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  • Good book about advanced programming techniques [closed]

    - by Luca
    I am looking to a book covering adavnced programming techniques, covering different practical scenarios and describing the different challanges with the relative solutions. As example, which are the best ways to implement a module for buying on a web application with credit card or how to manage responsivenes for the frontend of the web application itself (dealing with cache, optimeze plugins, etc). On the web there are tons of tutorials about these topics, but I am looking for a book where such cases are collected all together and treated by real professionists. If the book would provide some code samples, that would be a plus (especially if C# .NET), but I am more interested in the approach/solution rather than the code details. I could not find any of these cases in the general book about programming, therefore I hope someone might point me in the right direction. EDIT: I have 4 years experience as web developer, mainly with Microsoft (C#, ASP.NET, SQL Server) and client side technologies (jQuery, HTML/CSS).

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  • How can I derive force vectors from velocity vectors?

    - by PixelRouter
    I'm making a 2d shooter ala Geometry Wars. I've got my own simple physics at work driving the background grid and all my entities. To move anything in the world I apply a Vector2d force to it. The 'engine' calculates the resulting acceleration and therefore the velocity. I am trying to port some code I found which implements the classic 'Boids' flocking algorithm, but the code I have works by calculating the Boids' velocities directly, so If i use it as is, it bypasses my physics engine. How I can translate the velocity vectors into force vectors that I can apply to the Boids and which will result in the proper velocities via my physics engine.

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  • Drag and Drop Team Selection

    - by davidjwest
    I have a Fantasy F1 Website, currently users select their teams using dropdown menus. It works OK but isn't as user friendly as I would like. I would like to implement a drag and drop type of system, there's jQuery code out there that would go part of the way to allowing me to do this: http://jqueryui.com/demos/draggable/ But I am not sure about how to integrate that into PHP and MySQL, my jQuery skills are limited! I'd also need to stop them spending more than a certain amount of money, each driver has a value and the teams can only spend a certain amount of money. There's also limits for example you can only pick a driver once, but you can have three different drivers. Finally, how would you decide that the user had picked their team, I don't want a submit button as that kind of defeats the object of the exercise! Thanks for any advice, I don't expect anyone to write the code for me but some pointers would be greatly appreciated.

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  • Saving to a file in C# [on hold]

    - by user36322
    If I use this code: using (StreamWriter streamWriter = new StreamWriter("Content/player.txt", true)) { streamWriter.Write("Hello!"); streamWriter.Close(); } The program will not actually add "Hello!" to the file. However, if I use this code: using (StreamWriter streamWriter = new StreamWriter("C:/Users/Michael/Documents/Visual Studio 2010/Projects/PuzzleGame/PuzzleGame/PuzzleGameContent/player.TXT", true)) { streamWriter.Write("Hello!"); streamWriter.Close(); } The program will work as intended and add "Hello!" to the save file. Is there any way I can do this without hardcoding the path?

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  • Sound Delay With AVAudio Player

    - by Will Youmans
    I'm using the following code in my viewDidLoad to load a sound: NSURL * url = [NSURL fileURLWithPath: [NSString stringWithFormat:@"%@/Moto - Hit Sound.mp3", [[NSBundle mainBundle] resourcePath]]]; NSError * error; hitSoundPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:url error:&error]; hitSoundPlayer.numberOfLoops = 0; Then I'm using this in a void method to play the sound: if(CGRectIntersectsRect(main.frame, enemy1.frame)){ [hitSoundPlayer play]; } This does seem to work, however the first time the sound is played there is a lot of lag and the game stops temporarily. I'm using this same method for when in an IBAction and it works fine, it must be the fact that it's also detecting a collision that makes the sound lag. If I want to be able to play sounds quickly and on the spot without any sort of lag am I doing the right thing? Do I want to use another method? I'm not using any frameworks like cocos2d. If you need to see any more code just ask.

