From: dblack@...
Date: 2006-02-28T23:14:26+09:00
Subject: Re: Same variable name used in block and local question

Hi --

On Tue, 28 Feb 2006, Robert Klemme wrote:

> rubyrus wrote:
>> Can anybody help me here, TIA!!
>>
>> This is the code.  I expect to see the string "Afterward:turkey", but
>> why am I getting "Afterward:camel"?  |animal| parameter in a block
>> should be temporary inside the block, right??
>
> No, it isn't because it was defined outside the block.  It's used in cases
> like
>
> count = 0
> arr.each { count += 1 }
> puts "count=#{count}"
>
> If you want to keep it local you must not define it in the surrounding
> scope.

I think that's a different thing, though, from the parameter
semantics.  As I understand it, in 2.0 things would work like this:

   count = 0
   other = "zero"
   [1,2,3].each {|other| count += 1 }

   # count is now 3
   # other is still "zero"

I may be getting it wrong... but I think the scoping of parameter
variables and other block variables is going to diverge.


David

-- 
David A. Black (dblack@wobblini.net)
Ruby Power and Light (http://www.rubypowerandlight.com)

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