Tutorial by Examples: sim

Simple Progress reporting

IProgress<T> can be used to report progress of some procedure to another procedure. This example shows how you can create a basic method that reports its progress. void Main() { IProgress<int> p = new Progress<int>(progress => { Console.WriteLine("Runni...

.NET Framework • Using Progress and IProgress

Writing a Simple Test

Unit tests are declared in the test/runtests.jl file in a package. Typically, this file begins using MyModule using Base.Test The basic unit of testing is the @test macro. This macro is like an assertion of sorts. Any boolean expression can be tested in the @test macro: @test 1 + 1 == 2 @test...

Julia Language • Unit Testing

Simple D3 Chart: Hello World!

Paste this code into an empty HTML file and run it in your browser. <!DOCTYPE html> <body> <script src="https://d3js.org/d3.v4.js"></script>  <script> //This code will visualize a data set as a simple scatt...

d3.js • Getting started with d3.js

Simple Application Object example: Minimize the Excel window

This code uses the top level Application object to minimize the main Excel window. Sub MinimizeExcel() Application.WindowState = xlMinimized End Sub

excel-vba • Application object

Simple example - Enabling WindowsFeature

configuration EnableIISFeature { node localhost { WindowsFeature IIS { Ensure = “Present” Name = “Web-Server” } } } If you run this configuration in Powershell (EnableIISFeature), it will produce a localho...

PowerShell • Desired State Configuration

A simple RSpec example

In greeter.rb (wherever that goes in your project): class Greeter def greet "Hello, world!" end end In spec/greeter_spec.rb: require_relative '../greeter.rb' RSpec.describe Greeter do describe '#greet' do it "says hello" do expect(Greeter.new.gr...

rspec • Getting started with rspec

Some simple Ruby step definitions

In features/step_definitions/documentation.rb: When /^I go to the "([^"]+)" documentation$/ do |section| path_part = case section when "Documentation" "documentation" else raise "Unknown documentation section: #{section...

cucumber • Step definitions

Decorating a Model using SimpleDelegator

Most Rails developers start by modifying their model information within the template itself: <h1><%= "#{ @user.first_name } #{ @user.last_name }" %></h1> <h3>joined: <%= @user.created_at.in_time_zone(current_user.timezone).strftime("%A, %d %b %Y %l:%M %p&q...

Ruby on Rails • Decorator pattern

Creating a simple Behavior

To create a Behavior just extend the CoordinatorLayout.Behavior class. Extend the CoordinatorLayout.Behavior Example: public class MyBehavior<V extends View> extends CoordinatorLayout.Behavior<V> { /** * Default constructor. */ public MyBehavior() { ...

Android • CoordinatorLayout and Behaviors

A simple proof

Theorem my_first_theorem : 1 + 1 = 2. Proof. reflexivity. Qed. Try it in your browser.

coq • Getting started with coq

Extending String to do simple pattern matching

extension String { func matchesPattern(pattern: String) -> Bool { do { let regex = try NSRegularExpression(pattern: pattern, options: NSRegularExpressionOptions(rawValue: 0)) let range: NSRange = NSMakeRange(...

Swift Language • NSRegularExpression in Swift

Simple CSV parsing

Consider this CSV data: #id,title,text 1,hello world,"This is a ""blog""." 2,second time,"My second entry." This data can be read with the following code: // r can be any io.Reader, including a file. csvReader := csv.NewReader(r) // Set comment char...

Go • Parsing CSV files

simple injection sample

If the SQL statement is constructed like this: SQL = "SELECT * FROM Users WHERE username = '" + user + "' AND password ='" + pw + "'"; db.execute(SQL); Then a hacker could retrieve your data by giving a password like pw' or '1'='1; the resulting SQL statement will ...

SQL • SQL Injection

Simple usage

In your package.json make sure to include the dependencies: { ... "dependencies": { ... "ionic-native": "^1.3.10", ... }, ... } To use geolocation: // custom-component.ts import {Geolocation} from 'ionic-native'; ...

ionic2 • Geolocation

A simple POST request with GSON

Sample JSON: { "id": "12345", "type": "android" } Define your request: public class GetDeviceRequest { @SerializedName("deviceId") private String mDeviceId; public GetDeviceRequest(String deviceId) { this....

Android • Retrofit2

simple usage

Three things are needed to use async-await: The Task object: This object is returned by a method which is executed asynchronously. It allows you to control the execution of the method. The await keyword: "Awaits" a Task. Put this keyword before the Task to asynchronously wait for it to...

async-await • Getting started with async-await

Simple File Upload

url = 'http://your_url' files = {'file': open('myfile.test', 'rb')} r = requests.post(url, files=files)

python-requests • Files

Simple "When" Example(s)

Given: --- variable_name: True Then, these tasks with always run. - name: This is a conditional task module: src=/example/ dest=/example when: variable_name - name: This is a conditional task module: src=/example/ dest=/example when: True This task will never run. - name: T...

ansible • Ansible: Loops and Conditionals

Simple Actor Implementation

Consider a communication happening between a Employee and its HR Department. Broadly these are explained in the following six steps when a message is passed to the actor: Employee creates something called an ActorSystem. It uses the ActorSystem to create something called as ActorRef. Th...

akka • Hello world

A Simple Twig Extension -- Symfony 2.8

Before creating any extension, always check if it has already been implemented. The first thing one would have to do is define the extension class which will house the twig filters and/or functions. <?php namespace AppBundle\Twig; class DemoExtension extends \Twig_Extension { /** ...

symfony2 • Symfony Twig Extensions