x=3D_method_m=
issing(*a,&amp;b); x.nil? ? send(&quot;#{a.first}=3D&quot;, self.class.new)=
 : x end</div>
<div>ruby-1.9.2-p290 :004?&gt; =A0 end</div><div>=A0=3D&gt; nil=A0</div><di=
v>ruby-1.9.2-p290 :005 &gt;=A0</div><div>ruby-1.9.2-p290 :006 &gt; =A0 o=3D=
OpenStruct.new</div><div>=A0=3D&gt; #&lt;OpenStruct:0x00000100a9c3a0&gt;=A0=
</div><div>ruby-1.9.2-p290 :007 &gt; o.foo.bar=3D123</div>
<div>NoMethodError: undefined method `foo&#39; for #&lt;OpenStruct:0x000001=
00a9c3a0&gt;</div><div><span class=3D"" style=3D"white-space:pre">	</span>f=
rom (irb):3:in `method_missing&#39;</div><div><span class=3D"" style=3D"whi=
te-space:pre">	</span>from (irb):7</div>
<div><span class=3D"" style=3D"white-space:pre">	</span>from /Users/peterhi=
ckman/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in `&lt;main&gt;&#39;</div><di=
v>ruby-1.9.2-p290 :008 &gt; o</div><div>=A0=3D&gt; #&lt;OpenStruct:0x000001=
00a9c3a0&gt;=A0</div>
</div><div><br></div><div style>Same error in both</div><div style>=A0</div=
></div></div></div>

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