From: Douglas Seifert <doug@...>
Date: 2012-07-03T22:23:36+09:00
Subject: Re: Accessor Methods with a Twist

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Maybe the OP is going for something like this:

# This module can be mixed in to a class
# that has a :name accessor to give it
# 'extra' functionality
module Named
  def output_name
    puts "Name: #{self.name}"
  end

  def append_to_name(str)
    self.name << str
  end
end

class Person
  include Named
  attr_accessor :name
  def initialize(name)
    @name = name
  end
end

p = Person.new('Doug')

p.output_name
p.append_to_name(" Foo")
p.output_name

The mixin here is silly, but it might give the OP some ideas.  In the mixin
methods, you can refer to self, which will be an instance of whatever class
has mixed in the module.

-Doug S

On Sun, Jul 1, 2012 at 10:10 AM, Jan E. <lists@ruby-forum.com> wrote:

> Doug Jolley wrote in post #1066902:
> > When Jan said that I hadn't fully grasped the concept of object
> > orientation, she wasn't just whistling Dixie.
>
> I'm actually a "he". ;-)
>
>
>
> I know that my understanding has been expanded greatly.
> > This
> > dialog has been extremely enlightening for me.  I need to go play with
> > some code now.  I have a whole new prospective.  Thanks so much to all
> > who
> > contributed.
>
> You're welcome. And I can assure you that you're not the only one
> struggling with object orientation. This is really a difficult topic.
> Even experienced programmers often get it wrong.
>
> And it's even more difficult to find an appropriate structure for a
> program. This is something you need a lot of experience for, you cannot
> learn it by reading some books or so.
>
> So keep it up! :)
>
> --
> Posted via http://www.ruby-forum.com/.
>
>

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Maybe the OP is going for something like this:<div><br></div><div># This mo=
dule can be mixed in to a class</div><div># that has a :name accessor to gi=
ve it</div><div># &#39;extra&#39; functionality</div><div><div>module Named=
</div>
<div>=A0 def output_name</div><div>=A0 =A0 puts &quot;Name: #{<a href=3D"ht=
tp://self.name">self.name</a>}&quot;</div><div>=A0 end</div><div><br></div>=
<div>=A0 def append_to_name(str)</div><div>=A0 =A0 <a href=3D"http://self.n=
ame">self.name</a> &lt;&lt; str</div>
<div>=A0 end</div><div>end</div><div><br></div><div><div>class Person</div>=
<div>=A0 include Named</div><div>=A0 attr_accessor :name</div><div>=A0 def =
initialize(name)</div><div>=A0 =A0 @name =3D name</div><div>=A0 end</div><d=
iv>end</div>
<div><br></div><div>p =3D Person.new(&#39;Doug&#39;)</div><div><br></div><d=
iv>p.output_name</div><div>p.append_to_name(&quot; Foo&quot;)</div><div>p.o=
utput_name</div></div><div><br></div><div>The mixin here is silly, but it m=
ight give the OP some ideas. =A0In the mixin methods, you can refer to self=
, which will be an instance of whatever class has mixed in the module.</div=
>
<div><br></div><div>-Doug S</div><br><div class=3D"gmail_quote">On Sun, Jul=
 1, 2012 at 10:10 AM, Jan E. <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>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">Doug Jolley wrote in post #1066902:<br>
<div class=3D"im">&gt; When Jan said that I hadn&#39;t fully grasped the co=
ncept of object<br>
&gt; orientation, she wasn&#39;t just whistling Dixie.<br>
<br>
</div>I&#39;m actually a &quot;he&quot;. ;-)<br>
<div class=3D"im"><br>
<br>
<br>
I know that my understanding has been expanded greatly.<br>
&gt; This<br>
&gt; dialog has been extremely enlightening for me. =A0I need to go play wi=
th<br>
&gt; some code now. =A0I have a whole new prospective. =A0Thanks so much to=
 all<br>
&gt; who<br>
&gt; contributed.<br>
<br>
</div>You&#39;re welcome. And I can assure you that you&#39;re not the only=
 one<br>
struggling with object orientation. This is really a difficult topic.<br>
Even experienced programmers often get it wrong.<br>
<br>
And it&#39;s even more difficult to find an appropriate structure for a<br>
program. This is something you need a lot of experience for, you cannot<br>
learn it by reading some books or so.<br>
<br>
So keep it up! :)<br>
<div class=3D"HOEnZb"><div class=3D"h5"><br>
--<br>
Posted via <a href=3D"http://www.ruby-forum.com/" target=3D"_blank">http://=
www.ruby-forum.com/</a>.<br>
<br>
</div></div></blockquote></div><br></div>

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