[#321574] Regular Expressions — Mmcolli00 Mom <mmc_collins@...>

Hi everyone.

15 messages 2008/12/01

[#321655] Ruby cgi script — ZippySwish <fischer.jan@...>

I put "script.rb" into the cgi-bin folder of my webhost, but nothing's

12 messages 2008/12/02

[#321733] FFI 0.2.0 — "Wayne Meissner" <wmeissner@...>

Greetings Rubyists.

20 messages 2008/12/03

[#321920] Force a program to stop if runtime exceeds given duration — Aldric Giacomoni <"aldric[remove]"@...>

Any idea how to do that?

25 messages 2008/12/04
[#321924] Re: Force a program to stop if runtime exceeds given duration — "Glen Holcomb" <damnbigman@...> 2008/12/04

On Thu, Dec 4, 2008 at 10:04 AM, Aldric Giacomoni <"aldric[remove]"@

[#322011] Re: Force a program to stop if runtime exceeds given duration — Ron Fox <fox@...> 2008/12/05

See http://www.ruby-doc.org/core-1.9/classes/Process.html#M003012

[#322016] Re: Force a program to stop if runtime exceeds given duration — Aldric Giacomoni <"aldric[remove]"@...> 2008/12/05

Everybody automatically assumes that rubyists are using Linux - sadly,

[#321969] Are there any Ruby Technical Writers here? — Vito Fontaine <vito.matro@...>

I am a beginner with Ruby who was interested in writing some programs.

15 messages 2008/12/04
[#321975] Re: Are there any Ruby Technical Writers here? — Robert Klemme <shortcutter@...> 2008/12/04

On 04.12.2008 22:43, Vito Fontaine wrote:

[#321984] Re: Are there any Ruby Technical Writers here? — Vito Fontaine <vito.matro@...> 2008/12/05

Robert Klemme wrote:

[#322014] Proximity searches in Ruby — Stuart Clarke <stuart.clarke1986@...>

Does Ruby have the ability to perform proximity searches on data. For

14 messages 2008/12/05
[#322056] Re: Proximity searches in Ruby — Ilan Berci <coder68@...> 2008/12/05

No proximity searches with 1.8.. you would need a full fledged text

[#322073] shoes 2 (raisins) is go. — _why <why@...>

Salutations and hi.

13 messages 2008/12/06

[#322260] Help on algorythm — Helder Oliveira <hrpoliveira@...>

Guys i have been trying to make this algorythm but with no sucess, can

13 messages 2008/12/09
[#322261] Re: Help on algorythm — "Glen Holcomb" <damnbigman@...> 2008/12/09

On Tue, Dec 9, 2008 at 7:44 AM, Helder Oliveira <hrpoliveira@gmail.com>wrote:

[#322283] Completely new programmer lacks direction — Cameron Carroll <ubernoobs@...>

Hi. I recently picked up a beginning ruby book, having only lightly

17 messages 2008/12/09

[#322285] compare 2 text files - check for difference - Please help — Mmcolli00 Mom <mmc_collins@...>

Hi. I want to take two files that are supposed to be identical, then ook

12 messages 2008/12/09
[#322301] Re: compare 2 text files - check for difference - Please help — Brian Candler <b.candler@...> 2008/12/09

Mmcolli00 Mom wrote:

[#322306] Re: compare 2 text files - check for difference - Please help — Mmcolli00 Mom <mmc_collins@...> 2008/12/09

require 'diff/lcs/Array'

[#322417] why Hash corrupts 'key' object ? — Dmitry Perfilyev <dmitry1976@...>

Hi, I have next script:

13 messages 2008/12/10

[#322464] Q: FFI and C++? — Jeremy Henty <onepoint@...>

If I want to wrap a C++ library using FFI, can it cope with the name

14 messages 2008/12/11

[#322516] Invoking Ruby code from a low-level language? — Alex Fulton <a.fulton@...>

Hi, my sincerest apologies if this question has already been answered

11 messages 2008/12/11

[#322529] parallel method return value — Louis-Philippe <default@...>

Hi all,

17 messages 2008/12/12

[#322566] How to run background processes (more than 1 worker) parallely. — "Deepak Gole" <deepak.gole8@...>

Hi

10 messages 2008/12/12

[#322624] singleton methods vs. meta instance methods — Daniel DeLorme <dan-ml@...42.com>

If I understand the ruby object model correctly, then an object's

15 messages 2008/12/13

[#322705] ruby 1.9.1: Encoding trouble: broken US-ASCII String — Tom Link <micathom@...>

Hi,

22 messages 2008/12/14

[#322710] Help with an "easy" regular expression substitution — Iñaki Baz Castillo <ibc@...>

Hi, I'm getting crazy to get a theorically easy substitution:

16 messages 2008/12/14

[#322819] Pure Ruby Zlib::GzipWriter — Daniel Berger <djberg96@...>

Hi,

53 messages 2008/12/15
[#323877] Re: Pure Ruby Zlib::GzipWriter — Daniel Berger <djberg96@...> 2009/01/03

[#323903] Re: Pure Ruby Zlib::GzipWriter — Roger Pack <rogerpack2005@...> 2009/01/04

[#324011] Re: Pure Ruby Zlib::GzipWriter — Daniel Berger <djberg96@...> 2009/01/05

