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• Background process and SIGHUP

  - by Charles Salvia

  My understanding is that a program that is associated with a terminal will receive the SIGHUP signal if that terminal is closed. This usually will terminate the program. I also know that you can use the nohup command along with the & symbol to run the program in the background, and disassociate it from the terminal so that the program is not terminated when the terminal closes (on log out.) However, suppose a program is run normally without nohup, but is then suspended using Cntl-Z. If the program is then resumed in the background using the bg command, will it receive the SIGHUP signal on log out? Or to put it another way: if I have a program which is already running, and I don't want to stop it but I'd like to log out, can I suspend it using Cntl-Z and run it in the background using bg? Or will the program be terminated when I log out?

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• How do I get a matching theme when I run a program as root?

  - by NES

  I use a Metacity theme in my Ubuntu installation. Unfortunately it isn't activated for programs with Gui that are started as root user and some other other certain programs like gufw (when i start gufw by commandline not as root)? It uses an old not very eyecandy Theme. For example for Gufw is gives the following output on commandline: /usr/share/themes/Finery/gtk-2.0/gtkrc:365: error: unexpected number `0', expected number (float) /usr/share/themes/Finery/gtk-2.0/gtkrc:365: error: unexpected number `0', expected number (float) What could be the reason, is there a way how to enable this theme also for these programs?

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• Is there any way to optimize my search blob program?

  - by Vicky

  I written this code to search the blob items (text files) on the basis of there content. For ex : if I search for "Good", then the files that contains "Good or good" word the name of that files should appear in search result. My code is working but i want to optimize it. class BlobSearch { public static int num = 1; static void Main(string[] args) { string accountName = "accountName"; string accessKey = "accesskey"; string azureConString = "DefaultEndpointsProtocol=https;AccountName=" + accountName + ";AccountKey=" + accessKey; string blob = "MyBlobContainer"; string searchText = string.Empty; Console.WriteLine("Type and enter to search : "); searchText = Console.ReadLine(); CloudStorageAccount account = CloudStorageAccount.Parse(azureConString); CloudBlobClient blobClient = account.CreateCloudBlobClient(); CloudBlobContainer blobContainer = blobClient.GetContainerReference(blob); blobContainer.FetchAttributes(); var blobItemList = blobContainer.ListBlobs(); GetBlobList(searchText, blobContainer, blobItemList); Console.ReadLine(); } private static async void GetBlobList(string searchText, CloudBlobContainer blobContainer, IEnumerable<IListBlobItem> blobItemList) { foreach (var item in blobItemList) { string line = string.Empty; CloudBlockBlob blockBlob = blobContainer.GetBlockBlobReference(item.Uri.ToString()); if (blockBlob.Name.Contains(".txt")) { await Search(searchText, blockBlob); } } } private async static Task Search(string searchText, CloudBlockBlob blockBlob) { string text = await blockBlob.DownloadTextAsync(); if (text.ToLower().IndexOf(searchText.ToLower()) != -1) { Console.WriteLine("Result : " + num + " => " + blockBlob.Name.Substring(blockBlob.Name.LastIndexOf('/') + 1)); num++; } } } I think blobContainer.ListBlobs(); is blocking code because search will not work until all the blob items loaded. Is there anyway to optimize it or anywhere else in my code. Thanks

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• How do I simplify a 2D game grid for level management while keeping its by-pixel features?

  - by Eric Thoma

  (I cross-posted this from StackOverflow as this seems to be a more appropriate forum. I've looked around a little here and I did not find an answer, so I hope this is not a recurring question.) This is a question dealing with 2D world design. I am playing around by creating a 2D bird's eye view shooter game, and I am looking to make the game sleek and advanced. I hope to be able to write physics so projectiles have momentum and knock-down properties. I am immediately running into the problem of world design. I need a way to have level files that store everything there is about a game. This is easiest by just having a grid of objects. But there are thin-walls and other objects that don't seem to fit into a traditional cell of a grid. I want to be able to fit all these together so I can streamline level design; so I don't have to put in the exact pixel-specific start and end of a wall. There doesn't seem to be an obvious translation from level file to game without forcing myself into a pacman-life scenario, meaning a scenario where the game feels boxy and discrete. There is a contrast between the smoothly (relatively) moving characters and finite jumps in a grid. I would appreciate an answer that would describe implementation options or point me to resources that do. I would also appreciate references to sites that teach game design. The language I am using is Java (although I would love to use C or C++, but I can never find convenient resources in those languages). Thank you for any answers. Please leave any questions in the space below; I will be able to answer them later tonight (28th Nov).

