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• Open source C program with little requirements and at least 2MB binary size.

  - by max

  Hi, I'm developing a operating system and I need a test program (function of any kind) to test certain internal features. I cannot find any appropriate program to do this job. Probably one of you knows one. The program should be open source, written in C with very little user library usage (only file IO, pthreads, stdio, stdlib preferred) and must have a binary size of at least 2MB. Thanks for any suggestions.

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• Hidden limitations of Google App Engine?

  - by Kyle Cronin

  I've been looking into writing a web app that will run on Google App Engine, but before I commit myself to the platform I'd like to know what, if any, limitations there are. I'm aware of the basic CPU/bandwidth restrictions that Google places on the free service, but I'm wondering more about development restrictions like how BigTable compares to a standard relational database and what Python libraries aren't available on the GAE platform (and what alternatives Google provides). Basically I'm looking for any hidden roadblocks before I commit to the platform. Thanks for your help!

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• Equiv of glDrawpixels that operates on GPU memory?

  - by anon

  glDrawPixels(GLsizei width, GLsizei height, GLenum format, GLenum type, const ovid *pixels); Is there a function like this, except instead of accessing CPU memory, it accesses GPU memory? [Either a texture of a frame buffer object]

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• Visual Studio 2010, how to build projects in parallel on multicore

  - by thomas nn

  I have a big solution with more than 40 projects. Almost half of them are test projects. In my project we use both Code Contracts, Code Analysis, Style Analysis. I want to be able to build the projects that are not dependent in parallel on my quad core CPU. How can I setup msbuild to build the projects in parallel?

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• On App Engine, what does optimization for reads mean?

  - by Honza Pokorny

  In the documentation for Google App Engine, it says that when designing data models for the datastore, you should "optimize for reads, not writes". What exactly does this mean? What is more 'expensive', CPU intensive or time consuming?

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• Running on Windows CE 6 'and' Windows XP

  - by Psychic

  Is it possible to create a small program that will run, without recompiling and without emulators, on both Windows CE 6 AND Windows XP SP3? From my knowledge, this isn't possible. Source code needs to be recompiled for the target platform. However, a hardware manufacturer for embedded boards is claiming otherwise. The application isn't anything complex, just a simple benchmarking tool analysing floating point operations, CPU ticks etc, and displaying the results on a plain GUI.

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• Gradient colors in Internet Explorer

  - by Jeremy

  I know that Internet Explorer has some proprietary extensions so that you can do things like create divs with a gradient background. I can't remember the element name or it's usage. Does anyone have some examples or links?

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• Bash: easy way to put a configurable load on a system?

  - by WizardOfOdds

  In order to test how a program reacts when system resources become scarce (mainly the CPU but I'm interested in disk I/O too), I'd like to put an arbitrary load on the system. Currently I'm doing something like this: #!/bin/bash while true do echo "a" >> a.txt md5 a.txt done I could also start mp3-encoding audio files, or whatever. What would be an easy and small Bash script that could be used to simulate an arbitrary load, ideally configurable using parameter(s)?

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• Mass update of data in sql from int to varchar

  - by Christopher Kelly

  we have a large table (5608782 rows and growing) that has 3 columns Zip1,Zip2, distance all columns are currently int, we would like to convert this table to use varchars for international usage but need to do a mass import into the new table convert zip < 5 digits to 0 padded varchars 123 becomes 00123 etc. is there a way to do this short of looping over each row and doing the translation programmaticly?

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• Challenging question find if there is an element repeating himself n/k times

  - by gleb-pendler

  here how it's goes: You have an array size n and a constant k (whatever) you can assume the the array of int type tho it kind be of whatever type but just for the clearane let assume it's an integer. Describe an algorithm that finds if there is an element/s that repeat itself at least n/k times... if there is return one - do it in linear time running O(n) Imortent: now the catch do this algorithm or even pseuo-code using a constant usage of memory and running over the array only TWICE!!!

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• What are some lesser known usages of #pragma?

  - by Xavier Ho

  I've never understood the need of #pragma once when #ifndef #define #endif always works. I've seen the usage of #pragma comment to link with other files , but setting up the compiler settings was easier with an IDE. What are some other usages of #pragma that is useful, but not widely known?

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• Project Performance Evaluation and Finding Weak Areas

  - by pramodc84

  I'm working in J2EE web project, which has lots of Java, SQL scripts, JS, AJAX stuff. Its been 5 years for project still running fine. I have assigned with work of performance evaluation on the project as there might be some memory usage issues, DB fetching logic delays and other similar weak performance areas. From where should I begin? Any best practices to make project better?

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• Naming conventions for complex getters in Java

  - by Simon

  Hi there! I was reading this C# article about the usage of properties and methods. It points out why and when to use properties or methods. Properties are meant to be used like fields, meaning that properties should not be computationally complex or produce side effects I was asking myself how you could express this difference in Java, where you only use getters for the retrieval of data. What is your opinion?

