[#358392] Increase significant digits in Float — Jason Lillywhite <jason.lillywhite@...>

If I want to increase my significant digits beyond 15 in a result of a

12 messages 2010/03/02

[#358431] A gem for handling temporary file(s)? — Albert Schlef <albertschlef@...>

I'm writing a program that needs to generate two or three temporary

21 messages 2010/03/03
[#358432] Re: A gem for handling temporary file(s)? — Paul Harrington <xenogenesis@...> 2010/03/03

Albert Schlef wrote:

[#358443] Re: A gem for handling temporary file(s)? — Albert Schlef <albertschlef@...> 2010/03/03

Paul Harrington wrote:

[#358486] Re: A gem for handling temporary file(s)? — Caleb Clausen <vikkous@...> 2010/03/03

On 3/2/10, Albert Schlef <albertschlef@gmail.com> wrote:

[#358485] Test::Unit::Omission - Unable to omit tests — Champak Ch <champaka@...>

I am trying to omit some tests while using the test unit framework. My

12 messages 2010/03/03

[#358551] Shared hosting recommendation? — Rafael Vega <email.rafa@...>

Hello!

10 messages 2010/03/04

[#358559] Limit number of concurrent running threads in pool — Joe Martin <jm202@...>

Hi

14 messages 2010/03/04

[#358576] A good portable text editor/IDE for Ruby? — Reiichi Tyrael <xxreiichixx@...>

I am searching for a good portable text editor or IDE for Ruby to use on

19 messages 2010/03/05

[#358586] Base-64 encoding--Just for the fun of it! — "Aaron D. Gifford" <astounding@...>

Yes, there's always:

10 messages 2010/03/05

[#358611] On what of these books is better to start to study Ruby? — Vlad Gerasimov <refermaker@...>

I have 3 books:

12 messages 2010/03/05

[#358634] Conditional keys in hash - out of the box? — "Sven S." <svoop@...>

Hi

12 messages 2010/03/05

[#358661] Why no TextMate for Linux? — thunk <gmkoller@...>

I spent some happy development time in "VisualAge" for Smalltalk +

42 messages 2010/03/06

[#358702] win32console 1.3.0.beta2 Released — Luis Lavena <luislavena@...>

win32console version 1.3.0.beta2 has been released!

17 messages 2010/03/07

[#358757] Shortest code — Prasanth Ravi <dare.take@...>

hi i'm a newbie in ruby and was test out some interesting problems in

18 messages 2010/03/08

[#358885] reading an UTF-8 encoded file — unbewusst.sein@... (Une B騅ue)

13 messages 2010/03/10

[#359008] Dir.glob problem — David Vlad <cluny_gisslaren@...>

In the program Im making I need to read some wma files into a variable

21 messages 2010/03/12

[#359031] Newbie Help : Object — Jerome David Sallinger <imran.nazir@...>

Hello,

14 messages 2010/03/13

[#359090] Overriding new? — Andrea Dallera <andrea@...>

Hi everybody,

19 messages 2010/03/15
[#359091] Re: Overriding new? — Chuck Remes <cremes.devlist@...> 2010/03/15

[#359093] Re: Overriding new? — Andrea Dallera <andrea@...> 2010/03/15

Hei Chuck,

[#359130] Recommended way to install Rubygems — Leslie Viljoen <leslieviljoen@...>

Hi!

64 messages 2010/03/16
[#359175] Re: Recommended way to install Rubygems — Eric Hodel <drbrain@...7.net> 2010/03/17

On Mar 16, 2010, at 03:22, Leslie Viljoen wrote:

[#359176] Re: Recommended way to install Rubygems — Lucas Nussbaum <lucas@...> 2010/03/17

(Please Cc me when replying, I don't follow ruby-talk@ closely enough to

[#359183] Re: Recommended way to install Rubygems — Nick Brown <nick@...> 2010/03/18

Lucas: Thanks for maintaining the Ruby package in Ubuntu!