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• Uninstall libgl? Program using libgl instead of Nvidia's OpenGL libraries

  - by Tek

  I'm running Ubuntu 12.10 64-bit. I'm trying to get valve's new Linux Steam client running, but having a bit of trouble getting it to detect the right libraries or at least I think that's the issue. I installed the latest 310.19 Nvidia proprietary drivers from geforce.com. Here's the screenshot: I tried uninstalling xserver-xorg-video-nouveau thinking this was the problem but I'm still getting the same error. Any ideas what I can do for Steam to detect the right Nvidia OpenGL libraries?

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• What Scripting Program would you choose to recover deleted and missing files?

  - by Steven Graf

  For a private project I'm looking for a command line tool to scan and recover files. I'm working on Gnome 3 (but I could also change my OS if it helps reaching my goal) and must be able to find and recover files on attached devices with formats such as NTFS, Fat32, MAC OS Extended and ext3. Is there a command line script to cover all of them or do I need to use different programs to reach my goal? can you recommend command line tools for these kind of tasks? is one of you willing and able to show me some examples and teach me further?

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• Why can't dash search find a program by its full name?

  - by Peter De Maeyer

  For some applications, dash search comes up empty when searching by the application's full name. When typing the first couple of letters, it works. I wonder why... MuseScore is a fine example. When I search for "muse" in the dash search, MuseScore is found. When I search for "musescore", nothing is found. This behavior makes me distrustful of the dash search... I wonder how often it misses installed programs... I like to be able to trust the software tools I'm using.

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• I don't program in my spare time. Does that make me a bad developer?

  - by not-my-real-name

  A lot of blogs and advice on the web seem to suggest that in order to become a great developer, doing just your day job is not enough. For example, you should contribute to open source projects in your spare time, write smartphone apps, etc. In fact a lot of this advice seems to suggest that if you don't love programming enough to do it all day long then you're probably in the wrong career. That doesn't ring true with me. I enjoy my work, but when I come home from the office I'm not in the mood to jump straight back onto the computer and start coding away until bedtime. I only have a certain number of hours free time each day, and I'd rather spend them on other hobbies, seeing friends or going outside than in front of the computer. I do get a kick out of programming, and do hack around outside of work occasionally. I'm committed to my personal development and spend time reading tech blogs and books as a way to keep learning and becoming better. But that doesn't extend so far as to my wanting to use all my spare time for coding. Does this mean I'm not a 'true' software developer at heart? Is it possible to become a good software developer without doing extra outside your job? I'd be very interested to hear what you think.

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• what are the duties of a software control management (scm) engineer in a large company?

  - by Alex. S.

  I'm curious about what are the canonical responsibilities of such specialized role. Normally, I expected this to be part of the tasks of a normal developer, but in large companies I know this role is to be fulfilled by an engineer in his own. In my current company, there is a possibility for a new opening in a SCM position, so I could apply, but first I would like to hear about what, in your experience, characterize best this role.

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• Is there a program to manage movies and TV shows that supports mp4 tags?

  - by root45

  I'm looking for a media manager that will display and play movies and TV shows and will read data included in mp4 and m4v files. So far I've looked at XBMC, Moovida and Boxee and all of these seem to keep their own separate database or XML files for reading and storing tag information. I also looked at Banshee because of this answer, but it didn't read my tags. Banshee is also geared towards music videos instead of actual movies and TV shows. So I'm looking for software that Displays and plays movies and TV Shows Reads mp4 and m4v tags Preferably something with bulk import (i.e., I don't want to add 1,000 items to a new library) Bonus if it also has a tag editor Bonus if it's an XBMC extension

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• Is it OK to live without knowing how the program you created works?

