Tutorial by Examples: f

If for some reason using the Symfony Installer is not an option, you can also create a new project using Composer. First of all, make sure you have installed Composer. Next, you can use the create-project command to create a new project: composer create-project symfony/framework-standard-edition m...

List of available mixins: ListModelMixin: provides a .list() method to the view/viewset RetrieveModelMixin: provides a .retrieve() method to the view/viewset CreateModelMixin: provides a .create() method to the view/viewset UpdateModelMixin: provides a .update() method to the view/viewset D...

After creating a new Symfony application, you can use the server:run command to start a simple PHP web server, so you can access your new application from your web browser: cd my_project_name/ php bin/console server:run You can now visit http://localhost:8000/ to see the Symfony welcome page. ...

When a window contains many widgets, they might not all be visible. However, neither a window (Tk or Toplevel instance) nor a Frame are scrollable. One solution to make the window content scrollable is to put all the widgets in a Frame, and then, embed this Frame in a Canvas using the create_window ...

If you want to have a placeholder that may be omitted, you can give it a default value: Using YAML: # app/config/routing.yml blog_list: path: /blog/{page} defaults: { _controller: AppBundle:Blog:list, page: 1 } requirements: page: '\d+' Using Annotations: // src/...

Sometimes you want to return a 404 (Not Found) response, because the requested resource does not exist. Symfony allows you to do so by throwing a NotFoundHttpException. The Symfony base Controller exposes a createNotFoundException method which creates the exception for you: public function indexAc...

If you need to access the Request object (for instance to read the query parameters, to read an HTTP header or to process an uploaded file), you can receive the request as a method argument by adding a type-hinted argument: use Symfony\Component\HttpFoundation\Request; public function indexActio...

Now we need to access the text of the tweets. So we do it in this way (we also need to clean up the tweets from special characters that for now we don't need, like emoticons with the sapply function.) coffee_tweets = sapply(c_tweets, function(t) t$getText()) coffee_tweets <- sapply(coffee_t...

It's really easy to define the functions. Function GetAreaOfARectangle(ByVal Edge1 As Integer, ByVal Edge2 As Integer) As Integer Return Edge1 * Edge2 End Function Dim Area As Integer = GetAreaOfARectangle(5, 8) Console.Writeline(Area) 'Output: 40

Function Age(ByVal YourAge As Integer) As String Select Case YourAge Case Is < 18 Return("You are younger than 18! You are teen!") Case 18 to 64 Return("You are older than 18 but younger than 65! You are adult!") Cas...

libavformat usually takes in a file name and reads media directly from the filesystem. If you want to read from memory (such as streams), do the following: // Define your buffer size const int FILESTREAMBUFFERSZ = 8192; // A IStream - you choose where it comes from IStream* fileStreamData; ...

Opening a media file from the local file system. AVFormatContext *formatContext; // Open the file if(avformat_open_file(&formatContext, "path/to/file.ogg", NULL, NULL) < 0){ // Error opening file } // Do something with the file // Free resources avformat_close_inpu...

Formats contain one or more encoded and muxed streams. We usually read these in chunks, which are often called frames (though in certain cases, FFmpeg refers exclusively to decoded, raw media chunks as frames, and encoded chunks as packets, which may be confusing). To read a single frame from a form...

The API call avio_alloc_context, which sets up a custom IO context, takes in a pointer to a Read function. If you are reading from an IStream, you can use the following: /** * Reads from an IStream into FFmpeg. * * @param ptr A pointer to the user-defined IO data structure. * @param b...

Media stream containers usually have a several streams, such as a video stream and an audio stream. For example, you can get the audio stream using the following: // A Format Context - see Reading Data for more info AVFormatContext *formatContext; // Inspect packets of stream to determine prope...

Given a codec context and encoded packets from a media stream, you can start decoding media into raw frames. To decode a single frame, you can use the following code: // A codec context, and some encoded data packet from a stream/file, given. AVCodecContext *codecContext; // See Open a codec cont...

You can use UILocalNotification, old APIs also works fine with iOS10, but we had better use the APIs in the User Notifications framework instead. There are also some new features, you can only use with iOS10 User Notifications framework. This also happens to Remote Notification, for more informatio...

In this XML file, we are specifying the servlet class DispatcherServlet that acts as the front controller in Spring Web MVC. All the incoming request for the HTML file will be forwarded to the DispatcherServlet. <?xml version="1.0" encoding="UTF-8"?> <web-app version...

Imagine that you need sort records by lowest value of either one of two columns. Some databases could use a non-aggregated MIN() or LEAST() function for this (... ORDER BY MIN(Date1, Date2)), but in standard SQL, you have to use a CASE expression. The CASE expression in the query below looks at th...

AxWindowsMediaPlayer1.URL = "C:\My Files\Movies\Avatar.mp4" AxWindowsMediaPlayer1.Ctlcontrols.play() This code will play Avatar in the axWindowsMediaPlayer.