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• Faut-il bannir les boucles "for" du C++ au profit des algorithmes de la bibliothèque standard ?

  La boucle for face aux algorithmes de la bibliothèque standard J'ai donné un jour un exercice à l'un de mes stagiaires : modifier tout le code d'un projet qu'il avait écrit pour remplacer toutes les boucles for par des algorithmes de la bibliothèque standard. Au-delà de ma simple tendance naturelle à torturer les stagiaires, je trouvais cet exercice intéressant pour plusieurs raisons. La première est pédagogique, pour habituer mon stagiaire à apprendre et à utiliser les outils existants de la bibliothèque standard plutôt que repartir systématiquement de zéro. La seconde raison est une question d'expressivité. Lorsque l'on rencontre un for dans le code, on ne peut pas savoir que va faire ce code. Il est nécessaire de l...

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• Hibernation is still missing from menu in 13.10 after enabling via polkit. How to enable?

  - by LiveWireBT

  I know that since 12.04, we need to add a policykit rule to enable hibernation (see question How to enable hibernation? and the Official Documentation). I can successfully bring my laptop into hibernation mode with sudo pm-hibernate or sudo s2disk, so the rule is in place and works, but the hibernation entry is still missing in the menu. I can tell from looking through the source of the indicator-session package (but not understanding the whole code) that there is still a hibernation menu entry in the code and it should be displayed when the system is capable of hibernating. Please calm down if you're enraged by this. This is very unlikely to be a conspiracy, but rather a bug/regression on a deeper level, which can happen when you move code around or replace it. Question: What needs to be done in 13.10 to properly tell indicator-session that the system can hibernate? Possible duplicate: Hibernation still not available - No activity, because saucy was in development at that time, so out of scope for AskUbuntu. Related bug report: https://bugs.launchpad.net/ubuntu/+source/indicator-session/+bug/1232814

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• problem booting wubi. Panic occuerd

  - by Scott

  This is the first time I tried Ubuntu. I downloaded the Wubi so I can try it and still have the Windows XP Pro. I ran the install after that it said to rebot so I did. Then I was asked if I wanted to run windows or ubuntu I selected ubuntu. Some code flashed by it went to the ubuntu logo screen. Then some more code and it stops with the code. 73.928015 Panic occured, switching back to text console I have tried it three times and it stops in the same place and won't go any further. Anybody no wants wrong with it?

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• How does a collison engine work?

  - by JXPheonix

  Original question: Click me How exactly does a collision engine work? This is an extremely broad question. What code keeps things bouncing against each other, what code makes the player walk into a wall instead of walk through the wall? How does the code constantly refresh the players position and objects position to keep gravity and collision working as it should? If you don't know what a collision engine is, basically it's generally used in platformer games to make the player acutally hit walls and the like. There's the 2d type and the 3d type, but they all accomplish the same thing: collision. So, what keeps a collision engine ticking?

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• Panning a 3d viewport in 2d direction with rotated camera

  - by Noob Game Developer

  I am using below code to pan the viewport (action script 3 code using flare3d framework) _mainCamera.x-= Input3D.mouseXSpeed; _mainCamera.z+= Input3D.mouseYSpeed; Where as Input3D.mouse[X|Y]Speed gives the displacement of the mouse on the X/Y axis starting from the position of the last frame. This works perfect if my camera is not rotated. However, if I rotate the camera (x by 30, y by 60) and pan the camera then it goes wrong. Which is actually correctly panning according to the code. But this is not desired and I know I need to do some math to get the correct x/y which I am not aware of it. Can some one help me achieving it? Update: I am getting an Idea but I am not sure how to do it :( Get the mouseX/Y deltas (xd,yd) Get the current camera coords (pos3d) Convert to screen coords (pos2d) Add deltas to screen coords (pos2d+ (xd,yd)) Convert above coords to 3d coords

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• Techniques to increase logic at programming

  - by u3050

  I am into programming since last 3 years. But I seems to be lost in it. I am not able to get good at it even though I code everyday. suppose I solve one problem, I will wander from solution to solution and implement some other solution. I cant focus much. I get many defects for the code I write. I afraid of code I dont know why if I dont finish it on time my boss will fire me etc. I enjoy coding but not all the time. How to increase patience? I always wonder how do I become the best coder like many exceptional programmers. I know this sounds subjective but I think this will help programmer community to get good at it especially for average like me or beginner programmers.