  - by Kabumbus

  I mean, there are really useful libs that can solve problems when you are stuck and do not know how to solve this or that with your knowledge of programing language you use... For example, Boost for C++ or JQuery for JavaScript or Spring for Java... They solve problems in seconds and you do not really care how they did it (despite that they are written in the very same language you are programming in)... So I wonder am I alone use libs not being capable to write solutions for my problems from scratch or its standard practice?

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• When is a glue or management class doing too much?

  - by jprete

  I'm prone to building centralized classes that manage the other classes in my designs. It doesn't store everything itself, but most data requests would go to the "manager" first. While looking at an answer to this question I noticed the term "God Object". Wikipedia lists it as an antipattern, understandably. Where is the line between a legitimate glue class, or module, that passes data and messages from place to place, and a class that is doing too much?

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• Should I continue to learn and program using ansi c or non standard? [closed]

  - by Erik

  I am a Cs Student, enthusiastic about programming. C is my first programming language that I learned. (Never been exposed to programming, data structures, algorithms before) I failed the exam because I studied on my own and didn't know how to use windows non standard libraries like conio.h. (I had to draw circles, etc using get x and get y). I told them but they just don't care. What do I do because for a beginner this is very confusing? Do I continue to study ansi c on my own, or should I study non standard c? Should I do them in parallel? *I did use the search bar but found nothing useful that could help me.

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• How to profile a Perl + FastCGi + StarRunner web program?

  - by Paul Tomblin

  I've written an extension to RequestTracker for a client, but he says the performance isn't good enough. I'd like to do some profiling, but I'm not sure how to connect up a profiler (say NYTProf, for example)? I tried what the man page says and put PerlModule Devel::NYTProf::Apache in my apache config, but all I get in the results are Apache2:XSLoader, Devel::NYTProf::Apache and ModPerl::Util modules in the results, and neither my own nor RT's modules.

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• How far can you get in iOS without learning PhotoShop or another graphic design program? [on hold]

  - by Aerovistae

  I'm in the process of learning iOS, and I'm coming from a web dev background where CSS controls 70-90% of the UI, and Python/C++ desktop dev where there are highly customizable UI toolkits for most things. I'm trying to figure out how people make good-looking apps without graphic design skills. You always hear about some 8 year old or 14 year old who made a successful app. So I assume that even if the required code was relatively basic, the app must have looked good if it was a success. But I find it really unlikely that these kids have advanced PhotoShop skills as well as having learned iOS programming at such a young age. Frankly, the same goes for most independent app developers....as they say, unicorns don't exist. So what's the deal? Can you make a good-looking, market quality app without those skills? What are the limitations?

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• Should sanity be a property of a programmer or a program?

  - by toplel32

  I design and implement languages, that can range from object notations to markup languages. In many cases I have considered restrictions in favor of sanity (common knowledge), like in the case of control characters in identifiers. There are two consequences to consider before doing this: It takes extra computation It narrows liberty I'm interested to learn how developers think of decisions like this. As you may know Microsoft C# is very open on the contrary. If you really want to prefix your integer as Long with 'l' instead of 'L' and so risk other developers of confusing '1' and 'l', no problem. If you want to name your variables in non-latin script so they will contrast with C#'s latin keywords, no problem. Or if you want to distribute a string over multiple lines and so break a series of indentation, no problem. It is cheap to ensure consistency with restrictions and this makes it tempting to implement. But in the case of disallowing non-latin characters (concerning the second example), it means a discredit to Unicode, because one would not take full advantage of its capacity.

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• Could it be more efficient for systems in general to do away with Stacks and just use Heap for memory management?