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  • Visual Studio 2010/2012 Context Menus and a Keyboard

    - by SergeyPopov
    As a software developer, I spend a lot of time using Visual Studio. I have to say that I completely satisfied with Visual Studio generally. Nevertheless, sometimes Visual Studio starts annoying me. One issue which poisoned my existence for a long time is that context menu behavior in VS2010 is a little different than it was in VS2005/2008. Unfortunately, in VS2012 this behavior remains the same as in VS2010. So, what is the issue? Working with Visual Studio, I use the keyboard in most cases. I also use the Apps key on the keyboard to open context menus in the code editor. Moreover, long time ago I am got used to using some key sequences, and press the keys without even thinking. In VS2008, a mouse pointer position didn’t affect context menu navigation if I used the keyboard. Every time I opened a context menu I was sure that, for example, the "Apps, Down, Down, Enter, Up, Enter" key sequence always invoke "Organize Usings > Remove and Sort" function. But in VS2010, this behavior has been changed. If a mouse pointer is located over an opened context menu, the menu item under the mouse pointer becomes selected immediately! So, now the "Apps, Down, Down, Enter, Up, Enter" key sequence will not lead to expected results all the time. In some cases, the result may be a little scary. If you are using Visual SVN extension, this key sequence may invoke "Revert whole file" function. Of course, this is not a fatal problem because "Undo" function restores all the changes, but this behavior strongly annoys me. In Visual Studio 2012, context menu behavior is a little different than in VS2010, but a mouse pointer position still affects the keyboard navigation in the context menu, and this behavior is still annoying. I tried to find the way how to change this behavior, but I didn’t manage to find the answer quickly. Then I decided to go right though, so I wrote a small utility which fixes this issue. This utility watches for Apps key, and if the key is pressed in Visual Studio, the utility moves the mouse pointer to the top of the screen before opening the context menu. You can find binaries and the source code of this utility here: http://code.google.com/p/vs-ctx-menu-fix/downloads/list This utility works fine in Windows 7 and Windows 8 x64. I wrote the first version in January, 2011; now I just added Visual Studio 2012 support. I hope you will find this utility useful! :)

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  • What are some ways you use VS2010 Toolbox to be more productive?

    - by emragins
    I just saw a presenter who had pre-loaded a large number of code snippets into the Toolbox so that he could pull them into the presentation rather than trying to re-type code on the spot (or have it already integrated and trying to comment/uncomment/etc.) This seemed like an extremely effective use. It got me thinking, though, that perhaps the Toolbox is far more powerful than I've ever considered, but a couple quick google searches didn't yield what I was looking for. What are some other uses of the Toolbox that could help in productivity which may or may not be obvious?

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  • IXRepository and test problems

    - by Ridermansb
    Recently had a doubt about how and where to test repository methods. Let the following situation: I have an interface IRepository like this: public interface IRepository<T> where T: class, IEntity { IQueryable<T> Query(Expression<Func<T, bool>> expression); // ... Omitted } And a generic implementation of IRepository public class Repository<T> : IRepository<T> where T : class, IEntity { public IQueryable<T> Query(Expression<Func<T, bool>> expression) { return All().Where(expression).AsQueryable(); } } This is an implementation base that can be used by any repository. It contains the basic implementation of my ORM. Some repositories have specific filters, in which case we will IEmployeeRepository with a specific filter: public interface IEmployeeRepository : IRepository<Employee> { IQueryable<Employee> GetInactiveEmployees(); } And the implementation of IEmployeeRepository: public class EmployeeRepository : Repository<Employee>, IEmployeeRepository // TODO: I have a dependency with ORM at this point in Repository<Employee>. How to solve? How to test the GetInactiveEmployees method { public IQueryable<Employee> GetInactiveEmployees() { return Query(p => p.Status != StatusEmployeeEnum.Active || p.StartDate < DateTime.Now); } } Questions Is right to inherit Repository<Employee>? The goal is to reuse code once all implementing IRepository already been made. If EmployeeRepository inherit only IEmployeeRepository, I have to literally copy and paste the code of Repository<T>. In our example, in EmployeeRepository : Repository<Employee> our Repository lies in our ORM layer. We have a dependency here with our ORM impossible to perform some unit test. How to create a unit test to ensure that the filter GetInactiveEmployees return all Employees in which the Status != Active and StartDate < DateTime.Now. I can not create a Fake/Mock of IEmployeeRepository because I would be testing? Need to test the actual implementation of GetInactiveEmployees. The complete code can be found on Github

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  • Is it a good practice by commenting with owner name? [closed]

    - by fifth
    Possible Duplicate: How do you keep track of the authors of code? Here's several scenarios which may comment with owner name: bug fixing, i.e. // fixed bug 123 by xxx, solution is ... ... fixme/todo tags, i.e. // TODO: .... by xxx. hacks, i.e. // HACK! ... by xxx For case #2, please refer to Comment Tags The obvious advantage is that we can ease tracking by names. The downside is the risk of abuse. Actually my previous company allowed this way of commenting style, but current employer completely disallows names appearing in code. In my opinion, I would vote for discreetly commenting with author names. I'm open to hear from you if this commenting style is good or bad. Thanks.

