Tutorial by Examples: d

A pointer to member of derived class can be converted to a pointer to member of base class using static_cast. The types pointed to must match. If the operand is a null pointer to member value, the result is also a null pointer to member value. Otherwise, the conversion is only valid if the member ...

In C++, void* cannot be implicitly converted to T* where T is an object type. Instead, static_cast should be used to perform the conversion explicitly. If the operand actually points to a T object, the result points to that object. Otherwise, the result is unspecified. C++11 Even if the operand do...

Generally execute() command is used for fire and forget calls (without need of analyzing the result) and submit() command is used for analyzing the result of Future object. We should be aware of key difference of Exception Handling mechanisms between these two commands. Exceptions from submit() ar...

C++14 C++14 introduced a standard way of deprecating functions via attributes. [[deprecated]] can be used to indicate that a function is deprecated. [[deprecated("reason")]] allows adding a specific reason which can be shown by the compiler. void function(std::unique_ptr<A> &&a...

Thread-local storage can be created using the thread_local keyword. A variable declared with the thread_local specifier is said to have thread storage duration. Each thread in a program has its own copy of each thread-local variable. A thread-local variable with function (local) scope will be in...

Creates a path from a set of points [{x:?,y:?},{x:?,y:?},...,{x:?,y:?}] with rounded corners of radius. If the corner angle is too small to fit the radius or the distance between corners does not allow room the corners radius is reduced to a best fit. Usage Example var triangle = [ { x: 200...

First, add the HTML File to your Project (If you are asked to choose options for adding the file, select Copy items if needed) The following line of code loads the content of the HTML file into the webView webView.loadRequest(NSURLRequest(URL: NSURL(fileURLWithPath: NSBundle.mainBundle().pathForRe...

Members of objects or classes can be accessed using the object operator (->) and the class operator (::). class MyClass { public $a = 1; public static $b = 2; const C = 3; public function d() { return 4; } public static function e() { return 5; } } $object = new MyCl...

Images and files can be uploaded/submitted to server by setting enctype attribute of form tag to multipart/form-data. enctype specifies how form data would be encoded while submitting to the server. Example <form method="post" enctype="multipart/form-data" action="uplo...

#include <iostream> #include <string> int main() { const char * C_String = "This is a line of text w"; const char * C_Problem_String = "This is a line of text ኚ"; std::string Std_String("This is a second line of text w"); std::string...

display: inline-block; The display property with the value of inline-block is not supported by Internet Explorer 6 and 7. A work-around for this is: zoom: 1; *display: inline; The zoom property triggers the hasLayout feature of elements, and it is available only in Internet Explorer. The *di...

What is .postMessage(), when and why do we use it .postMessage() method is a way to safely allow communication between cross-origin scripts. Normally, two different pages, can only directly communicate with each other using JavaScript when they are under the same origin, even if one of them is emb...

Official documentation: http://erlang.org/doc/tutorial/nif.html NIFs were introduced in Erlang/OTP R13B03 as an experimental feature. The purpose is to allow calling C-code from inside Erlang code. NIFs are implemented in C instead of Erlang, but they appear as any other functions in the scope of ...

var client = new AmazonDynamoDBClient(); Table booksTable = Table.LoadTable(client, "Books"); // Store item Document book = new Document(); book["Title"] = "Cryptonomicon"; book["Id"] = 42; book["Authors"] = new List<string> { "Ne...

This example consists of two parts: first, we must define our Book type; second, we use it with DynamoDBContext. [DynamoDBTable("Books")] class Book { [DynamoDBHashKey] public int Id { get; set; } public string Title { get; set; } public List<string> Authors { ...

The Collections class provides a way to make a list unmodifiable: List<String> ls = new ArrayList<String>(); List<String> unmodifiableList = Collections.unmodifiableList(ls); If you want an unmodifiable list with one item you can use: List<String> unmodifiableList = Col...

The Collections class allows for you to move objects around in the list using various methods (ls is the List): Reversing a list: Collections.reverse(ls); Rotating positions of elements in a list The rotate method requires an integer argument. This is how many spots to move it along the line b...

Comparator.comparing(Person::getName) This creates a comparator for the class Person that uses this person name as the comparison source. Also it is possible to use method version to compare long, int and double. For example: Comparator.comparingInt(Person::getAge) Reversed order To create ...

Suppose we have a component which will hide at a certain window width. import { Component } from '@angular/core'; @Component({ ... template: ` <div> <p [hidden]="!visible" (window:resize)="onResize($event)" >Now you see me...</p> &lt...

Starting with Java 8, you can use lambda expressions & predicates. Example: Use a lambda expressions & a predicate to get a certain value from a list. In this example every person will be printed out with the fact if they are 18 and older or not. Person Class: public class Person { p...