[#359187] Re: Recommended way to install Rubygems — Lucas Nussbaum <lucas@...> 2010/03/18

On 18/03/10 at 13:36 +0900, Nick Brown wrote:

[#359200] Re: Recommended way to install Rubygems — Nick Brown <nick@...> 2010/03/18

Lucas Nussbaum wrote:

[#359204] Re: Recommended way to install Rubygems — Lucas Nussbaum <lucas@...> 2010/03/18

On 18/03/10 at 23:05 +0900, Nick Brown wrote:

[#359210] Re: Recommended way to install Rubygems — Rick DeNatale <rick.denatale@...> 2010/03/18

On Thu, Mar 18, 2010 at 10:21 AM, Lucas Nussbaum

[#359215] Re: Recommended way to install Rubygems — Lucas Nussbaum <lucas@...> 2010/03/18

On 18/03/10 at 23:45 +0900, Rick DeNatale wrote:

[#359230] Re: Recommended way to install Rubygems — Aldric Giacomoni <aldric@...> 2010/03/18

Lucas Nussbaum wrote:

[#359233] Re: Recommended way to install Rubygems — Lucas Nussbaum <lucas@...> 2010/03/18

On 19/03/10 at 02:49 +0900, Aldric Giacomoni wrote:

[#359171] Replace Text at Specific Positions Across Files — Shiny Hydra <slotriof@...>

Hello everyone,

12 messages 2010/03/17
[#359192] Re: Replace Text at Specific Positions Across Files — Robert Klemme <shortcutter@...> 2010/03/18

2010/3/17 Shiny Hydra <slotriof@guerrillamailblock.com>:

[#359198] Re: Replace Text at Specific Positions Across Files — Shiny Hydra <slotriof@...> 2010/03/18

> So your file has fixed width records? This is important to know,

[#359255] Grouping elements of an array — Steve Wilhelm <steve@...831.com>

I have an array of records that contain timestamps at random intervals.

24 messages 2010/03/18

[#359354] Living with a Swarm of Boids - A report from the front — thunk <gmkoller@...>

Hi,

15 messages 2010/03/20

[#359388] A plugin system using extend — Jean-denis Vauguet <jd@...>

Hi.

17 messages 2010/03/21
[#359394] Re: A plugin system using extend — Josh Cheek <josh.cheek@...> 2010/03/21

On Sat, Mar 20, 2010 at 9:46 PM, Jean-denis Vauguet <jd@vauguet.fr> wrote:

[#359398] Re: A plugin system using extend — Jean-denis Vauguet <jd@...> 2010/03/21

Thank you Josh. Actually I've already tested what you wrote and that's

[#359402] Re: A plugin system using extend — Jean-denis Vauguet <jd@...> 2010/03/21

Another idea I had is the following:

[#359410] Re: A plugin system using extend — James Edward Gray II <james@...> 2010/03/21

On Mar 21, 2010, at 2:13 AM, Jean-denis Vauguet wrote:

[#359420] Reading contents of all files from a Directory — Hawksury Gear <blackhawk_932@...>

Hello,

23 messages 2010/03/21
[#359422] Re: Reading contents of all files from a Directory — Jonathan Nielsen <jonathan@...> 2010/03/21

> I am trying to "Read Content" of all the files from a Directory. So far

[#359423] Re: Reading contents of all files from a Directory — Jonathan Nielsen <jonathan@...> 2010/03/21

> arr =3D Dir.open("K:/test").entries

[#359464] Re: Reading contents of all files from a Directory — Robert Klemme <shortcutter@...> 2010/03/22

2010/3/21 Jonathan Nielsen <jonathan@jmnet.us>:

[#360368] Re: Reading contents of all files from a Directory — Hawksury Gear <blackhawk_932@...> 2010/04/04

> If it is only for output purposes, we can actually do it in one line:

[#360370] Re: Reading contents of all files from a Directory — Jes俍 Gabriel y Gal疣 <jgabrielygalan@...> 2010/04/04

On Sun, Apr 4, 2010 at 3:06 PM, Hawksury Gear <blackhawk_932@hotmail.com> w=

[#360373] Re: Reading contents of all files from a Directory — Hawksury Gear <blackhawk_932@...> 2010/04/04

Thanks for replying ,when I am doing

[#360374] Re: Reading contents of all files from a Directory — Hassan Schroeder <hassan.schroeder@...> 2010/04/04

On Sun, Apr 4, 2010 at 8:16 AM, Hawksury Gear <blackhawk_932@hotmail.com> wrote:

[#360375] Re: Reading contents of all files from a Directory — Hawksury Gear <blackhawk_932@...> 2010/04/04

Hassan Schroeder wrote:

[#359662] index of string from beginning of line vs beginning of file — "Jesse B." <jessebos@...>

I am trying to write a basic script to implement "silent comments"

10 messages 2010/03/25
[#359663] Re: index of string from beginning of line vs beginning of file — Jes俍 Gabriel y Gal疣 <jgabrielygalan@...> 2010/03/25

On Thu, Mar 25, 2010 at 5:19 PM, Jesse B. <jessebos@aol.com> wrote:

[#359684] Ruby Summer of Code 2010 — Jeremy Kemper <jeremy@...>

Fellow Rubyists, I'm proud to announce the first annual Ruby Summer of Code.

