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• STL algorithms and concurrent programming

  - by Andrew

  Hello everyone, Can any of STL algorithms/container operations like std::fill, std::transform be executed in parallel if I enable OpenMP for my compiler? I am working with MSVC 2008 at the moment. Or maybe there are other ways to make it concurrent? Thanks.

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• How can I implement MapReduce using shell commands?

  - by alex

  How do you execute a Unix shell command (e.g awk one liner) on a cluster in parallel (step 1) and collect the results back to a central node (step 2)? Update: I've just found http://blog.last.fm/2009/04/06/mapreduce-bash-script It seems to do exactly what I need.

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• Number of threads and thread numbers in Grand Central Dispatch

  - by raphgott

  I am using C and Grand Central Dispatch to parallelize some heavy computations. How can I get the number of threads used by GCD? Also is it possible to know on which thread a piece of code is currently running on? Basically I'd like to use sprng (parallel random numbers) with multiple streams and for that I need to know what stream id to use (and…

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• xcopy directories and subdirectories recursively and filter only filenames by extension

  - by DxCK

  Here is what i have for now: xcopy "c:\projects\SampleProject" "c:\temp\copytest" /E /H /EXCLUDE:elist.txt It does all the job i need except filtering filenames by extensions. For example: copy all *.exe files from c:\temp\copytest and subdirectories. How to do that?

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• How to re-render a page from a Google Chrome extension?

  - by Dexter

  I'm new to writing extensions for Google Chrome. I want to make an extension that only runs on a few pages (that I'll choose) and re-renders their CSS after the page has loaded (ideally I would like something similar to what you can do with GM_addStyle in greasemonkey scripts). How can I accomplish this in a Chrome extension?

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• firefox extension help

  - by Thomas

  Hi all, I am developing a firefox extension which needs to add some html on the page it runs. This element I will be writing needs to be decorated with css and also load some images. I have both the css file and the images in the plugin, but I do not know how to reference them. Do I need to insert the css file to the page I want to modify? …

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• What's the best way to mix Ruby and other languages? (Especially C++)

  - by Andy

  Hi, I'm learning Ruby, and I'm starting to play with building extensions in C. I have Programming Ruby The Pragmatic Programmers' Guide and so I can follow that for the basic nuts and bolts. What I was wondering is if there already existed some nifty frameworks/whatever to help interoperability between Ruby and other languages, with C++ being…

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• The simplest concurrency pattern

  - by Ilya Kogan

  Please, would you help me in reminding me of one of the simplest parallel programming techniques. How do I do the following in C#: Initial state: semaphore counter = 0 Thread 1: // Block until semaphore is signalled semaphore.Wait(); // wait until semaphore counter is 1 Thread 2: // Allow thread 1 to run: semaphore.Signal(); //…

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• Can .NET Task instances go out of scope during run?

  - by Henry Jackson

  If I have the following block of code in a method (using .NET 4 and the Task Parallel Library): var task = new Task(() => DoSomethingLongRunning()); task.Start(); and the method returns, will that task go out of scope and be garbage collected, or will it run to completion? I haven't noticed any issues with GCing, but want to make…

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• openmp program elapsed time not scaling with increased threads

  - by Griff

  I've got this openmp fortran program doing an embarrassingly parallel problem - do loop over 512^3 elements. See output below. Why would there be such strange behavior in the elapsed time as a function of threads? I thought it would peak at a sweet spot then slowly degrade. This clearly isn't happening. Perhaps I misunderstand something…

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• Will First() perform the OrderBy()?

  - by Martin

  Is there any difference in (asymptotic) performance between Orders.OrderBy(order => order.Date).First() and Orders.Where(order => order.Date == Orders.Max(x => x.Date)); i.e. will First() perform the OrderBy()? I'm guessing no. MSDN says enumerating the collection via foreach och GetEnumerator does but the phrasing does…

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• openmp sections running sequentially

  - by chi42

  I have the following code: #pragma omp parallel sections private(x,y,cpsrcptr) firstprivate(srcptr) lastprivate(srcptr) { #pragma omp section { //stuff } #pragma omp section { //stuff } } According to the Zoom profiler, two threads are created, one thread executes both the sections, and the…

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• How to compile different extension files as C++ in Visual Studio C++ 2010?

  - by user254101

  In my Visual Studio 2010 project I have files with .mm file extension, that need to be compiled as normal C++ files. Is there a way to make a build rule for new extensions or something like that? In VS 2008 there were options for that, but they are gone in 2010.