  - by Dark Templar

  It seems to me that everything that can be done with a stack can be done with the heap, but not everything that can be done with the heap can be done with the stack. Is that correct? Then for simplicity's sake, and even if we do lose a little amount of performance with certain workloads, couldn't it be better to just go with one standard (ie, the heap)? Think of the trade-off between modularity and performance. I know that isn't the best way to describe this scenario, but in general it seems that simplicity of understanding and design could be a better option even if there is a potential for better performance.

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• How do I create the "Gnome-Desktop-Item-Edit" program's launch icon with root privileges and more?

  - by GanZ

  I personally dont prefer running commands in terminal to achieve a task and prefer apps to execute the job. Creating launcher for apps is one such command where I prefer the gnome-desktop-item-edit application for creating launchers. If the gnome package is installed, just searching "create launcher" opens the app. But, it doesnt serve any purpose, because for starters the application cannot create launchers for various apps without root permission and the location where the apps have to be created. Usually the launcher apps with root permission can be created at /usr/share/applications and without root permission at /.local/share/applications. I dont prefer the latter location as it is vulnerable to deletion. Hence, in order to create the launchers through gnome with root, everytime I am forced to open this through terminal using the below command! $ sudo gnome-desktop-item-edit ~/.local/share/applications --create-new I dont want to open terminal everytime I want to create an application launcher on unity! I am able to lock the "Create Launcher" App in the Launcher, but not with root privileges So I want to be able to create the "Create Launcher" app shortcut on unity with default root privileges and for the app to create the launchers at usr/share/applications by default! Please help! P.S. I dont have enough rep points to add screenshots to help with the question!

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• Write a program using 3 threads, one prints 10 'A's and the second prints 'B's and the third prints 10 'C's with synchrornization

  - by user132967

  Iam try to implement this questions using threads and mutex this is my code : include include include include include define Num_thread 3 pthread_mutex_t lett[Num_thread]; void Sleep_rand(double max) { struct timespec delai; delai.tv_sec=max; delai.tv_nsec=0; nanosleep(&delai,NULL); } void *Print_Sequence(); int main() { int i; pthread_t tid[Num_thread];// this is threads identifier for(i=0;i<Num_thread;i++) pthread_mutex_init(&lett[i],0); for(i=0;i<Num_thread;i++) { printf("i=%d\n",i); /* create the threads / pthread_create(&tid[i], / This variable will have the thread is after successful creation / NULL, / send the thread attributes / Print_Sequence, / the function the thread will run / &i/ send the parameter's address to the function */); } /* Wait till threads are complete and join before main continues */ for (i = 0; i pthread_join(tid[i], NULL); } return 0; } /* The thread will begin control in this function */ void Print_Sequence(void param) { int i,j=(int)param; printf("j=%d\n",(*j)); int max; pthread_mutex_lock(&lett[0]); pthread_mutex_lock(&lett[1]); for (i = 1; i <= 10; i++) { max=(int) (8*rand()/(RAND_MAX+1.0)); Sleep_rand( max); printf("A"); } pthread_mutex_unlock(&lett[0]); pthread_mutex_lock(&lett[2]); for (i = 1; i <= 10; i++) { max=(int) (2*rand()/(RAND_MAX+1.0)); Sleep_rand( max); printf("B"); } for (i = 1; i <= 10; i++) { max=(int) (15*rand()/(RAND_MAX+1.0)); Sleep_rand( max); printf("C"); } pthread_mutex_unlock(&lett[1]); pthread_mutex_unlock(&lett[2]); pthread_exit(0); } and the o/p is like : AAAAAAAAAABBBBBBBBBBCCCCCCCCCCAAAAAAAAAABBBBBBBBBBCCCCCCCCCCAAAAAAAAAABBBBBBBBBBCCCCCCCCCC COULD ANYONE PLEASE EXPLAIN WHAT IS THE WRONG WITH CODE ??

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• What is the/Is there a right way to tell management that our code sucks?