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• How can I neatly embed Flash in a page in a way that is cross-browser compatible?

  - by Mark Hatton

  When I receive Flash objects from my designer, it comes with an example HTML page which includes both <object> tags and <embed> tags as well as a whole heap of JavaScript. If I copy and paste this code in to my webpage, it works, but the code looks a mess (and there is so much of it!). If I remove the extra code and try either just <embed> or <object> on their own, it works in some browsers, but not others. Is there a neat, minimal method that works in all the major browsers?

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• Term for Production Rollback

  - by trainer

  The firm I work at keeps a copy of the compiled source code on production. So basically on our Production server, we have two folders: ProductionServer\SourceCode\ ProductionServer\SourceCodeRollback\ The Rollback folder always contains one version older code. This is done so that on deployment nights, if something is wrong with the new code, the deployer(who is not familiar with source control software) has the older version to revert back to. My question is: Is there an official computer science term/nomenclature for the Rollback folder? Or is "Rollback" itself the official term?

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• Should I use the factory design pattern for every class?

  - by Frog

  I've been writing a website in PHP. As the code becomes more complex, I keep finding problems that can be solved using the factory design pattern. For example: I've a got a class Page which has subclasses HTMLPage, XMLPage, etc. Depending on some input I need to return an object of either one of these classes. I use the factory design pattern to do this. But as I encounter this problem in more classes, I keep having to change code which still initiates an object using its constructor. So now I'm wondering: is it a good idea to change all code so that it uses the factory design pattern? Or are there big drawbacks? I'm currently in a position to change this, so your answers would be really helpful.

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• Adapting Javascript game for mobile

  - by Cardin

  I'm currently developing a Javascript web game for desktop users. It is a sort of tower-defense game that relies on mouse input only, developed on canvas using EaselJS. In the future, or perhaps simultaneously, I would like to adapt the game for mobile devices. I can see at least 3 potential areas in shifting from desktop to mobile: 1. resolution size and UI rearrangement, 2. converting mouse events to touch events, 3. distribution as native app wrapper or mobile Web. What would be the best strategy to facilitate this desktop to mobile conversion? For example, should I try to code the game for both platforms, or port the game UI over to mobile by branching the code base. Should I just publish on the mobile Web or wrap the game in a native app framework? And if I were to code for both platforms using the same codebase, should I register both click and touch events, or remap click events to touch using dispatchEvent?

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• Can I use the test suite from an open source project to verify that my own 'compatible library' is compatible?

  - by Mark Booth

  The question Is it illegal to rewrite every line of an open source project in a slightly different way, and use it in a closed source project? makes me wonder what would be considered a clean-room implementation in the era of open source projects. Hypothetically, if I were to develop a library which duplicates the publicly documented interface of an open-source library, without ever looking at the source code for that library, could that code ever be considered a derivative work? Obviously it would need the same class hierarchy and method signatures, so that it could be a drop-in replacement - could that in itself, be enough to provoke a copyright claim? What about if I used the test suite of the open source project to verify whether my clean implementation behaved in the same way as the original library? Would using the test suite be enough to dirty my clean code? As should be expected from a question like this, I am not looking for specific legal advice, but looking to document experiences people may have had with this sort of issue.

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• When is using stdio preferable to fstream?

  - by Karl Bielefeldt

  I work on a well-established, embedded C++ code base. We have been using a proprietary API to our filesystem. For better integration with third-party C libraries, we are currently in the process of implementing most of stdio.h and fcntl.h. I made what I thought was a non-controversial proposal that we should also implement the fstream class and encourage new C++ code to use it instead of the new (to our code base) C-style API. We already have the stdout parts of iostream available, although it is not widely used. Given a choice between using stdio and fstream, what are good reasons to choose stdio for embedded software development in C++?

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• NDepend v4 has just been released!

