From: Corey Konrad <0011@...>
Date: 2007-03-17T07:58:15+09:00
Subject: Re: yield

Chad Perrin wrote:
> On Sat, Mar 17, 2007 at 07:36:21AM +0900, Corey Konrad wrote:
>> >> why is that, cant yield be used with arguments?
>> 
>> oh ok, my understanding for some reason was that the method was going to 
>> remmeber that i set arg to "ball" so that when i used printer with the 
>> block that "ball" would still be in arg. So is that why it isnt working, 
>> is because when i call the printer method the second time the value 
>> stored in arg is destroyed?
> 
> I'm just guessing here, but . . .
> 
> It looks like you're expecting something akin to class behavior from a
> method.  Perhaps what you want to do is something more like this:
> 
> class Printer
>   def initialize(arg)
>     @arg = arg
>   end
> 
>   def iterator_thingie
>     yield @arg
>   end
> end
> 
> printer = Printer.new("ball")
> printer.iterator_thingie {|word| puts word}
> 
> 
> Then again, maybe that's not the kind of behavior you want.

what i am basically trying to understand is:

When i do printer("ball") i am putting the string ball in the arg 
variable of the printer method.

When i call the printer method with the block afterwards what happened 
to my string i stored in arg? Was it destroyed or when i called the 
printer method for the second time did ruby create a whole new arg 
variable with nothing in it and thats why the way i did it didnt work? 
Do you know what i mean i am trying to understand why what i did didnt 
work.


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