  - by Azkar

  Our code is bad. It might not have always been considered bad, but it is bad and is only going downhill. I started fresh out of college less than a year ago, and many of the things in our code puzzle me beyond belief. At first I figured that as the new guy I should keep my mouth shut until I learned a little more about our code base, but I've seen plenty to know that it's bad. Some of the highlights: We still use frames (try getting something out of a querystring, almost impossible) VBScript Source Safe We 'use' .NET - by that I mean we have .net wrappers that call COM DLLs making it almost impossible to debug easily Everything is basically one giant function Code is not maintainable. Each page has multiple files that are created every time a new page is made. The main page basically does Response.Write() a bunch of times to render the HTML (runat="server"? no way). After that there can be a lot of logic on the client side (VBScript), and finally the page submits to itself (often time storing many things in hidden fields) where it then posts to a processing page which can do things such as save the data to the database. The specifications we get are laughable. Often times they call for things like "auto-populate field X with either field Y or field Z" with no indication of when to choose field Y or field Z. I'm sure some of this is a result of not being employed at a software company, but I feel as if people writing software should at least care about the quality of their code. I can't even imagine that if I were to bring something up that anything would be done soon, as there is a large deadline looming, but we are continuing to write bad code and use bad practices. What can I do? How do I even bring these issues up? 75% of my team agree with me and have brought up these issues in the past, yet nothing gets changed.

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• What's New in PeopleSoft Human Capital Management (HCM) 9.0?

  Tracy Martin, Senior Director, HCM Strategy, tells listeners about latest enhancements in HCM 9.0 that help reduce or eliminate the pain points associated with HR policies and processes today.

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• Alias a linked Server in SQL server management studio?

  - by absentmindeduk

  Hoping someone can help - is there a way in SQL server management studio 2008 R2 that I can alias a linked SQL server? I have a server, added by IP address, to which I do not have the login credentials - however as the connection is already setup I can login ok. Issue is that, this is a dev environment, prior to a live deployment and the IP I have as a linked server needs to be 'accessible' by my stored procs under a different name, eg 'myserver' not 192.168.xxx.xxx... Any help much appreciated.

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• Should I be concerned that I can't program very fast without Google? [closed]

  - by seth

  Possible Duplicate: Google is good or bad for programmer? I'm currently in college to be a software engineer, and one of the main principles taught to us is how to learn for ourselves, and how to search the web when we have a doubt. This leads to a proactive attitude - when I need something, I go get it. Recently, I started wondering how much development would I be able to do without internet access and the answer bugged me quite a bit. I know the concept of the languages and how to use them, but I was amazed by how "slow" things were without having the Google to help in the development. Most of the problems I have are related to specific syntax. For example, reading and writing to a file in Java. I have done this about a dozen times in my life, yet every time I need to do it, I end up googling "read file java" and refreshing my memory. I completely understand the code and fully understand what it does, but I am sure that without Google it would take me a few tries to get the code correct. Is this normal? Should I be worried and try to change something in my programming behaviour?

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• How can I change the default program installation directory in Windows 7?

  - by Max

  Windows 7 is installed on my C drive, which is quite small. I am very tired of instructing new programs to put their files on my larger D drive during installation; I would like to change the default drive. This article says that you can use a registry hack, but I am giving Microsoft the benefit of the doubt and naively assuming that a configuration option exists somewhere. It's 2010... do I really have to hack my registry to make a simple tweak like this? Also, there's a ServerFault question that explains how to move the "Users" directory and create a symlink, which could also work. However, at the moment I have some apps in C:\Program Files, some apps in C:\Program Files (x86), and some apps in the corresponding folders on D:\, so it would be a hassle. Also, my small OS boot drive is a 10k RPM WD Raptor, and I feel like that probably gives a speed boost to apps installed on it that need to read & write to their directories a bunch. I wonder if it actually matters.

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• If I were to start an Android or iPhone app or game, what program should I use?

  - by John

  I don't really know a lot about programming and the only things I do is using codes with Gamemaker, but I have read that it is too basic and it can't be used with iPhone or Android. Is there anything free that I can use to make games for those platforms? Or if not, any suggestions for engines or anything else? I was wondering about Unity, for example, is that a good investment to use for making games?

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