  - by Vincent Maverick Durano

  Few months ago I blogged about the release of NDepend v3 Continuous Integration and Reporting Capabilities here. Recently, the NDepend team has released v4 which comes with code rules based on C# LINQ queries (CQLinq), this make code ruling so much more powerful and flexible. There are couple of new rules available like: http://www.ndepend.com/DefaultRules/webframe?Q_UI_layer_shouldn't_use_directly_DB_types.html http://www.ndepend.com/DefaultRules/webframe?Q_Types_with_disposable_instance_fields_must_be_disposable.html http://www.ndepend.com/DefaultRules/webframe?Q_Avoid_the_Singleton_pattern.html http://www.ndepend.com/DefaultRules/webframe?Q_Avoid_making_complex_methods_even_more_complex_(Source_CC).html v4 also provides NDepend.API and a dozen of open-source code tool developed with NDepend.API (the Power Tools) http://www.ndepend.com/API/webframe.html

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• Repeater vs. ListView

  - by MoezMousavi

  I do really hate repeater. I was more a GridView lover but after 3.5 be born, I prefer ListView.  The first problem with Repeater is paging. You will need to write code to handle paging. Second common problem is empty data template. Have a look at this:             if (rptMyRepeater.Items.Count < 1)             {                 if (e.Item.ItemType == ListItemType.Footer)                 {                     Label lblFooter = (Label)e.Item.FindControl("lblEmpty");                     lblFooter.Visible = true;                 }             }   I found the above code is usefull if you need to show something like "There is no record" is your data source has no records. Although the ListView has a template.   If you combine ListView with a DataPager, you will be in heaven as it is sorting the paging for you without writing code. (http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.datapager.aspx)     Note: You have got to bind ListView in PreRender, it doesn't work properly in PageLoad   More: http://www.4guysfromrolla.com/articles/061009-1.aspx

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• How to handle an arrogant coworker [closed]

  - by Guy

  In my workplace I have a coworker who have been working in the company for 3 years (1 more than me) doing stuff surrounding to software development but not software development. We need to run a new project in C and we have a lot of professional disagreements that in my opinion are caused by too much pride to his skill. For example he strives to insert code unnecessary code generation using C macros as possible instead of writing the same C code with the correct separations to functions. I tried to explain to him why inline function are a better replacement for C macros but he said to me that he knows better than gcc how to inline a function. How can I handle such a person?

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• How to organize functional programs

  - by bleakcabal

  In OOP, your basic unit of organization for code is the class. A frequently used methodology in Java, C# and similar languages is to organize your code around having one file for each class with the file name following the class name. You can consider each of these class as a unit of organization to group a single concept. These classes are in in namespaces which often follow the directory structure of the files in the solution/project. Namespaces are another level of organization. How are large projects in functional languages typically organized? How to you determine how to split your functions into different files? Are other units of grouping beside files used? How is code typically organized within a single file?

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• How to get experience in large scale databases?

  - by Justin

  I have written applications that are very small scale and the code I write works fine for them. But I have often wondered how the server side code I write would scale up from 100s of queries per day to millions. Also when looking at possible jobs/projects, people are often looking for developers with experience in this sort of high traffic database design so I would at least like to be able to say, I havent gotten to work on a project that was this popular, but I at least have tried to simulate it. Are there tools or frameworks that can generate a lot of traffic or at least simulate what would happen with traffic on different orders of magnitude so I could get some practice writing optimized code for higher traffic applicaitons?

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• How to write loosely coupled classes in node.js

  - by lortabac

  I am trying to understand how to design node.js applications, but it seems there is something I can't grasp about asynchronous programming. Let's say my application needs to access a database. In a synchronous environment I would implement a data access class with a read() method, returning an associative array. In node.js, because code is executed asynchronously, this method can't return a value, so, after execution, it will have to "do" something as a side effect. It will then contain at least 1 line of extraneous code which has nothing to do with data access. Multiply this for all methods and all classes and you will very soon have an unmanageable "code soup". What is the proper way to handle this problem? Am I approaching it the wrong way?

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• Java Error Using Loops [migrated]

  - by Shaun

  I am facing a error in Java using the method Loops. I am a basic user learning Java and I am following a book with teaches you the basics of Java. I have this problem when I use this code in my Java Program. It gives me an red line under my code. Here's my code: public class Game{ public static void main(String[] args){ for (int dex = 0; dex < 1000; dex++) { if (dex % 12 == 0) { System.out.println(“#: “ + dex); } } } } I have been following the tutorials correctly. I am a bit lost where I have gone or done wrong. I have my public static codes and such as you'd require in any Java programming. Here's are the error given): Cannot resolve method: 'Println(? , ?)' Expression expected ',' or ')' expected Unexpected Token ';' expected

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• Continuous Integration, what are the strategies to manage binary content?