[#324442] Re: Pure Ruby Zlib::GzipWriter — Luis Lavena <luislavena@...> 2009/01/10

On Jan 9, 9:26=A0pm, "Charles L." <aquas...@gmail.com> wrote:

[#322987] Using ruby hash on array — Stuart Clarke <stuart.clarke1986@...>

I would like to process some data from an array and using hash to

14 messages 2008/12/17

[#323085] Ruby and Rails supported on 10gen — "Jim Menard" <jim.menard@...>

http://www.10gen.com/blog/2008/12/ruby-support-on-10gen

11 messages 2008/12/18

[#323166] Dreaming of a Ruby Christmas (#187) — Matthew Moss <matt@...>

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

11 messages 2008/12/19

[#323204] get first and last line from txt file - how? — Mmcolli00 Mom <mmc_collins@...>

I have txt file with date/time stamps only. I want to grab the first

19 messages 2008/12/20
[#323205] Re: get first and last line from txt file - how? — Tim Hunter <TimHunter@...> 2008/12/20

Mmcolli00 Mom wrote:

[#323207] Re: get first and last line from txt file - how? — "Yaser Sulaiman" <yaserbuntu@...> 2008/12/20

I'm just wondering..

[#323273] how to make installing Ruby easier for amateurs — Tom Cloyd <tomcloyd@...>

Greetings!

21 messages 2008/12/22

[#323312] Name that data structure! — Simon Chiang <simon.a.chiang@...>

I'm using a data structure that I'm sure has been implemented and

18 messages 2008/12/22
[#323314] Re: Name that data structure! — "Gregory Brown" <gregory.t.brown@...> 2008/12/22

On Mon, Dec 22, 2008 at 5:38 PM, Simon Chiang <simon.a.chiang@gmail.com> wrote:

[#323342] Are all Ruby built-in objects thread safe? — "Just Another Victim of the Ambient Morality" <ihatespam@...>

Are all built-in objects thread safe? For example, if I have an array

23 messages 2008/12/23
[#323346] Re: Are all Ruby built-in objects thread safe? — Yukihiro Matsumoto <matz@...> 2008/12/23

Hi,

[#323519] What does 'Monkey Patching' exactly Mean in Ruby? — "Yaser Sulaiman" <yaserbuntu@...>

According to Wikipedia, a monkey patch[1] is:

36 messages 2008/12/27
[#323813] Re: What does 'Monkey Patching' exactly Mean in Ruby? — Jg W Mittag <JoergWMittag+Usenet@...> 2009/01/02

Phlip wrote:

[#323832] Re: What does 'Monkey Patching' exactly Mean in Ruby? — "David A. Black" <dblack@...> 2009/01/02

Hi --

[#323644] Why Ruby? — Mike Stephens <rubfor@...>

I have never seen or heard of Ruby in a corporate context. The single

35 messages 2008/12/30

[#323668] Ruby 1.9.1 RC1 is released — "Yugui (Yuki Sonoda)" <yugui@...>

Hi, folks

21 messages 2008/12/30

Re: Are all Ruby built-in objects thread safe?

From: "Just Another Victim of the Ambient Morality" <ihatespam@...>
Date: 2008-12-24 06:56:21 UTC
List: ruby-talk #323401
"Jg W Mittag" <JoergWMittag+Usenet@GoogleMail.Com> wrote in message 
news:a4cg2zmfjkh9$.dlg@jwmittag.my-fqdn.de...
> Just Another Victim of the Ambient Morality wrote:
>>     Are all built-in objects thread safe?  For example, if I have an 
>> array
>> and one thread is constant appending to it while another thread is 
>> shifting
>> elements off of it and there's no synchronization going on, can the array
>> object ever get corrupted?  What about a similar scenario for hashes? 
>> These
>> are surely complicated objects with internal state that must be 
>> maintained.
>> Are they implemented to be thread safe?
>
> This is a *very* interesting question! And it is a question that can
> ultimately *only* be answered by a formal Ruby Specification or more
> specifically a formal Ruby Memory Model.
>
> Until we have such a specification, the C source code of MRI or YARV
> is considered to be the "specfication". However, there is a problem:
> that source code can actually be interpreted several different ways.
>
> If you look at the implementations of Hash, Array and friends, you
> will see that they are not thread-safe. Ergo: the specification says
> that the user is responsible for locking Arrays and Hashes.
>
> If, however, you look at the implementation of threads, you will see
> that both MRI and YARV are actually incapable of running more than one
> thread at a time -- even on a 1000-core machine MRI and YARV will only
> ever use one core. So, since two threads can never access an Array at
> the same time, there is no need for locking. Ergo: the specification
> says that the user is *not* responsible for locking Arrays and Hashes.

    I don't think this is relevant.  Concurrency isn't about how many 
processors you use.  Multitasking systems existed long before SMP hardware 
existed.  Concurrency is about doing tasks concurrently.  If you have one 
method running and it may be preempted by another method then they are 
running concurrently.  If the two methods share data then they may corrupt 
that data for each other.  This is true regardless of how these 
concurrencies, or threads, are implemented.  It doesn't matter if they're 
hardware supported system threads or if they're Ruby green threads...


> So, in short: when in doubt, lock.

    This is the popular wisdom so this is what I will do.  Better safe than 
not thread-safe!




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