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  • I want to read a big text file

    - by Rozer
    I want to read a big text file, what i decided to create four threads and read 25% of file by each one. and then join them. but its not more impressive. can any one tell me can i use concurrent programming for the same. as my file structure have some data as name contact compnay policyname policynumber uniqueno and I want to put all data in hashmap at last. thanks

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  • linux, LD_PRELOAD error

    - by user286215
    Hello, i am new in programming under linux and trying to get working this code: http://scaryreasoner.wordpress.com/2007/11/17/using-ld_preload-libraries-and-glibc-backtrace-function-for-debugging/ but getting error: "ERROR: ld.so: object 'libwrap_ioctl.so' from LD_PRELOAD cannot be preloaded: ignored." what can cause it? system - Archlinux, kernel 2.6.32 thank you for answers upd1: "Check with ldd libwrap_ioctl.so if some dependency of this library is missing." checked. no, i have all needed libraries

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  • How to create a screensaver?

    - by Dave
    Which is the best programming language to use for creating a screensaver? I am thinking of creating a screensaver to showcase projects i have done before for self satisfaction. How should i go about it? Thanks

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  • Porting Windows C++ to Standard (Linux) C++ - WSAGetLastError()

    - by Donal Rafferty
    I am currently porting some Windows mobile C++ code to standard C++. So I am trying to find alternatives for windows specific functions. I have had very little luck in finding a standard C++ function that can help me replace the WSAGetLastError() windows specific function. WSAGetLastError() returns error numbers for errors that occur with sockets in windows. So I was wondering if anyone was aware of a way to replace this function in standard c++? A way to get different error numbers for different outcomes of connecting/dissconection a socket would be sufficent.

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  • What's the right Java generic for a collection of elements with unique addressable indices?

    - by Rocreex
    I'm on my way to programming a database application and in our course we are told to implement a library of elements using one of the Java Collections. Each of the elements has a unique ID with which it's supposed to be addressed. Now I am wondering how this can be done. I though about using a ListArray but this won't work because the only way of addressing List elements is through the index which you can't control. Do you have some advice for me?

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  • C++ book for a c# developer

    - by Eldila
    I am a c# developer which finds himself having to relearn c++. The last time I programmed in c++ was in school and am looking for good books as a refresher. I want something that assumes previous programming exposure and gets straight to the point. Is there a book similar to K&R for c++? I know the language is bloated so a book that covers a subset of c++ would be ideal.

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  • question about heapsearch order

    - by davit-datuashvili
    ia have meet following problem suppose we have sorted array of size 2^k-1 where k is given number we should copy this array into heapsearch array b the elements in odd positions of a go in order into last half of the positions of b positions congruent to 2 modul0 4 go into b's secodn quarter and so on this is not homework and please nobody tag it as homework it is from programming pearls please any ideas

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  • Book on C++ for understanding advanced concepts

    - by Invincible
    What is good book for industry level C++ programming? I am not looking for a beginners C++ book that talks about datatypes and control structures. I am looking for a more advanced book. For example, how to build system applications using C++. Any kind of guidance will be very helpful.

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  • Windows service only gets called when Visual Studio is attached to process

    - by 64th
    I've created a simple windows service in C# using Visual Studio 2010. It uses a TcpListener and socket to listen for messages on a given port. This worked absolutely perfectly when my laptop had Windows Vista on it. However, since upgrading to Windows 7 and re-installing my service it only responds if I'm attached to the process and debugging in Visual Studio 2010 - at which time it behaves as expected. I've tried running the service under my (administrator) credentials and setting the exe to run as administrator. I've also checked "Allow service to interact with desktop" when it was running under the Local System account. I'm testing using both a test console app and an Adobe Air application - both with the same results. Are there some specific permissions that I need to allow the service to be called?

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  • 16 millisecond quantization when sending/receivingtcp packets

    - by MKZ
    Hi, I have a C++ application running on windows xp 32 system sending and receiving short tcp/ip packets. Measuring (accurately) the arrival time I see a quantization of the arrival time to 16 millisecond time units. (Meaning all packets arriving are at (16 )xN milliseconds separated from each other) To avoid packet aggregation I tried to disable the NAGLE algorithm by setting the IPPROTO_TCP option to TCP_NODELAY in the socket variables but it did not help I suspect that the problem is related to the windows schedular which also have a 16 millisecond clock.. Any idea of a solution to this problem ? Thanks

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  • Where to place a debug log files for my daemon app?

    - by sasayins
    Hi, I am using C language and Linux as my programming platform. I am learning how to create a daemon, and I want to create a log file so that I write a debug message in my daemon. My question is where should I put the log file in my system. Should I put it in the var folder? Please advice. Many thanks.

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  • Get all Vector2 Points Within Radius

    - by CheapDevotion
    I am looking for a formula that will give me all of the Vector2 Points within a certain radius given the center. Essentially what I am trying to do is change the color of each pixel in a 256 x 256 texture that is within a certain radius from a specific pixel (Using the Unity3d Game Engine). Programming Language doesn't really matter, as I can probably convert it to something I can use.

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  • Rss feed for game programmer?

    - by simpleblob
    I was browsing this thread, which has good recommendation but a bit too general for me. So, if anyone has a collection of nice game programming feeds,please share them. :) (both general and specific topics are welcome)

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  • Windows Application Data Directory

    - by JP
    Not completely a programming question, but its close enough so here goes: In Mac OS I'll put user-specific files for my app in ~/Library/Application Data/{MyApp}/ and in *nix I'll put them in ~/.{MyApp}/ - where should I put them for Windows? I'll be using Ruby's File.expand_path to get to this directory, so if there's a windows equivalent of ~ then that's fine. (Answers for Windows XP, Vista and 7 would be appreciated if they're not the same)

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  • why the sexp has array in the end

    - by dorelal
    RubyParser.new.parse "1+1" s(:call, s(:lit, 1), :+, s(:array, s(:lit, 1))) Above code is from this link Why there is array after + in the Sexp. I am just trying to learn ruby parser and the whole AST thing. I have been programming for a while but have no formal education in computer science. So do point to good article which explains AST etc. Please no dragon book. I tried couple of times but couldn't understand much of that book

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  • How to implement a timer callback that executes in the same execution context

    - by Waldorf
    Some programming environments like C++ builder have timer components with a callback function which executes in the same execution contexts as where the timer object is created. I was wondering how to do something similar in plain c++ with threading. Or are there any other ways to have a callback which is periodically called to perform some task and runs in the same execution context as the calling thread?

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  • Links pointing to a page

    - by Mio
    I know this is not a programming question, but I couldn't think of where else to ask. Does google or anybody else have a feature to let you see the list of sites pointing to a given link?

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