Kernel.local_variables question

ruby-talk
1

Consider

def foo
  a = "a"
  b = 1
  p Kernel.local_variables
end

Why doesn't this print anything? I would expect it to print

    ["a", "b"]

but instead it prints nothing.

···

--
Jos Backus _/ _/_/_/ Sunnyvale, CA
                                _/ _/ _/
                               _/ _/_/_/
                          _/ _/ _/ _/
jos at catnook.com _/_/ _/_/_/ require 'std/disclaimer'

2

Jos Backus wrote:

Consider

def foo
  a = "a"
  b = 1
  p Kernel.local_variables
end

Why doesn't this print anything? I would expect it to print

    ["a", "b"]

but instead it prints nothing.

Which version of ruby and which platform?
It works for me:

···

------------------------------------------
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\>irb -v
irb 0.9(02/07/03)

C:\>irb
irb(main):001:0> def foo; a = "a"; b = 1; p Kernel.local_variables; end
=> nil
irb(main):002:0> foo
["a", "b"]
=> nil
irb(main):003:0> exit

C:\>ruby -v
ruby 1.8.2 (2004-06-29) [i386-mswin32]

C:\>

3

This is with the current ruby from the FreeBSD ports system:

ruby 1.8.2 (2004-07-29) [i386-freebsd6]

It doesn't work with today's HEAD either (just tried it), which is

ruby 1.9.0 (2004-12-16) [i386-freebsd6.0]

I figured with this working it would be possible to fake Python's `vars()',
useful for quick conversions of Python code.

···

On Thu, Dec 16, 2004 at 01:22:13PM +0900, Shashank Date wrote:

It works for me:
------------------------------------------
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\>irb -v
irb 0.9(02/07/03)

C:\>irb
irb(main):001:0> def foo; a = "a"; b = 1; p Kernel.local_variables; end
=> nil
irb(main):002:0> foo
["a", "b"]
=> nil
irb(main):003:0> exit

C:\>ruby -v
ruby 1.8.2 (2004-06-29) [i386-mswin32]

C:\>

--
Jos Backus _/ _/_/_/ Sunnyvale, CA
                                _/ _/ _/
                               _/ _/_/_/
                          _/ _/ _/ _/
jos at catnook.com _/_/ _/_/_/ require 'std/disclaimer'

4

Hi,

At Thu, 16 Dec 2004 13:43:15 +0900,
Jos Backus wrote in [ruby-talk:123764]:

This is with the current ruby from the FreeBSD ports system:

ruby 1.8.2 (2004-07-29) [i386-freebsd6]

It doesn't work with today's HEAD either (just tried it), which is

ruby 1.9.0 (2004-12-16) [i386-freebsd6.0]

It works for me.

  $ ./ruby -v -e '
  def foo
    a = "a"
    b = 1
    p Kernel.local_variables
  end
  foo
  '
  ruby 1.9.0 (2004-12-16) [i686-linux]
  ["a", "b"]

···

--
Nobu Nakada

5

Nevermind, it would help if I called foo, which I wasn't. Duh.

My apologies, especially to Shashank and Nobu, for the noise. Been busy
porting a Python script to Ruby all day. Bad excuse, I know.

···

--
Jos Backus _/ _/_/_/ Sunnyvale, CA
                                _/ _/ _/
                               _/ _/_/_/
                          _/ _/ _/ _/
jos at catnook.com _/_/ _/_/_/ require 'std/disclaimer'