[#397988] Help with sqlite3 please — Kaye Ng <lists@...>

I'm on Windows 7 Ultimate, 64-bit

18 messages 2012/08/03
[#397989] Re: Help with sqlite3 please — Chris Hulan <chris.hulan@...> 2012/08/03

sqlite is not ruby, so you should look for a sqlite group ;)

[#397990] Re: Help with sqlite3 please — Kaye Ng <lists@...> 2012/08/03

> However it looks like you have 'SQL' at the beginning of your CREATE

[#398031] Gem install or usage problem in shared environment — Tom Moulton <lists@...>

I am moving to a Westhost shared CPanel account and I am trying to set

17 messages 2012/08/04
[#398077] Re: Gem install or usage problem in shared environment — Tom Moulton <lists@...> 2012/08/06

I got a solution from WestHost and it may help others:

[#398086] Re: Gem install or usage problem in shared environment — Ryan Davis <ryand-ruby@...> 2012/08/07

[#398088] Re: Gem install or usage problem in shared environment — Tom Moulton <lists@...> 2012/08/07

Ryan Davis wrote in post #1071503:

[#398043] Redefining constants for a given instance only — "Andrea Dallera" <andrea@...>

Hello,=0A=0A=C2=A0 =C2=A0 let's say we have two empty classes:=0A=0Aclass=

9 messages 2012/08/05

[#398063] Join with ActiveRecord using non-standard schema — Tedi Roca <lists@...>

Hi,

13 messages 2012/08/06

[#398135] Help with database-related code pls — Kaye Ng <lists@...>

Hi guys! This is just a part of the code of a program that can load a

12 messages 2012/08/08

[#398190] How do you order your class methods? — masta Blasta <lists@...>

Just getting some layout ideas from other fellow devs.

11 messages 2012/08/10

[#398245] namespace instance methods? — John Doe <lists@...>

I have a large class with many instance methods that I want to

14 messages 2012/08/13

[#398287] Idea: def ... end returns the symbolized version of the newly-defined method, instead of nil — Peter <lumbergh@...>

This would allow useful syntax constructs such as this:

9 messages 2012/08/13

[#398362] case vs if-else — ajay paswan <lists@...>

Which one is faster?

20 messages 2012/08/16

[#398385] A Ruby class is never closed — Rubyist Rohit <lists@...>

Is it true that a Ruby class definition is never closed? Even after

18 messages 2012/08/16

[#398504] How to create an EXecutable file (Linux) — Fosiul Alam <lists@...>

Hi

13 messages 2012/08/22

[#398506] Save a file by clicking on a link — ajay paswan <lists@...>

I clicked a link to download a file using ruby, now I see the open-save

41 messages 2012/08/22

[#398641] force child threads run paralelly? — ajay paswan <lists@...>

I have created two child thread using main thread- child1 and child2.

19 messages 2012/08/28
[#398644] Re: force child threads run paralelly? — ajay paswan <lists@...> 2012/08/28

Ruby version:

[#398648] Re: force child threads run paralelly? — Tony Arcieri <tony.arcieri@...> 2012/08/28

On Tue, Aug 28, 2012 at 7:19 AM, ajay paswan <lists@ruby-forum.com> wrote:

[#398684] Can I do this with Ruby and sqlite alone? — Kaye Ng <lists@...>

Hi guys.

16 messages 2012/08/29

Re: Is calling system() from a thread suppose to be safe?

From: Tanaka Akira <akr@...>
Date: 2012-08-29 08:30:46 UTC
List: ruby-talk #398687
2012/8/25 Ra=FAl Guti=E9rrez Segal=E9s <rgs@rieder.net.py>:

> Sure, here is the full-script:
>
> http://www.itevenworks.net/~rgs/ruby/wifi-state-observer
>
> system() happens inside vpn_down(). As you can see the main thread is
> glib2 loop and the other forks/execs a binary (that connects to a
> vpn).

It seems Process.waitall takes the child process spawned by system().

In my environment, the problem can be reproducible as follows,
sometimes (not always):

  % ruby -ve '
  Thread.new { loop { p Process.waitall } }
  loop { p system("true") }
  '
  ruby 2.0.0dev (2012-08-15 trunk 36702) [x86_64-linux]
  -e:3: warning: instance variable status not initialized
  -e:3:in `system': no implicit conversion from nil to integer (TypeError)
	  from -e:3:in `block in <main>'
	  from -e:3:in `loop'
	  from -e:3:in `<main>'

How about avoiding Process.waitall?

I feel the error message can be improved, though.
--=20
Tanaka Akira

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