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• Reading info from printer on USB port

  - by Hein du Plessis

  In the days of parallel printers one used to be able to send a command on LPT1 and receive back standard info such as life count etc. Now, with USB devices, have we lost that capability? Or is there still a way to read the info?

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• ParallelWork: Feature rich multithreaded fluent task execution library for WPF

  - by oazabir

  ParallelWork is an open source free helper class that lets you run multiple work in parallel threads, get success, failure and progress update on the WPF UI thread, wait for work to complete, abort all work (in case of shutdown), queue work to run after certain time, chain parallel work one after another. It’s more convenient than…

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• Force an ASP.NET 3.5 WebSite to use version 1.0.61025.0 of System.Web.Extensions

  - by Greg

  I just upgraded my Web Site project from 2.0 to 3.5 to take advantage of the TimeZoneInfo class. When I did this, I started getting an ambiguous assembly error (*see below). The problem is, I'm not using ScriptManager, an old version of SyncFusion is. I can't upgrade SyncFusion right now, so I need to tell ASP.NET to use version…

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• What is your opinion of the Telerik Extensions for MVC?

  - by Chad

  I've started digging around with using the Telerik Extensions for MVC. They don't integrate seemlessly into my current project, but I could reorganize things to fit it in. But, I'm wondering if it would be worth it in the end. I've been searching for reviews on the extensions, I haven't seen too many. So I'm asking here. On…

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• SQL SERVER – #TechEdIn – Presenting Tomorrow on Speed Up! – Parallel Processes and Unparalleled Performance at TechEd India 2012

  - by pinaldave

  Performance tuning is always a very hot topic when it is about SQL Server. SQL Server Performance Tuning is a very challenging subject that requires expertise in Database Administration and Database Development. I always have enjoyed talking about SQL Server Performance tuning subject. However, in India, it’s actually the…

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• php extension COM_DOTNET.dll

  - by aXul

  I'm trying to add a PHP extension (PHP_COM_DOTNET)to my server, by writing the following in my php.ini [COM_DOT_NET] extension=php_com_dotnet.dll I downloaded the dll file and put it in my ext folder, but when restarting the server, I got the following errors cant find entry point zend_new_interned_string in…

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• Firefox 3.6 Kiosk mode

  - by David Murdoch

  I've developed a FF 3.6+ only web app that needs to run in kiosk mode. I has assumed that since nearly every other browser has a built in kiosk switch FF would have this too. I haven't been able to find this. http://kb.mozillazine.org/Command_line_arguments does not have a kiosk mode listed. R-Kiosk doesn't…

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• Firefox Using Prism Website Icon instead of Firefox Icon in Taskbar

  - by Yaakov Ellis

  A while back, I created a website shortcut using the now discontinued Prism extension for Firefox. This worked fine at the time. However, now that Prism has been discontinued, whenever I open Firefox, when the shortcut for FF shows up my Windows taskbar, it does so with the website favico for the old Prism…

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• Uninstalling an Incompatible Addon in Firefox ?

  - by Mohammad

  There are two incompatible addons in my addons list that Uninstall button is disabled for them. They were working well on FF3.5 , but upon I installed FF3.6 they were incompatible. The first one is PC Sync 2 Synchronisation Extension The second one is Firefox Synchronisation Extension How can I…

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• API numbers don't match on compiled PHP extension

  - by tixrus

  I'm trying to get GD into my PHP. I recently installed PHP5.3.0 on my system running Mac Leopard using mac ports. It did not come with the gd module. So I downloaded gd, compiled it as an extension module as per http://www.kenior.ch/macintosh/adding-gd-library-for-mac-os-x-leopard, made php.ini…

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• Local Flash in Chrome pepper player won't link to internet

  - by No one in particluar

  I have a local .swf file in a local .html file. The flash file opens a popup window when a link is clicked. In Chrome, when I open the html file and click the button, nothing happens. Then when I go to about:plugins and disable the top Flash player (the pepper one) then try refresh and try…

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• Unable to install Wordpress on Amazon's EC2 instance due to missing php-mbstring

  - by alexus

  I've created a new instance on Amazon's EC2 and I'm trying in wordpress and it's failing due to php-mbstring: # yum install wordpress Loaded plugins: amazon-id, rhui-lb Resolving Dependencies --> Running transaction check ---> Package wordpress.noarch 0:3.9.1-1.el7 will be installed…

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