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List:       ruby-talk
Subject:    Re: Ruby breakpoint has weird idea of what local_variables are?
From:       Robert Klemme <shortcutter () googlemail ! com>
Date:       2010-05-31 19:16:12
Message-ID: AANLkTikdUWBFua68ER95A8sOWvuy3QOR5Rrdr5_gz_uj () mail ! gmail ! com
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2010/5/31 RichardOnRails <RichardDummyMailbox58407@uscomputergurus.com>:
> Hi,
>
> I've got a 7-liner:
> require 'rubygems'
> require 'breakpoint'
>
> a = 'aaa'
> b = 'bbb'
> breakpoint
> c = 'ccc'
>
> In a Command window, I've got:
> K:\_Projects\Ruby\_Ruby_Tests\TestBreakpoint>ruby TestBreakpoint.rb
> Executing break point at TestBreakpoint.rb:9
> irb(main):001:0> local_variables
> => ["id", "block", "_"]
> irb(main):002:0> quit
>
> This test is based on Recipe 17.10 of the Ruby Cookbook, O'Reilly,
> 2006
>
> Why doesn't the array allegedly presenting local variables:
> 1. Include a, b & c?
> 2. Present the things it does; what do they signify?
>
> I'm running Ruby 1.8.6 over WinXP-Pro/SP3

No idea.  However, the "regular" debugger does not have that issue:

Robert@babelfish ~
$ ruby19 -r debug x.rb
Debug.rb
Emacs support available.

x.rb:1:a = 'aaa'
(rdb:1) l
[-4, 5] in x.rb
=> 1  a = 'aaa'
   2  b = 'bbb'
   3  # breakpoint
   4  c = 'ccc'
(rdb:1) b 4
Set breakpoint 1 at x.rb:4
(rdb:1) v l
  a => nil
  b => nil
  c => nil
(rdb:1) c
Breakpoint 1, toplevel at x.rb:4
x.rb:4:c = 'ccc'
(rdb:1) v l
  a => "aaa"
  b => "bbb"
  c => nil
(rdb:1) n

Robert@babelfish ~
$

Note: "v l" lists local variables.

Kind regards

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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