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• How to fetch parameters when using the Apache Commons CLI library

  - by Mridang Agarwalla

  I'm using the Apache Commons CLI to handle command line arguments in Java. I've figured out my way around it to a decent extent but I need a little help. I've declared the a and b options and I'm able to access the value using CommandLine.getOptionValue. Usage: myapp [OPTION] [DIRECTORY] Options: -a Option A -b Option B How do I declare and access the DIRECTORY variable? Thank you.

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• Are there scenarios where WCF RIA Serivces isn't a good choice ?

  - by data

  Since Silverlight 4 Microsoft recommends the usage WCF RIA services for business applications. Are there scenarios, where the WCF RIA serices should no be used and plan WCF services or webservices or other techniques are the better choice ?

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• How can I determine which w3wp.exe process belongs to which web site?

  - by Michael Bray

  I have an IIS6 web server that is hosting two application pools. Occasionally, one of the w3wp processes will spike the CPU for a while, and both app pools seem to suffer the consequences. I'm not sure which one is which, and without that information I don't know which application to blame. How can I tell which w3wp belongs to which App Pool?

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• Are there any .net classes/functions that are optimized for multiple cores?

  - by diamandiev

  I know that the developer is supposed to do this himself. But seeing how we are getting cpu's with more and more cores and there are still many developers who do not use multithreading, if we have this functionality built in, it could increase performance dramatically in some scenarios. One particular example where this could be quite useful is in image processing. I doubt that the built in GDI+ classes are multithreaded.

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• Does Visual Studio 2010 benefit from quad core vs dual core machines? Is compilation multithreaded?

  - by Tony_Henrich

  I have a Windows XP machine with a dual core 3.6G CPU and 4megs. I am not very happy with the performance. I was wondering if compilation in VS 2010 is multithreaded and does VS 2010 benefit from switching from dual to quad core machine?

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• Thread affinity

  - by mita

  Can we set two thread or two task to execute with different processor affinity in C#.net Application? I have read about SetThreadAffinityMask but there is no example to have that used.. or Is there any way TPL(Task Parellel Libray) executes two thread/Task in with high priorty to use 100% cpu ?

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• Imputing missing data in aligned sequences

  - by Kwame Oduro

  I want a simple perl script that can help me impute missing nucleotides in aligned sequences: As an example, my old_file contains the following aligned sequences: seq1 ATGTC seq2 ATGTC seq3 ATNNC seq4 NNGTN seq5 CTCTN So I now want to infer all Ns in the file and get a new file with all the Ns inferred based on the majority nucleotide at a particular position. My new_file should look like this: seq1 ATGTC seq2 ATGTC seq3 ATGTC seq4 ATGTC seq5 CTCTC A script with usage: "impute_missing_data.pl old_file new_file" or any other approach will be helpful to me. Thank you.

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• Xampp / Wamp / Whatever it is, Apache is running super slow...

  - by Michael

  I've got my windows pc (localhost) running xampp, it loads the pages sometimes really quick or sometimes really slow... So I figured and searched and was recommended to get wamp. So I got that and installed it, still... the pages load so damn slowly. No heavy cpu load or anything, all my ports are open too. Any ideas?

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• Getting the download count of a specific S3 object

  - by phidah

  I've got a number of S3 objects that are available to my customers. Since I'd like to bill my customers by usage, I wondered if there is any smart kind of way to get the number of times a given file has been downloaded? Alternatively, I suppose I could parse the log files provided by S3, but with 10m+ fetches per customer this might be bit of a task. Any ideas?

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• using Visual Studio 2010 and speech recognition on windows 7?

  - by Kevin Won

  I've never used Speech Recognition (SR) at all, but I'm hearing that the built-in SR capabilities of windows 7 is not half-bad. I'm thinking that it might be a real productivity booster with Visual Studio so I can decrease the use of the mouse (no Emacs comments please ;-). I don't envision not using the keyboard to type the actual code--but maybe that would work too? Does anyone have experience using SR with Visual Studio on Windows 7? If so, any tips on usage?

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• ASP.NET Performance, 100 "Memory Hard Faults" indiciate a memory swapping problem?

  - by Robert

  With a customer web site we currently experiences performance problems. While analyzing the problem we found an unexpected amount of of 112 "Memory Hard Faults" per minute. Does anybody can interpret the meaning of this value? Does this happen, when memory swapping is necessary - so the root cause is not sufficient memory? Even if the CPU value seems high, it is not the main problem for the slow web site. Do you agree?

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• BadImageFormatException on dll load and Provider not registered on local machine issue

  - by thedev

  Hi guys, I am running a .net 4.0 app, Access Database on a Win 7 x64 bit OS + Office 2010(64 bit compatible provider Microsoft.ACE.OLEDB.12.0 ) Platform target x86: Provider problem: The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine Platform target x64 or Any CPU: Dll problem: System.BadImageFormatException: Could not load file or assembly 'Interop.SHDocVw, Version=1.1.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format.

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