Tutorial by Examples: r

Variables in SCSS

In SCSS variables begin with $ sign, and are set like CSS properties. $label-color: #eee; They are only available within nested selectors where they’re defined. #menu { $basic-color: #eee; color: $basic-color; } If they’re defined outside of any nested selectors, then they can be us...

sass • Variables

Floating-point literals

Floating point literals provide values that can be used where you need a float or double instance. There are three kinds of floating point literal. Simple decimal forms Scaled decimal forms Hexadecimal forms (The JLS syntax rules combine the two decimal forms into a single form. We treat t...

Java Language • Literals

Default Function Parameters

function addTwo(a, b = 2) { return a + b; } addTwo(3) // Returns the result 5 With the addition of default function parameters you can now make arguments optional and have them default to a value of your choice.

Node.js • Node.js v6 New Features and Improvement

Rest Parameters

function argumentLength(...args) { return args.length; } argumentLength(5) // returns 1 argumentLength(5, 3) //returns 2 argumentLength(5, 3, 6) //returns 3 By prefacing the last argument of your function with ... all arguments passed to the function are read as an array. In this examp...

Node.js • Node.js v6 New Features and Improvement

Spread Operator

function myFunction(x, y, z) { } var args = [0, 1, 2]; myFunction(...args); The spread syntax allows an expression to be expanded in places where multiple arguments (for function calls) or multiple elements (for array literals) or multiple variables are expected. Just like the rest parameters s...

Node.js • Node.js v6 New Features and Improvement

Throwing Error

Throwing error means exception if any exception is not handled then the node server will crash. The following line throws error: throw new Error("Some error occurred"); or var err = new Error("Some error occurred"); throw err; or throw "Some error occurred";...

Node.js • Node.js Error Management

try...catch block

try...catch block is for handling exceptions, remember exception means the thrown error not the error. try { var a = 1; b++; //this will cause an error because be is undefined console.log(b); //this line will not be executed } catch (error) { console.log(error); //here we handl...

Node.js • Node.js Error Management

How to configure the font size of views in Eclipse on Linux

Eclipse does not give you the possibility to change the font size of the views like 'Project Explorer' or 'Servers', which looks ugly on Linux since Eclipse uses the default (desktop) font size. But you can edit specific configuration files to get the proper font sizes. To fix this annoying font si...

eclipse • Configuring Eclipse

Hello Spring Security

Note 1: You need some prior knowledge about java servlet page(JSP) and Apache Maven before you start this examples. Start the web server (like Apache tomcat) with existing web project or create one. Visit the index.jsp. Anybody can access that page, it's insecure! Securing application ...

spring-security • Getting started with spring-security

Getting started with Angular 2 with node.js/expressjs backend (http example included)

We will create a simple "Hello World!" app with Angular2 2.4.1 (@NgModule change) with a node.js (expressjs) backend. Prerequisites Node.js v4.x.x or higher npm v3.x.x or higher or yarn Then run npm install -g typescript or yarn global add typescriptto install typescript globally ...

Angular 2 • Getting started with Angular 2

Creating a future with oneshot function

There are some general Future trait implementations in the futures crate. One of them is implemented in futures::sync::oneshot module and is available through futures::oneshot function: extern crate futures; use std::thread; use futures::Future; fn expensive_computation() -> u32 { //...

Rust • Futures and Async IO

CKEditor - Inline Editor Example

Create a file ckeditor-inline.html with the following content: <!DOCTYPE html> <html> <head> <title>CKEditor Inline Demo!</title> </head> <body> <script src="//cdn.ckeditor.com/4.6.1/basic/ckeditor.js"></script> <...

ckeditor • Getting started with ckeditor

define and use functions f1 and f2 with parameters

You can pass parameters to the functions in tf.cond() using lambda and the code is as bellow. x = tf.placeholder(tf.float32) y = tf.placeholder(tf.float32) z = tf.placeholder(tf.float32) def fn1(a, b): return tf.mul(a, b) def fn2(a, b): return tf.add(a, b) pred = tf.placeholder(tf....

tensorflow • Using if condition inside the TensorFlow graph with tf.cond

Defining separate behaviours in different platforms

Different platforms can have separate implementations of the same method. This example also illustrates how build tags and file suffixes can be used together. File main.go: package main import "fmt" func main() { fmt.Println("Hello World from Conditional Compilation Doc!&...

Go • Developing for Multiple Platforms with Conditional Compiling

Installing Laravel

Requirements: You need PHP >= 5.6.4 and Composer installed on your machine. You can check version of both by using command: For PHP: php -v Output like this: PHP 7.0.9 (cli) (built: Aug 26 2016 06:17:04) ( NTS ) Copyright (c) 1997-2016 The PHP Group Zend Engine v3.0.0, Copyright (c) 1998...

Laravel • Getting started with laravel-5.3

Installation or Setup

Detailed instructions on getting ipad set up or installed.

ipad • Getting started with ipad

Event Modifiers

Vue provides event modifiers for v-on by calling directive postfixes denoted by a dot. .stop .prevent .capture .self .once For examples:  <a v-on:click.stop="doThis"></a> <!-- the submit event will no...

Vue.js • Modifiers

Key Modifiers

When listening for keyboard events, we often need to check for common key codes. Remembering all the keyCodes is a hassle, so Vue provides aliases for the most commonly used keys: .enter .tab .delete (captures both “Delete” and “Backspace” keys) .esc .space .up .down .left .right For ...

Vue.js • Modifiers

Input Modifiers

.trim If you want user input to be trimmed automatically, you can add the trim modifier to your v-model managed inputs: <input v-model.trim="msg"> .number If you want user input to be automatically typecast as a number, you can do as follow: <input v-model.number=&q...

Vue.js • Modifiers

Producer / consumer example

pthread_mutex_t queueMutex; pthread_cond_t queueCond; Queue queue; void Initialize() { //Initialize the mutex and the condition variable pthread_mutex_init(&queueMutex, NULL); pthread_cond_init(&queueCond, NULL); } void Producer() { //First we get some new data ...

pthreads • Conditional Variables