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  • Is it advisable to ask employees to create 'work' GitHub accounts?

    - by fiorenti
    I've moved all our company Git repositories to GitHub and now I want to add employees to the projects. Since most employees already have personal GitHub accounts, I'm wondering whether I should ask them to create a work GitHub account. The reason that I'm thinking of doing this is to decrease the chances of unauthorized access to our code base since their personal accounts may be well publicized through their personal activity on the site, increasing chances of targeted attacks. Furthermore, if their personal account is ever compromised it won't mean the whole company code is accessible to the hijacker. Since this will bring the burden of maintaining two accounts for the employees I'm wondering whether it is the correct approach and whether it even makes sense. I would love to hear your opinions on this.

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  • How many LOC/day "top" (google, MS, FB) engeneers produce? [closed]

    - by NoSenseEtAl
    I know that 25 lines of lock free code is harder to do than 1000 lines of On_Click()... code but I wonder does anybody know in general what is the productivity of the average programmer in top tech companies. Motivation: I often go ??? mode when I see how low LoC/ day i produce(Im new to the my current language and Im part of the big project, but still..) and I would like to know how bad I am. :) If you are gonna warn me that LoC is a terrible measure I agree, but it is most exact one in a sense that I cant go and write 0.01% of Chrome or IE and say it took me this long so....

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  • Une fausse mise à jour d'Android menace les smartphones, Symantec l'a repérée sur un app store chinois

    Une fausse mise à jour d'Android menace les smartphones, Symantec l'a repérée sur un app store chinois Mise à jour du 10.03.2011 par Katleen Symantec vient d'émettre un bulletin d'alerte à propos d'une fausse mise à jour d'Android, qui se révèle en fait être malicieuse et le fruit du travail de hackers. Trompeuse, elle se nomme "Android Market Security Tool" (comme l'application légitime) et semble être basée sur un projet hébergé par Google Code et sous licence Apache. Une fois en place, elle envoie des SMS à un serveur command-and-control. Peu d'autres informations sont actuellement disponibles sur le sujet, puisque Symantec est toujours en train d'analyser le code m...

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  • MMORPG Server architecture: How to handle player input (messages/packets) while the server has to update many other things at the same time?

    - by Renann
    Yes, the question is is very difficult. This is more or less like what I'm thinking up to now: while(true) { if (hasMessage) { handleTheMessage(); } } But while I'm receiving the player's input, I also have objects that need to be updated or, of course, monsters walking (which need to have their locations updated on the game client everytime), among other things. What should I do? Make a thread to handle things that can't be stopped no matter what? Code an "else" in the infinity loop where I update the other things when I don't have player's input to handle? Or even: should I only update the things that at least one player can see? These are just suggestions... I'm really confused about it. If there's a book that covers these things, I'd like to know. It's not that important, but I'm using the Lidgren lib, C# and XNA to code both server and client. Thanks in advance.

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  • How can I add a character and enemies to a game that uses Parallax Scrolling? [on hold]