20 messages 2010/03/26
[#359985] Re: [ANN] Ruby Summer of Code 2010 — Roger Pack <rogerpack2005@...> 2010/03/30

Jeremy Kemper wrote:

[#359697] Ruby and user documentation — Michel Demazure <michel@...>

Hi all,

20 messages 2010/03/26

[#359749] Boid writeup idea — thunk <gmkoller@...>

30 messages 2010/03/26

[#359909] return number of spaces at the beginning of a line — "Jesse B." <jessebos@...>

How would I find the number of spaces at the beginning of a line before

28 messages 2010/03/30
[#359925] Re: return number of spaces at the beginning of a line — Josh Cheek <josh.cheek@...> 2010/03/30

On Mon, Mar 29, 2010 at 8:41 PM, Jesse B. <jessebos@aol.com> wrote:

[#359941] Re: return number of spaces at the beginning of a line — Robert Klemme <shortcutter@...> 2010/03/30

2010/3/30 Josh Cheek <josh.cheek@gmail.com>:

[#359945] Re: return number of spaces at the beginning of a line — "Jesse B." <jessebos@...> 2010/03/30

This second post with the "spaces only" fix seems to meet all the needs

[#359961] Re: return number of spaces at the beginning of a line — Robert Klemme <shortcutter@...> 2010/03/30

2010/3/30 Jesse B. <jessebos@aol.com>:

[#360011] RubyDictionary - First Try — Max Schmidt <max.schmidt.privat@...>

Hello folks,

12 messages 2010/03/30
[#360035] Re: RubyDictionary - First Try — Jes俍 Gabriel y Gal疣 <jgabrielygalan@...> 2010/03/31

On Wed, Mar 31, 2010 at 12:40 AM, Max Schmidt

[#360033] Playing Games with "Ruids" — thunk <gmkoller@...>

46 messages 2010/03/31

Re: asynchronous network access with Rack?

From: Richard Conroy <richard.conroy@...>
Date: 2010-03-09 00:02:33 UTC
List: ruby-talk #358765
On Mon, Mar 8, 2010 at 10:50 PM, Nick Brown <nick@nick-brown.com> wrote:

> I've read that "threading is considered harmful" for Ruby web apps.
> Well, I'm writing a Sinatra app which will build a page based on the
> responses of several servers (Net::HTTP.get). I want to do these .gets
> in parallel, as doing them synchronously would obviously mean the users
> would wait for a long time.
>

There are some historical reasons behind threading == harmful (defaults for
Rails,
GIL & native gems, and a general lack of robustness in older Ruby thread
implementations).



> Would it be "considered harmful" to do:
>
>  resp_a, resp_b, resp_c = nil
>  thread_a = Thread.new { resp_a = Net::HTTP.get site_a }
>  thread_b = Thread.new { resp_b = Net::HTTP.get site_b }
>  thread_c = Thread.new { resp_c = Net::HTTP.get site_c }
>  thread_a.join
>  thread_b.join
>  thread_c.join
>
> Is there any possible harm that could come from this? Can threading
> interfere with Rack in some way? I haven't done much previous
> development of threaded apps, so I would appreciate any tips.
>

I believe Sinatra/Rack is thread safe, so you should be fine on that count.

Whats more important is that this model isn't exactly a good architecture.
You are spawning a lot of threads per request and you have no real external
oversight into how they are working. You can't send back your response
until you have received all your outbound responses and you are particularly
vulnerable to timeouts - in particular the client browser can timeout
your request, while you are still waiting on responses to outbound
connections.

You see a lot of solutions that use process level concurrency (BackgroundRb,
DelayedJob etc) but most web solutions that aggregate content from multiple
sites (i.e. mashups) do it all in the browser, with some cross site
scripting
& javascript.

Technically I dont see too many issues with the multi-threaded approach you
propose for smaller requests, but you will want to set an aggressive
timeout
on the outbound requests.
-- 
http://richardconroy.blogspot.com

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