From: "Jan E." <lists@...>
Date: 2012-10-03T05:20:39+09:00
Subject: Re: still learning by doing - connecting rooms in a game

Sebastjan H. wrote in post #1078412:
> actually, I did get that error:)

OK, then you should have told us the exact error message.

We don't know what you're doing on your computer, what you've expected
to get and what you actually got. So we need specific information.
Something like:

I tried to set the attribute "name" with

zombie.name = 'somename'

and got a NoMethodError saying "undefined method `name=' for
#<Zombie:0x1d63f28>".

Then we know what's going on and can help fixing the error. But when you
say that the code "doesn't work", it tells us pretty much nothing. This
could mean anything from a crashed Ruby interpreter to a tiny encoding
problem. It's even more difficult when the code *does* work and just
doesn't meet your expections (that we don't know).

The error message is actually the most important part in debugging,
because it tells you exactly *what* went wrong. In this case it's saying
that your object doesn't have a method "name=". And that's all you need 
to know. Even if you knew nothing about Ruby and didn't have any access 
to other information, you could still fix the error just by doing what 
the message is telling you (which, of course, isn't really a good 
approach).

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