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• How to understand such C macro expansion

  - by upton

  A macro definition: #define HTTP_ERRNO_MAP(XX) \ /* No error */ \ XX(OK, "success") \ \ /* Callback-related errors */ …

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• Python - How can I make this code asynchronous?

  - by dave

  Here's some code that illustrates my problem: def blocking1(): while True: yield 'first blocking function example' def blocking2(): while True: yield 'second blocking function example' for i in blocking1(): print 'this will be shown' for i in blocking2(): print 'this will not be shown' I have two functions…

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• Demystifying Silverlight Dependency Properties

  - by dwahlin

  I have the opportunity to teach a lot of people about Silverlight (amongst other technologies) and one of the topics that definitely confuses people initially is the concept of dependency properties. I confess that when I first heard about them my initial thought was “Why do we need a specialized type of property?” While you can certainly use…

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• Generating a twitter OAuth access key - the semi-manual way

  - by Piet

  [UPDATE] Apparently someone at Twitter was listening, or I’m going senile/blind. Let’s call it a combination of both. Instead of following all the steps below, you could just login with the Twitter account you want to use on http://dev.twitter.com, register your application and then click ‘Edit Details’ on the application overview page at…

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• How do I check user's unlocked achievement and leaderboard scores via GPG plugin

  - by noob

  I need to load user's achievement and their scores from leaderboard in my game. But the Social.LoadScore() and Social.LoadAchievements() both returns a 0 size array in callback. When I checked the implementation in Google Play Gaming's PlayGamePlatform.cs, both the method has this summary - Not implemented yet. Calls the callback with…

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• Bullet Physics - Casting a ray straight down from a rigid body (first person camera)

  - by Hydrocity

  I've implemented a first person camera using Bullet--it's a rigid body with a capsule shape. I've only been using Bullet for a few days and physics engines are new to me. I use btRigidBody::setLinearVelocity() to move it and it collides perfectly with the world. The only problem is the Y-value moves freely, which I temporarily solved by…

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• What's the best way to start up a opengl context in my setup?

  - by NoobScratcher

  Would it be better to create a callback function which contains a OpenGL 3.0+ Context including viewport, matrix, etc or setup OpenGL in a function called GL_StartUp and use that GL_StartUp Function in the mainloop and callback function to that Function. I want my program to only show a OpenGL default scene when the user clicks on the…

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• Windows Azure Drives: Part 1: Configure and Mounting at Startup of Web Role Lifecycle

  An approach for providing Windows Azure Drives (a.k.a. XDrive) to any cloud-based web applications through RoleEntryPoint callback methods and exposing successful mounting results within an environment variable through Global.asax callback method derived from the HttpApplication base class.

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• Windows Azure Drives: Part 1: Configure and Mounting at Startup of Web Role Lifecycle

  An approach for providing Windows Azure Drives (a.k.a. XDrive) to any cloud-based web applications through RoleEntryPoint callback methods and exposing successful mounting results within an environment variable through Global.asax callback method derived from the HttpApplication base class.

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• Parallelism in .NET – Part 17, Think Continuations, not Callbacks

  - by Reed

  In traditional asynchronous programming, we’d often use a callback to handle notification of a background task’s completion.  The Task class in the Task Parallel Library introduces a cleaner alternative to the traditional callback: continuation tasks. Asynchronous programming methods typically required callback functions. …

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• Anti-Forgery Request in ASP.NET MVC and AJAX

  - by Dixin

  Background To secure websites from cross-site request forgery (CSRF, or XSRF) attack, ASP.NET MVC provides an excellent mechanism: The server prints tokens to cookie and inside the form; When the form is submitted to server, token in cookie and token inside the form are sent by the HTTP request; Server validates the tokens. To…

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• Drupal Ctools Form Wizard in a Block

  - by Iamjon

  Hi everyone I created a custom module that has a Ctools multi step form. It's basically a copy of http://www.nicklewis.org/using-chaos-tools-form-wizard-build-multistep-forms-drupal-6. The form works. I can see it if I got to the url i made for it. For the life of me I can't get the multistep form to show up in a block. Any…

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• Ajax call in a jQuery plugin not working properly

