Tutorial by Examples: r

import { Component } from '@angular/core'; @Component({ selector: 'my-app', template: ` <h1>Angular 2 App</h1> <p>Component is directive with template</p> ` }) export class AppComponent { }

<div *ngFor="let item of items">{{ item.description }}</div> <span *ngIf="isVisible"></span>

import {Directive, ElementRef, Renderer} from '@angular/core'; @Directive({ selector: '[green]', }) class GreenDirective { constructor(private _elementRef: ElementRef, private _renderer: Renderer) { _renderer.setElementStyle(_elementRef.nativeElement, 'color', 'gree...

By default, ui-router encodes the slash / inside parameters. If you want to send a path in the URL, you need to define a custom parameter type. Define: module.config(['$urlMatcherFactoryProvider', function($urlMatcherFactory) { $urlMatcherFactory.type('path', { decode: function(val) { retu...

A complete Fortran program is made up from a number of distinct program units. Program units are: main program function or subroutine subprogram module or submodule block data program unit The main program and some procedure (function or subroutine) subprograms may be provided by a languag...

An external procedure is one which is defined outside another program unit, or by a means other than Fortran. The function contained in a file like integer function f() implicit none end function f is an external function. For external procedures, their existence may be declared by using a...

Block data program units are program units which provide initial values for objects in common blocks. These are deliberately left undocumented here, and will feature in the documentation of historic Fortran features.

A program unit which is not an internal subprogram may contain other program units, called internal subprograms. program prog implicit none contains function f() end function f subroutine g() end subroutine g end program Such an internal subprogram has a number of features: t...

iex> ~w(a b c) ["a", "b", "c"]

From within a generator function, the control can be delegated to another generator function using yield*. function* g1() { yield 2; yield 3; yield 4; } function* g2() { yield 1; yield* g1(); yield 5; } var it = g2(); console.log(it.next()); // 1 console.log(it.next())...

The Observer pattern is used for event handling and delegation. A subject maintains a collection of observers. The subject then notifies these observers whenever an event occurs. If you've ever used addEventListener then you've utilized the Observer pattern. function Subject() { this.observers...

#include <stdio.h> #define ARRLEN (10) int main (void) { int n[ ARRLEN ]; /* n is an array of 10 integers */ size_t i, j; /* Use size_t to address memory, that is to index arrays, as its guaranteed to be wide enough to address all of the possible availab...

A distinctive syntactic peculiarity of C is that declarations mirror the use of the declared object as it would be in a normal expression. The following set of operators with identical precedence and associativity are reused in declarators, namely: the unary * "dereference" operator wh...

git diff HEAD^ HEAD This will show the changes between the previous commit and the current commit.

Freeing memory twice is undefined behavior, e.g. int * x = malloc(sizeof(int)); *x = 9; free(x); free(x); Quote from standard(7.20.3.2. The free function of C99 ): Otherwise, if the argument does not match a pointer earlier returned by the calloc, malloc, or realloc function, or if the sp...

Using an incorrect format specifier in the first argument to printf invokes undefined behavior. For example, the code below invokes undefined behavior: long z = 'B'; printf("%c\n", z); Here is another example printf("%f\n",0); Above line of code is undefined behavior. %...

These examples assume that you already know what Java 7's NIO is in general, and you are used to writing code using java.io.File. Use these examples as a means to quickly find more NIO-centric documentation for migrating. There is much more to Java 7's NIO such as memory-mapped files or opening a Z...

instance Monoid [a] where mempty = [] mappend = (++) Checking the Monoid laws for this instance: mempty `mappend` x = x <-> [] ++ xs = xs -- prepending an empty list is a no-op x `mappend` mempty = x <-> xs ++ [] = xs -- appending an empty list is a no-op x...

In the following examples, we'll be using the following samples: List<Product> Products = new List<Product>() { new Product() { ProductId = 1, Name = "Book nr 1", Price = 25 }, new Product() { ProductId = 2, Name = "Book nr 2&quot...

By default, user input history in IEx do not persist across different sessions. erlang-history adds history support to both the Erlang shell and IEx: git clone [email protected]:ferd/erlang-history.git cd erlang-history sudo make install You can now access your previous inputs using the up and d...