Tutorial by Examples: w

Switches can switch on tuples: public typealias mdyTuple = (month: Int, day: Int, year: Int) let fredsBirthday = (month: 4, day: 3, year: 1973) switch theMDY { //You can match on a literal tuple: case (fredsBirthday): message = "\(date) \(prefix) the day Fred was born"...

Player player; //The player you want to award your achievement with Achievement achievement; //The achievement you want to award your player player.awardAchievement(achievement); //Awarding the achievement Checking if player has achievement: Player player; Achievement achievement...

First, you need to install pry-byebug gem. Run this command: $ gem install pry-byebug Add this line at the top of your .rb file: require 'pry-byebug' Then insert this line wherever you want a breakpoint: binding.pry A hello.rb example: require 'pry-byebug' def hello_world puts &qu...

Place the following code into a file name helloworld.js console.log("Hello World"); Save the file, and execute it through Node.js: node helloworld.js

Prerequisites: Install Firefox Install Selenium IDE addon (https://addons.mozilla.org/fr/firefox/addon/selenium-ide/) Open the plugin. A button displaying a red circle must be shown. If it's pressed, it means you can start your scenario. The plugin is recording everything you do within this F...

Install a Common Lisp implementation on the server. (E.g. sbcl, clisp, etc...) Install quicklisp on the server. Load SWANK with (ql:quickload :swank) Start the server with (swank:create-server). The default port is 4005. [On your local machine] Create a SSH tunnel with ssh -L4005:127.0.0.1:400...

If you are tired of using long commands in bash you can create your own command alias. The best way to do this is to modify (or create if it does not exist) a file called .bash_aliases in your home folder. The general syntax is: alias command_alias='actual_command' where actual_command is the c...

for ([declaration-or-expression]; [expression2]; [expression3]) { /* body of the loop */ } In a for loop, the loop condition has three expressions, all optional. The first expression, declaration-or-expression, initializes the loop. It is executed exactly once at the beginning of the lo...

Player toUnhide; Player toSeeAgain toSeeAgain.show(toUnhide); //Player toSeeAgain will now see Player toUnhide again. If player is already visible, nothing happens.

JSON arrays represent a collection of objects. In JS, theres a bunch of collection functions off of them such as slice, pop, push. Objects have just more raw data. A JSONArray is an ordered sequence of values. Its external text form is a string wrapped in square brackets with commas separating the ...

This example shows how to populate report with data returned by a data view delegate. During the exercise, we will develop an inquiry screen showing list of Sales Orders between two dates. Data view delegate will be used to populate Sales Order information. Prerequisites: We start with declara...

""" usage: sub <command> commands: status - show status list - print list """ import sys def check(): print("status") return 0 if sys.argv[1:] == ['status']: sys.exit(check()) elif sys.argv[1:] == ['list']: ...

If a function returns a std::vector type, and it is exposed to Python directly like std::vector<float> secondMethod() { return std::vector<float>(); } BOOST_PYTHON_MODULE(CppProject) { boost::python::def("getEmptyVec", secondMethod); } then when the functions...

You can wait until the next frame. yield return null; // wait until sometime in the next frame You can have multiple of these calls in a row, to simply wait for as many frames as desired. //wait for a few frames yield return null; yield return null; Wait for approximately n seconds. It is ...

Sometimes you want to keep the switched-out components in memory, to make that happen, you should use <keep-alive> element: Javascript: new Vue({ el: '#app', data: { currentPage: 'home', }, methods: { switchTo: function(page) { this.currentPage = page; ...

const process = require('process'); const rl = require('readline').createInterface(process.stdin, process.stdout); rl.pause(); console.log('Something long is happening here...'); var cliConfig = { promptPrefix: ' > ' } /* Commands recognition BEGIN */ var commands = {...

When using PowerShell, you can use setx.exe to set environment variables permanently. Start PowerShell Type one of the following: setx ASPNETCORE_ENVIRONMENT "development" setx ASPNETCORE_ENVIRONMENT "staging" Restart PowerShell

If you want to use connection object for query database you can use this sample code. var queryString = "SELECT name, age FROM students " ; var query = client.query(queryString); query.on("row", (row, result)=> { result.addRow(row); }); query.on("end", func...

Some WMI Classes expose Methods that allow you to do something with that object. For example, the Win32_Printer class has 11 methods for interacting with a printer, one of which is the PrintTestPage method. The following code demonstrates how to select a specific printer and print a test page. 'Spe...

This tslint.json example contains a set of configuration to enforce more typings, catch common errors or otherwise confusing constructs that are prone to producing bugs and following more the Coding Guidelines for TypeScript Contributors. To enforce this rules, include tslint in your build process ...