  - by Saneef

  I'm trying to create a jQuery plugin, inside I need to do an AJAX call to load an xml. jQuery.fn.imagetags = function(options) { s = jQuery.extend({ height:null, width:null, url:false, callback:null, title:null, }, options); return this.each(function(){ obj = $(this); //Initialising…

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• Darwin Streaming Server Interval Role

  - by Asmv9

  I want to use the Interval Role in Darwin streaming server,more specifically i want to call the QTSS_SetIntervalRoleTimer() when the server starts streaming a video file.But i have problem in doing this as from what it seems,the method returns QTSS_Err when i do that. I believe that the problem is due to the fact that the…

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• How do I catch this WPF Bitmap loading exception?

  - by mmr

  I'm developing an application that loads bitmaps off of the web using .NET 3.5 sp1 and C#. The loading code looks like: try { CurrentImage = pics[unChosenPics[index]]; bi = new BitmapImage(CurrentImage.URI); // BitmapImage.UriSource must be in a BeginInit/EndInit block. …

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• How to associate newly created SurfaceHolder to MediaPlayer

  - by fayerth

  In my code, I want to be able to temporarily hide (and subsequently show) a video. I am using a SurfaceView + MediaPlayer combination instead of the VideoView due to requirements. However, I am facing difficulties in getting video playback to occur as expected after I show the SurfaceView. My code excerpts includes the…

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• Creating a JSONP Formatter for ASP.NET Web API

  - by Rick Strahl

  Out of the box ASP.NET WebAPI does not include a JSONP formatter, but it's actually very easy to create a custom formatter that implements this functionality. JSONP is one way to allow Browser based JavaScript client applications to bypass cross-site scripting limitations and serve data from the non-current Web server.…

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• Error instantiating Texture2D in MonoGame for Windows 8 Metro Apps

  - by JimmyBoh

  I have an game which builds for WindowsGL and Windows8. The WindowsGL works fine, but the Windows8 build throws an error when trying to instantiate a new Texture2D. The Code: var texture = new Texture2D(CurrentGame.SpriteBatch.GraphicsDevice, width, 1); // Error thrown here...…

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• Object oriented wrapper around a dll

  - by Tom Davies

  So, I'm writing a C# managed wrapper around a native dll. The dll contains several hundred functions. In most cases, the first argument to each function is an opaque handle to a type internal to the dll. So, an obvious starting point for defining some classes in the wrapper…

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• Testing a codebase with sequential cohesion

  - by iveqy

  I've this really simple program written in C with ncurses that's basically a front-end to sqlite3. I would like to implement TDD to continue the development and have found a nice C unit framework for this. However I'm totally stuck on how to implement it. Take this case…

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• jquery ajax error cannot find url outside of debug mode

  - by John Orlandella Jr.

  I inherited some code two weeks ago that is using the jquery.ajax method to connect to a .NET web service. Here is the piece of code give me the trouble... if (MSCTour.AppSettings.OFFLINE !== 'TRUE') { $.ajax({ url: url, data: json, …

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• how to get $form_state outside of FAPI's functions?

  - by logii

  I'm writing a custom module and I'd like to use $form_state of the current form in another non-form api function - custom_facet_view_build(). any help is appreciated :) <?php /** * Implementation of hook_perm(). */ function custom_facet_perm() { return array( …

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• Handling WCF Service Paths in Silverlight 4 – Relative Path Support

  - by dwahlin

  If you’re building Silverlight applications that consume data then you’re probably making calls to Web Services. We’ve been successfully using WCF along with Silverlight for several client Line of Business (LOB) applications and passing a lot of data back and forth. Due…

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• Non-blocking I/O using Servlet 3.1: Scalable applications using Java EE 7 (TOTD #188)

  - by arungupta

  Servlet 3.0 allowed asynchronous request processing but only traditional I/O was permitted. This can restrict scalability of your applications. In a typical application, ServletInputStream is read in a while loop. public class TestServlet extends HttpServlet…

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• Dynamically load and call delegates based on source data

  - by makerofthings7

  Assume I have a stream of records that need to have some computation. Records will have a combination of these functions run Sum, Aggregate, Sum over the last 90 seconds, or ignore. A data record looks like this: Date;Data;ID Question Assuming that…

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