From: Paet Worlds II <paetilium@...>
Date: 2012-01-23T02:24:30+09:00
Subject: Re: Why do I receive this error?

Dave Aronson wrote in post #1042042:
> On Sun, Jan 22, 2012 at 11:42, Paet Worlds II <paetilium@live.com>
> wrote:
>
>> And here is the error I get:
>>
>> C:\Users\Paetilium\Desktop\RoboSteve\RoboEngine.rb:5:in `initialize':
>> uninitialized constant RoboEngine::Init (NameError)
>
> What the error message is saying is that within the context of
> RoboEngine::initialize, it has no clue what Init is, and the first
> letter is uppercase so it's taking it as a constant.  There are (at
> least) two ways you can fix this.
>
> The horrible ugly klugy way that should make everyone want to rinse
> their eyeballs in bleach for having read it, is to make Init a global
> variable.  This is So Wrong that I'm not going to tell you how, though
> you could easily Google it.
>
> The cleaner way would be to make Init, within RoboEngine#initialize, a
> *parameter*.  (Of course, you'd then lowercase the name, at least the
> first letter, so it's no longer a constant.)  That has many
> advantages.  Mainly, you will certainly know what it is, because it's
> been passed in.  Also, the caller won't have to have set up something
> specifically called Init, it can call it whatever it wants, and even
> have several of them to choose from at call time.
>
> Note that you'll have the same problem with ThoughtP in
> Initialization#action1.
>
> Any time you have Ruby complaining about not knowing what something
> is, like method missing, uninitialized constant, etc., ask yourself:
> how is it supposed to know, and is that good clean engineering or a
> horrible quick and dirty kluge, in which case what would be better?
>
> -Dave





Well.. I tried that and received:

C:\Users\PandE\Desktop\RoboSteve\RoboEngine.rb:5:in `initialize': 
undefined local variable or method `init' for #<RoboEngine:0x2f7f2faa> 
(NameError)
        from C:\Users\PandE\Desktop\RoboSteve\RoboEngine.rb:58:in `new'
        from C:\Users\PandE\Desktop\RoboSteve\RoboEngine.rb:58

I mean... I don't even know what "#<0x2f7f2faa> means...

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