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  • Naming convention for iOS

    - by RMDan
    I am learning Objective-C and iOS development and not sure what proper naming convention should be used. I understand how to use the label aspect of Obj-C methods but not the proper way to name each label. What is the best practice for naming methods, properties, objects, outlets, and actions? Also, Should different naming conventions be used between Obj-C code and C code? And if so what differences is there?

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  • How do you make a bullet ricochet off a vertical wall?

    - by Bagofsheep
    First things first. I am using C# with XNA. My game is top-down and the player can shoot bullets. I've managed to get the bullets to ricochet correctly off horizontal walls. Yet, despite using similar methods (e.g. http://stackoverflow.com/questions/3203952/mirroring-an-angle) and reading other answered questions about this subject I have not been able to get the bullets to ricochet off a vertical wall correctly. Any method I've tried has failed and sometimes made ricocheting off a horizontal wall buggy. Here is the collision code that calls the ricochet method: //Loop through returned tile rectangles from quad tree to test for wall collision. If a collision occurs perform collision logic. for (int r = 0; r < returnObjects.Count; r++) if (Bullets[i].BoundingRectangle.Intersects(returnObjects[r])) Bullets[i].doCollision(returnObjects[r]); Now here is the code for the doCollision method. public void doCollision(Rectangle surface) { if (Ricochet) doRicochet(surface); else Trash = true; } Finally, here is the code for the doRicochet method. public void doRicochet(Rectangle surface) { if (Position.X > surface.Left && Position.X < surface.Right) { //Mirror the bullet's angle. Rotation = -1 * Rotation; //Moves the bullet in the direction of its rotation by given amount. moveFaceDirection(Sprite.Width * BulletScale.X); } else if (Position.Y > surface.Top && Position.Y < surface.Bottom) { } } Since I am only dealing with vertical and horizontal walls at the moment, the if statements simply determine if the object is colliding from the right or left, or from the top or bottom. If the object's X position is within the boundaries of the tile's X boundaries (left and right sides), it must be colliding from the top, and vice verse. As you can see, the else if statement is empty and is where the correct code needs to go.

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  • Apps Script Office Hours - November 14, 2012

    Apps Script Office Hours - November 14, 2012 In this episode Eric ... - Covers the release notes from November 13, 2012 - Talks about a new feature that allows you to set a custom verified URL for your Apps Script web apps in the Chrome Web Store. - Answers a question about OAuth 2. The schedule of future episodes can be found at: developers.google.com From: GoogleDevelopers Views: 208 10 ratings Time: 11:38 More in Science & Technology

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  • RadioButtons and Lambda Expressions

    - by MightyZot
    Radio buttons operate in groups. They are used to present mutually exclusive lists of options. Since I started programming in Windows 20 years ago, I have always been frustrated about how they are implemented. To make them operate as a group, you put your radio buttons in a group box. Conversely, to group radio buttons in HTML, you simply give them all the same name. Radio buttons with the same name or ID in HTML operate as one mutually exclusive group of options. In C#, all your radio buttons must have unique names and you use group boxes to group them. I’m in the process of converting some old code to C# and I’m tasked with creating a user control with groups of radio buttons on it. I started out writing the traditional switch…case statements to check the appropriate radio button based upon value, loops to uncheck them all, etc. Then it occurred to me that I could stick the radio buttons in a Dictionary or List and use Lambda expressions to make my code a lot more maintainable. So, here is what I ended up with: Here is a dictionary that contains my list of radio buttons and their values. I used their values as the keys, so that I can select them by value. Now, instead of using loops and switch…case statements to control the radio buttons, I use the lambda syntax and extension methods. Selecting a Radio Button by Value This code is inside of a property accessor, so “value” represents the value passed into the property accessor. The “First” extension method uses the delegate represented by the lambda expression to select the radio button (actually KeyValuePair) that represents the passed in value. Finally, the resulting checkbox is checked. Since the radio buttons are in the same group, they function as a group, the appropriate radio button is selected while the others are unselected. Reading the Value This is the get accessor for the property that returns the value of the checked radio button. Now, if you’re using binding, this code is likely not necessary; however, I didn’t want to use binding in this case, so I think this is a good alternative to the traditional loops and switch…case statements.

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  • Does Your Browser Behave?

    Last June, we launched the Sputnik JavaScript conformance test suite, a comprehensive set of more than 5000 tests. Today we're releasing a test runner for Sputnik, that allows...

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  • Sécurité : deux millions de mots de passe WordPress réinitialisés suite à la découverte de contributions malicieuses à trois plug-ins populaires

    Sécurité : deux millions de mots de passe WordPress réinitialisés Suite à la découverte de contributions malicieuses à trois plug-ins populaires Automatic vient de lancer une dépêche de sécurité importante sur le blog officiel de WordPress, y notifiant tous les utilisateurs du Blogware/CMS de la découverte de plusieurs contributions malintentionnées au code de trois de ses plug-ins les plus populaires. Des commits acceptés sur le code de AddThis, WPtouch, et W3 Total Cache, se révèlent contenir des portes dérobées soigneusement dissimulées, créées et propagées par un ou plusieurs pirates non encore identifiés. Automatic assure que les contributions malicieuses ne pr...

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  • PyPy 1.2 Released

    PyPy is a reimplementation of Python in Python, using advanced techniques to try to attain better performance than CPython . Many years of hard work have finally paid...

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  • Chapter 3: JavaFX Primer3

    JavaFX Script blends declarative programming concepts with object orientation. This provides a highly productive, yet flexible and robust, foundation for applications. However, with this flexibility comes responsibility from the developer.

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