    - by Homer_Simpson
    I use the following code to create Parallax Scrolling: http://www.david-gouveia.com/portfolio/2d-camera-with-parallax-scrolling-in-xna/ Parallax Scrolling is working but I don't know how to add the player and the enemies. I tried to add a player class to the existing code, but if the player moves, then the camera isn't pointing at the player. The player leaves the camera viewport after a few seconds. I use the following code(as described in the tutorial), but it's not working: // Updates my camera to lock on the character _camera.LookAt(player.Playerposition); What can I do so that the player is always the center of the camera? How should I add the character and the enemies to the game? Should I create a layer for the character and the enemies? For example: new Layer(_camera) { Parallax = new Vector2(0.9f, 1.0f) } At the moment, I don't use a layer for the player and I don't have implemented the enemies because I don't know how to do that. My player class: public class Player { Texture2D Playertex; public Vector2 Playerposition = new Vector2(400, 240); private Game1 game1; public Player(Game1 game) { game1 = game; } public void Load(ContentManager content) { Playertex = content.Load<Texture2D>("8bitmario"); TouchPanel.EnabledGestures = GestureType.HorizontalDrag; } public void Update(GameTime gameTime) { while (TouchPanel.IsGestureAvailable) { GestureSample gs = TouchPanel.ReadGesture(); switch (gs.GestureType) { case GestureType.HorizontalDrag: Playerposition.X += 3f; break; } } } public void Render(SpriteBatch batch) { batch.Draw(Playertex, new Vector2(Playerposition.X - Playertex.Width / 2, Playerposition.Y - Playertex.Height / 2), Color.White); } } In Game1, I update the player and camera class: protected override void Update(GameTime gameTime) { // Updates my character's position player.Update(gameTime); // Updates my camera to lock on the character _camera.LookAt(player.Playerposition); base.Update(gameTime); } protected override void Draw(GameTime gameTime) { GraphicsDevice.Clear(Color.CornflowerBlue); foreach (Layer layer in _layers) layer.Draw(spriteBatch); spriteBatch.Begin(SpriteSortMode.Deferred, null, null, null, null, null, _camera.GetViewMatrix(new Vector2(0.0f, 0.0f))); player.Render(spriteBatch); spriteBatch.End(); base.Draw(gameTime); }

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  • I know Python, but I don't know how the hell I'm supposed to make my program do stuff [on hold]

    - by Relentless Pursuit
    Look, I know how to operate sets, open files, create algorithms, optimize my code, use for loops, while loops, etc btu I don't know how to do anything USEFUL NO BOOK HAS TAUGHT ME HOW TO BE USEFUL. ALL MY PROGRAMS ARE NOTHING BUT LINES OF PYTHON / C++ CODE WITH NO GUI, NO FUNCTIONALITY . nothing :( Is their some sort of secret? How do I go from command line interface, to actual GUI applications that can do useful stuff, I've heard the term being thrown around alot 'api' does that api have anything to do with this? ~A frustrated programmer

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  • What is the best way to maintain our programming experiences? [closed]

    - by M3HD1
    Possible Duplicate: how do you remember programming related stuff? During my work experiences, I always met many kind of blocking problems with different technologies. When I remember the efforts I spent to find the solutions I become frustrated and want to find a way to keep all in mind. Generally I keep all the project I made in my Hard Drive, and I usually reuse them when I encounter a problem i already encountered. But this is not to really efficient when you reopen your own code and say: Who is the sucker who wrote this code!? I'm thinking to make my own website in which I can post some tutorials / articles about the problems I met and their solutions. So I keep all in mind and help community. Do you think that it will be a good idea or just a loss of time regarding the actual programming forums?

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  • What is the proper way to use string::find to look for a word? [migrated]

    - by RubyKing
    How would I look through a string for a word rather then each character in that word. I have my code here and it always seems to find everything that is .obj even if its o or b or j or "." I checked the docuementation here but was unable to find an answer. Here is my code: string &str = *it; if(it->find(".obj")) { cout << "Found .Obj" << endl; } I also tried to use string::compare but that failed.

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  • What IDE(s) or editor(s) do companies like Google, Apple, IBM, etc. use?

    - by Pius
    Even though I have quite some experience in using various tools, I still can't make up my mind whether I prefer using IDE or a simple editor for code editing. Most IDEs I have experienced are written in Java (like Eclipse) which makes them slow and bulky. What's good about them is that it provides lots of tools. On the other hand editors are usually VERY fast. They can also be extended to become more similar to IDEs but usually I don't do that. However, there is Sublime Text 2 which has some basic code completion built-in. My question would be whether most Enterprise companies like Google, Apple, IBM and etc (except Microsoft because they have AMAZING IDE which, I assume, is used by MS developers) force their workers to use IDEs and whether using plain editor with external tools is considered being not professional? P.S. Not talking about cases like Android development where working without IDE barely possible.

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  • Convert project without introducing bugs

    - by didietexas
    I have the C++ code of a exe which contains a UI and some process. My goal is to remove the UI so that I only have the process and to convert the exe into a dll. In order to do that, I am thinking of generating unit test before touching any code and then to do my modification and make sure the tests are not failing. The problem is that I am not sure if this is the best approach and if it is, is there a way to automatically generate unit test. BTW, I am using VS 2012. Do you have any guidance for me?

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