Tutorial by Examples: sim

Simulate a custom location

Step 1: In Xcode: File -> New -> File -> Resource -> GPX File -> Next -> Give the GPX file a name(It's Taipei in this example) -> Create Step 2: Edit the GPX file <?xml version="1.0"?> <gpx version="1.1" creator="Xcode"> <wpt ...

iOS • MKMapView

Simple example

This example shows how PLINQ can be used to calculate the even numbers between 1 and 10,000 using multiple threads. Note that the resulting list will won't be ordered! var sequence = Enumerable.Range(1, 10000); var evenNumbers = sequence.AsParallel() .Where(x => x % 2...

C# Language • Parallel LINQ (PLINQ)

Simple Boilerplate : spinning cube and orbit controls with damping

This is the basic HTML file that can be used as a boilerplate when starting a project. This boilerplate uses orbit controls with damping (camera that can move around an object with deceleration effect) and creates a spinning cube. <!DOCTYPE html> <html> <head> <t...

three.js • Getting started with three.js

Running Two Simple Processes

A simple example of using multiple processes would be two processes (workers) that are executed separately. In the following example, two processes are started: countUp() counts 1 up, every second. countDown() counts 1 down, every second. import multiprocessing import time from random impor...

Python Language • Multiprocessing

Creating a Simple WebBrowser

import UIKit import WebKit class ViewController: UIViewController, UISearchBarDelegate, WKNavigationDelegate, WKUIDelegate { var searchbar: UISearchBar! //All web-browsers have a search-bar. var webView: WKWebView! //The WKWebView we'll use. var toolbar: UIToolbar! //Toolb...

iOS • WKWebView

Simple arithmetic with (( ))

#!/bin/bash echo $(( 1 + 2 )) Output: 3 # Using variables #!/bin/bash var1=4 var2=5 ((output=$var1 * $var2)) printf "%d\n" "$output" Output: 20

Bash • Bash Arithmetic

Simple arithmetic with expr

#!/bin/bash expr 1 + 2 Output: 3

Bash • Bash Arithmetic

Simulate delay in publications

In real world, connection and server delays could occur, to simulate delays in development environment Meteor._sleepForMs(ms); could be used Meteor.publish('USER_DATA', function() { Meteor._sleepForMs(3000); // Simulate 3 seconds delay return Meteor.users.find({}); });

meteor • Publishing Data

A very simple entity

@Entity class Note { @Id Integer id; @Basic String note; @Basic int count; } Getters, setters etc. are ommitted for brevity, but they are not needed for JPA anyway. This Java class would map to the following table (depending on your database, here given in on...

jpa • Basic mapping

Simple deep link

AndroidManifest.xml: <activity android:name="com.example.MainActivity" > <intent-filter> <action android:name="android.intent.action.VIEW" /> <category android:name="android.intent.category.DEFAULT" /> <c...

Android • Handling Deep Links

Simple mask that fades an image from solid to transparent

CSS div { height: 200px; width: 200px; background: url(http://lorempixel.com/200/200/nature/1); mask-image: linear-gradient(to right, white, transparent); } HTML <div></div> In the above example there is an element with an image as its background. The mask that is a...

CSS • Clipping and Masking

Simple code evaluation

You can evaluate any valid C# code: int value = await CSharpScript.EvaluateAsync<int>("15 * 89 + 95"); var span = await CSharpScript.EvaluateAsync<TimeSpan>("new DateTime(2016,1,1) - DateTime.Now"); If type is not specified, the result is object: object value = ...

C# Language • C# Script

Example: Using a Timer to perform a simple countdown.

public partial class Form1 : Form { Timer myTimer = new Timer(); int timeLeft = 10; public Form1() { InitializeComponent(); //set properties for the Timer myTimer.Interval = 1000; myTimer.Enabled = tru...

C# Language • Timers

Simple Type Class

A type class is simply a trait with one or more type parameters: trait Show[A] { def show(a: A): String } Instead of extending a type class, an implicit instance of the type class is provided for each supported type. Placing these implementations in the companion object of the type class all...

Scala Language • Type Classes

Simple Example

Given a simple DataObject like this: class MyDataObject extends DataObject { private static $db = array( 'Name' => 'Varchar(255)' ); } To provide full Create-Read-Update-Delete for the objects then this is the ModelAdmin code required: class MyModelAdmin extends ModelAd...

silverstripe • ModelAdmin

Deferred execution vs immediate execution

Some LINQ methods return a query object. This object does not hold the results of the query; instead, it has all the information needed to generate those results: var list = new List<int>() {1, 2, 3, 4, 5}; var query = list.Select(x => { Console.Write($"{x} "); return ...

linq • Method execution modes - immediate, deferred streaming, deferred non-streaming

Pessimistic Locking

appointment = Appointment.find(5) appointment.lock! #no other users can read this appointment, #they have to wait until the lock is released appointment.save! #lock is released, other users can read this account

Ruby on Rails • ActiveRecord Locking

Simple example using web-component-tester

installing npm install web-component-tester --save-dev setting up wct.conf.js module.exports = { verbose: true, plugins: { local: { browsers: ['chrome'] } } }; running node node_modules/web-component-tester/bin/wct test/index.html <html...

polymer • Unit Testing

SimpleBrowser [C#]

SimpleBrowser is a lightweight WebDriver without JavaScript support. It is considerably faster than an aforementioned PhantomJS, however when it comes to functionality, it is limited to simple tasks with no fancy features. Firstly, you will need to download the SimpleBrowser.WebDriver package and ...

selenium-webdriver • Headless Browsers

A Simple Read-only Table to View Data from a Model

This is a simple example to display read-only data that is tabular in nature using Qt's Model/View Framework. Specifically, the Qt Objects QAbstractTableModel (sub-classed in this example) and QTableView are used. Implementations of the methods rowCount(), columnCount(), data() and headerData() are...

Qt • Model/View