Tutorial by Examples: r

When throw occurs in an expression with an operand, its effect is to throw an exception, which is a copy of the operand. void print_asterisks(int count) { if (count < 0) { throw std::invalid_argument("count cannot be negative!"); } while (count--) { putchar(...

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...

Detailed instructions on getting kettle set up or installed.

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...

Python3 - sudo pip3 install tornado Python2 - sudo pip install tornado Packages which will are optional but recommended to install alongside Tornado : concurrent.futures pycurl pycares Twisted monotonic or monotime

#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...

C99 Since C99 the C library has a set of safe conversion functions that interpret a string as a number. Their names are of the form strtoX, where X is one of l, ul, d, etc to determine the target type of the conversion double strtod(char const* p, char** endptr); long double strtold(char const* p...

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...

The keyword try is followed by a block, or by a constructor initializer list and then a block (see here). The try block is followed by one or more catch blocks. If an exception propagates out of the try block, each of the corresponding catch blocks after the try block has the opportunity to handle t...

Here is a very simple example to illustrate how to write a NIF. Directory structure: nif_test ├── c_src │   ├── Makefile │   └── nif_test.c ├── rebar.config └── src ├── nif_test.app.src └── nif_test.erl This structure can be easily initialized using Rebar3: $ rebar3 new lib nif_...

Official documentation: http://erlang.org/doc/man/erl_nif.html The most important structs, types and macros of the Erlang C API are the following: ERL_NIF_TERM: the type for Erlang terms. This is the return type that NIF functions must follow. ERL_NIF_INIT(MODULE, ErlNifFunc funcs[], load, relo...

Website: http://www.syntevo.com/smartgit/ Price: Free for non-commercial use only. A perpetual license costs 99 USD Platforms: Linux, OS X, Windows Developed by: syntevo

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 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...

An anonymous inner class is a form of inner class that is declared and instantiated with a single statement. As a consequence, there is no name for the class that can be used elsewhere in the program; i.e. it is anonymous. Anonymous classes are typically used in situations where you need to be abl...

A class written within a method called method local inner class. In that case the scope of the inner class is restricted within the method. A method-local inner class can be instantiated only within the method where the inner class is defined. The example of using method local inner class: public...