Tutorial by Examples: d

There are two common conventions for private fields: camelCase and _camelCaseWithLeadingUnderscore. Camel case public class Rational { private readonly int numerator; private readonly int denominator; public Rational(int numerator, int denominator) { // "this&q...

We can use the Service Container as a Dependency Injection Container by binding the creation process of objects with their dependencies in one point of the application Let's suppose that the creation of a PdfCreator needs two objects as dependencies; every time we need to build an instance of PdfCr...

Consider the following example assuming that you have a ';'-delimited CSV to load into your database. 1;max;male;manager;12-7-1985 2;jack;male;executive;21-8-1990 . . . 1000000;marta;female;accountant;15-6-1992 Create the table for insertion. CREATE TABLE `employee` ( `id` INT NOT NULL , ...

Break and continue statements can be followed by an optional label which works like some kind of a goto statement, resumes execution from the label referenced position for(var i = 0; i < 5; i++){ nextLoop2Iteration: for(var j = 0; j < 5; j++){ if(i == j) break nextLoop2Iteration; ...

/// <summary> /// Gets displayName from DataAnnotations attribute /// </summary> /// <typeparam name="TModel"></typeparam> /// <typeparam name="TProperty"></typeparam> /// <param name="htmlHelper"></param> /// <pa...

/// <summary> /// Creates simple button /// </summary> /// <param name="poHelper"></param> /// <param name="psValue"></param> /// <returns></returns> public static MvcHtmlString SubmitButton(this HtmlHelper poHelper, string ps...

Angular has reputation for having awesome bidirectional data binding. By default, Angular continuously synchronizes values bound between model and view components any time data changes in either the model or view component. This comes with a cost of being a bit slow if used too much. This will hav...

AngularJS has digest loop and all your functions in a view and filters are executed every time the digest cycle is run. The digest loop will be executed whenever the model is updated and it can slow down your app (filter can be hit multiple times, before the page is loaded). You should avoid this: ...

NSURL *url = [NSURL URLWithString:@"http://www.example.com/"]; NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration]; // Configure the session here. NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration]; [[s...

// create an empty set var mySet = new SortedSet<int>(); // add something // note that we add 2 before we add 1 mySet.Add(2); mySet.Add(1); // enumerate through the set foreach(var item in mySet) { Console.WriteLine(item); } // output: // 1 // 2

Each domain supported in the app needs to make available its own apple-app-site-association file. If the content served by each domain is different, then the contents of the file will also change to support the respective paths. Otherwise, the same file can be used, but it needs to be accessible at ...

Mage::log('My log entry'); Mage::log('My log message: '.$myVariable); Mage::log($myArray); Mage::log($myObject); This will log to /var/log/system.log Objects and Arrays are automatically written via a print_r() directive. Watch out when using objects since these can get substantial in size. ...

A common usecase for the ready() hook is to access the DOM, e.g. to initiate a Javascript plugin, get the dimensions of an element etc. The problem Due to Vue's asynchronous DOM update mechanism, it's not guaranteed that the DOM has been fully updated when the ready() hook is called. This usually ...

do-while loop first executes a block of code once, in every case, then iterates through that block of code as long as a specified condition is true. $i = 0; do { $i++; echo $i; } while ($i < 10); Output: `12345678910` For detailed information, see the Loops topic.

declare is used to set an execution directive for a block of code. The following directives are recognized: ticks encoding strict_types For instance, set ticks to 1: declare(ticks=1); To enable strict type mode, the declare statement is used with the strict_types declaration: declare(s...

require require is similar to include, except that it will produce a fatal E_COMPILE_ERROR level error on failure. When the require fails, it will halt the script. When the include fails, it will not halt the script and only emit E_WARNING. require 'file.php'; PHP Manual - Control Structures - ...

In this example we show how to generate a simple sine wave, and output it on the user's speakers/headphones. let audioContext = new (window.AudioContext || window.webkitAudioContext)(); let sourceNode = audioContext.createOscillator(); sourceNode.type = 'sine'; sourceNode.frequency.value = 261...

Effects can be applied to audio by chaining nodes between the source and the destination node. In this example we use a gain node to mute the source, and only let sound through at specific times. This allows us to create morse code. function morse(gainNode, pattern) { let silenceTimeout = 300; ...

Assuming we want to modify bit n of an integer primitive, i (byte, short, char, int, or long): (i & 1 << n) != 0 // checks bit 'n' i |= 1 << n; // sets bit 'n' to 1 i &= ~(1 << n); // sets bit 'n' to 0 i ^= 1 << n; // toggles the value of bit 'n' Us...

You must be very careful when providing a forwarding reference overload as it may match too well: struct A { A() = default; // #1 A(A const& ) = default; // #2 template <class T> A(T&& ); // #3 }; The intent here was that A is c...