  - by sebas

  Currently we are testing various configurations between Feature Branching and CI with Feature toggling. I can see there are several viable options out there for the code, but I also know that CI totally relies on the possibility to merge the code. So I wonder, how do you manage CI with binary data, like art assets? I can also see another problem: all the code can be tested before to commit, I can even validate the data before to commit, but how can I test the art?! Should I use another methodology for art content?

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• Non-mathematical Project Euler (or similar)?

  - by Juha Untinen

  I checked the post (Where can I find programming puzzles and challenges?) where there's a lot of programming challenges and such, but after checking several of them, they all seem to be about algorithms and mathematics. Is there a similar site for purely logic/functionality-based challenges? For example: - Retrieve data using a web service - Generate output X from a CSV file - Protect this code against SQL injection - Make this code more secure - What is wrong with this code (where the error is in logic, not syntax) - Make this loop more efficient Does a challenge site like that exist? Especially one that provides hints and/or correct solutions. That would be a very helpful learning site.

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• Help on PHP CURL script [closed]

  - by Sumeet Jain

  This script uses a cookie.txt in the same folder chmoded to 777... The problem i am facing is i hav many accounts to login... Say if i hav 5 accounts...i created cookie1.txt,cookie2.txt an so on.. then the script worked..with the post data But i want this to be always logged in and post data.. Can anyone tell me how to do this????? Code which works for login and post data is http://pastebin.com/zn3gfdF2 Code which i require should be something like this ( i tried with using the same cookie.txt but i guess it expires :( ) http://pastebin.com/45bRENLN Please help me with dealing with cookies... Or suggest how to modify the code without using cookie files...

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• Android 2.2 repéré sur le Net, la prochaine version de l'OS mobile de Google pourrait arriver offici

  Android 2.2 repéré sur le Net La prochaine version de l'OS mobile de Google pourrait arriver officiellement en mai "Froyo", nom de code de la future version d'Android, a été repéré sur le Net. Google serait donc en train de tester Android 2.2 en interne. C'est en tout cas ce que croit savoir Android and Me, un site spécialisé - entre autre - dans la mesure du trafic d'Android. [IMG]http://ftp-developpez.com/gordon-fowler/android22.png[/IMG] Cette nouvelle version proposera un compilateur JIT (pour Just In Time), une méthode qui permet la compilation en temps réel d'un code vers le code natif de l'appareil et de garder le résultat en ...

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• Creating an Interface To a Language's Standard Library?

  - by Nathan Arthur

  In the process of learning test-driven development, I've been introduced to dependency injection and the use of interfaces, and have started using these concepts in my own PHP code in order to make it more testable. There have been times when I've needed to test code that was doing things like calling the PHP time() function. In order to make these tests predictable, it seemed logical to create an interface to the standard PHP functions I use so that I can mock them out in my tests. Is this good software design? What are the pros and cons of doing this? I've found myself groaning at how quickly my PHP interface can stick its fingers into everything I do. Is there a better way to make code that relies on PHP-accessed state and functions more testable?

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• Wordpress Multisite (Subfolders) - Google Analytics Tracking

  - by mmundiff

  I have a Wordpress multisite subfolder instance that I would like to track via Google Analytics. I guess optimally this would be a plugin which I could track each site in two places The Main Tracking Code which totals all traffic from the Multisite instance The Individual Site tracking code to see how each site specifically is doing. I think this plugin would have worked for me if I had a subdomain multisite instance: http://wordpress.org/extend/plugins/google-analytics-multisite-async/installation/ I know I can manually place the dual tracking code (http://www.markinns.com/articles/full/adding_two_google_analytics_accounts_to_one_page) but that would involve editing a theme and I have multiple sites using TwentyEleven template. I don't think I can edit the theme and not have it wreak havoc on the rest of the sites using TwentyEleven. So has anyone done this? Is there a a technique I'm missing? Is there a plugin available to do this in Multisite Subfolder installations? Is there a way to manually insert GA codes into themes which are used by multiple sites? Any insight is appreciated.

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