Tutorial by Examples: d

The var keyword allows a programmer to implicitly type a variable at compile time. var declarations have the same type as explicitly declared variables. var squaredNumber = 10 * 10; var squaredNumberDouble = 10.0 * 10.0; var builder = new StringBuilder(); var anonymousObject = new { One =...

This code is to add and remove a value from a flagged enum-instance: [Flags] public enum MyEnum { Flag1 = 1 << 0, Flag2 = 1 << 1, Flag3 = 1 << 2 } var value = MyEnum.Flag1; // set additional value value |= MyEnum.Flag2; //value is now Flag1, Flag2 value...

Elm Reactor is the essential tool for prototyping your application. Please note, that you will not be able to compile Main.elm with Elm Reactor, if you are using Http.App.programWithFlags or Ports Running elm-reactor in a projects directory will start a web server with a project explorer, that all...

To create a XML using DOMDocument,basically, we need to create all the tags and attributes using the createElement() and createAttribute() methods and them create the XML structure with the appendChild(). The example below includes tags, attributes, a CDATA section and a different namespace for the...

Xdebug is a PHP extension which provides debugging and profiling capabilities. It uses the DBGp debugging protocol. There are some nice features in this tool: stack traces on errors maximum nesting level protection and time tracking helpful replacement of standard var_dump() function for displ...

C++14 Those following string user literals are declared in the namespace std::literals::string_literals, where both literals and string_literals are inline namespaces. Access to these operators can be gained with using namespace std::literals, using namespace std::string_literals, and using namespa...

A default constructor is a type of constructor that requires no parameters when called. It is named after the type it constructs and is a member function of it (as all constructors are). class C{ int i; public: // the default constructor definition C() : i(0){ // member initial...

A destructor is a function without arguments that is called when a user-defined object is about to be destroyed. It is named after the type it destructs with a ~ prefix. class C{ int* is; string s; public: C() : is( new int[10] ){ } ~C(){ // destructor definition ...

See below for a simple example of how to use a BackgroundWorker object to perform time-intensive operations in a background thread. You need to: Define a worker method that does the time-intensive work and call it from an event handler for the DoWork event of a BackgroundWorker. Start the execu...

See below for a simple example of how to use a Thread to do some time intensive stuff in a background process. public async void ProcessDataAsync() { // Start the time intensive method Thread t = new Thread(TimeintensiveMethod); // Control returns here before TimeintensiveMethod r...

Subscripts can also be used with NSDictionary and NSMutableDictionary. The following code: NSMutableDictionary *myDictionary = [@{@"Foo": @"Bar"} mutableCopy]; [myDictionary setObject:@"Baz" forKey:@"Foo"]; NSLog(@"%@", [myDictionary objectForKey:...

the steps in this example will use the following project structure as a demonstration and we intend to export it to the "GHTuts" Repository [Note that the Repo doesn't exist yet on github] but leave the "SensitiveProject" without publish as it contains some passwords, keys, et...

C++14 Those following complex user literals are declared in the namespace std::literals::complex_literals, where both literals and complex_literals are inline namespaces. Access to these operators can be gained with using namespace std::literals, using namespace std::complex_literals, and using nam...

This is our buffer: void write_buffer(size_t size, char ** buffer) { char * buf = *buffer; size_t iter; for(iter = 0; iter < size; iter++) { putc(*(buf + iter)); } } The cursor is at [1][1] ([line][col]). Move the cursor to the curl bracket of the for loop...

The common idiom for loading shared library files in Java is the following : public class ClassWithNativeMethods { static { System.loadLibrary("Example"); } public native void someNativeMethod(String arg); ... Calls to System.loadLibrary are almost always...

Quite often you have a file which was edited within DOS or Windows and you are viewing it under UNIX. This can look like the following when you view the file with vi. First line of file^M Next Line^M And another^M If you wish to remove the ^M, it can be that you delete each ^M by hand. Alter...

Download and install the latest Eclipse IDE Install Eclipse one of two ways: Eclipse Installer Download the zip for your favorite package If you don't already have a preferred Eclipse package, Eclipse for JavaScript Developers is recommended Install SuiteCloud IDE plugin Once i...

All actions performed in a timer are handled in the "Tick" event. public partial class Form1 : Form { Timer myTimer = new Timer(); public Form1() { InitializeComponent(); myTimer.Tick += myTimer_Tick; //assign the event handler named "myT...

public partial class Form1 : Form { Timer myTimer = new Timer(); int timeLeft = 10; public Form1() { InitializeComponent(); //set properties for the Timer myTimer.Interval = 1000; myTimer.Enabled = tru...

Parse error: syntax error, unexpected end of file in C:\xampp\htdocs\stack\index.php on line 4 If you get an error like this (or sometimes unexpected $end, depending on PHP version), you will need to make sure that you've matched up all inverted commas, all parentheses, all curly braces, all brac...