From: "Sebastjan H." <lists@...>
Date: 2012-10-02T05:46:07+09:00
Subject: Re: still learning by doing - connecting rooms in a game

Jan E. wrote in post #1078238:
> Hi,
>
> the item does get pushed into the array, but when you call
> Player#satchel again, the variable @satchel is reset to ['test']. So the
> previous array with the new item will be overwritten.
>
> Check it:
>
> player = Player.new 'testname'
> player.satchel << 'testitem'
> p player.instance_variable_get :@satchel
> player.satchel  # this resets @satchel to ['test']
> p player.instance_variable_get :@satchel
>
> So you have to change those methods. This isn't good style, anyway,
> because a getter method is supposed to do nothing but get or calculate a
> certain value. It shouldn't change the object (except maybe caching of a
> calculated value). When you want to set default values, do it in the
> initialize method.

>> I didn't want to set a default value, the "test" in the satchel was
>> just my primitive way of testing whether the room and the player
>> communicate. And yes, I see now that it gets reset.

>> How should I change these methods? I am not looking for the easy way
>> out by you just telling me;) but I am puzzled and stuck yet again. Why >> does 
it get reset by just calling it?

>> I was dealing with instance variable modification in my last game where >> the 
player hp got modified constantly. I can't see the difference. I
>> guess it is back to books...

seba

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