From: Robert Klemme <shortcutter@...>
Date: 2008-09-11T15:33:24+09:00
Subject: Re: pass by reference in each loop

On 11.09.2008 03:24, Xiong Chiamiov wrote:
> Anton Ivanov wrote:
>> Xiong Chiamiov wrote:
>>
>>> The problem is that, unlike practically everything else in Ruby, each
>>> loops don't pass by reference, so my assignments get lost.
>>>
>> You're confused.  The variable chunk contains a reference to an object. 
>> You are assigning a different reference to that variable, that's all.
> 
> Ah, that makes sense.  I was a bit puzzled by that behavior, since it 
> seemed like everything in Ruby passed by reference, but your explanation 
> helped me get it straight in my mind.
> 
> Tim Hunter wrote:
>> Check out Array#map!
> 
> That looks exactly right.  Thanks!

Note that you can do

@question, @answer_explanation =
   [@question, @answer_explanation].map {|x| f(x)}

Btw, if this happens often, you probably rather want your variables in 
an array anyway.

Cheers

	robert