Tutorial by Examples: e

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

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

Appending data

//the path of the file string filePath = "C:\\ExcelDemo.xlsx"; //or if you use asp.net, get the relative path filePath = Server.MapPath("ExcelDemo.xlsx"); //create a fileinfo object of an excel file on the disk FileInfo file = new FileInfo(filePath); //create a new Ex...

epplus • Append data to existing document

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

File suffix

If you name your file lib_linux.go, all the content in that file will only be compiled in linux environments: package lib var OnlyCompiledInLinux string

Go • Developing for Multiple Platforms with Conditional Compiling

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

Installation or Setup

Detailed instructions on getting push-notification set up or installed.

push-notification • Getting started with push-notification

Basic examples

λ> :t 1 1 :: Num t => t λ> :t pi pi :: Floating a => a In the examples above, the type-checker infers a type-class rather than a concrete type for the two constants. In Haskell, the Num class is the most general numerical one (since it encompasses integers and reals), but pi must...

Haskell Language • Arithmetic

`Could not deduce (Fractional Int) ...`

The error message in the title is a common beginner mistake. Let's see how it arises and how to fix it. Suppose we need to compute the average value of a list of numbers; the following declaration would seem to do it, but it wouldn't compile: averageOfList ll = sum ll / length ll The problem is...

Haskell Language • Arithmetic

Function examples

What's the type of (+) ? λ> :t (+) (+) :: Num a => a -> a -> a What's the type of sqrt ? λ> :t sqrt sqrt :: Floating a => a -> a What's the type of sqrt . fromIntegral ? sqrt . fromIntegral :: (Integral a, Floating c) => a -> c

Haskell Language • Arithmetic