From: Robert Klemme <shortcutter@...>
Date: 2008-10-28T22:32:29+09:00
Subject: Re: Quick Scope Question

2008/10/27 David A. Black <dblack@rubypal.com>:
> Hi --
>
> On Tue, 28 Oct 2008, Daniel Malcolm Webb [dbw] wrote:
>
>> Q_txt = res_q[0][1]
>>  (0..10).each do |qt|
>>   question_text = q_txt.scan(/\w+/)[qt]
>>  end
>>
>> when I access question_text after, obviously it's out of scope what am I
>> missing here?

Not what you asked for, but: "Q_txt" != "q_txt".  Also, you should do
the scan only once - this is more efficient:

texts = res_q[0][1].scan(/\w+/)
texts.each_with_index do |question_text, qt|
   ...
end

> Blocks have a kind of one-way valve local scope. Variables that
> already exist before the block will exist in the block. Variables that
> are created in the block do not survive past the block.

Which is basically the same in many modern programming languages,
isn't it?  Of course, there are some subtleties (e.g. whether
shadowing of more local definitions is allowed etc.).

Kind regards

robert

-- 
remember.guy do |as, often| as.you_can - without end