iskenxan

  const IronMan = stampit(Flying, Intelligence);
  const Hulk = stampit(SuperStrength, Intelligence);
  const Thor = stampit(SuperStrength, Flying);

iskenxan

  const tonyStark = IronMan({ name: 'Tony Stark' });
  tonyStark.fly();
 
  const bruceBanner = Hulk({ name: 'Bruce Banner', stamina: 10000 });
  bruceBanner.throwBoulder();

iskenxan

const mailgun = require('mailgun-js')({
    apiKey: api_key,
    domain: domain
});
 
const EmailStrategy = {
    send: function(receiptHtml, userEmail) {
        const emailBody = getEmailBody(receiptHtml, userEmail);
        mailgun.messages().send(emailBody, function (error, body) {
            console.log(body);

iskenxan

const slack = require('slack')
 
const SlackStrategy = {
    send: function(receiptHtml, userEmail) {
        const user = getUserFromEmail(userEmail);
        const slackMessageBody = getSlackMessageBody(receiptHtml, userEmail);
        slack.chat.postEphemeral({ token, channel, slackMessageBody, user })
    }
}

iskenxan

class ReceiptManager {
 
    _generateReceiptHtml(orderId, userEmail) {
        // generates and returns HTML of the receipt
    }
    
 
    sendReceipt(orderId, userEmail, sendStrategy) {
        const receiptHTML = this._generateReceiptHtml(orderId, userEmail);
        sendStrategy.send(receiptHTML, userEmail);

iskenxan

sendReceipt(orderId, userEmail, client) {
        const receiptHTML = this._generateReceiptHtml(orderId, userEmail);
        switch(client) {
            case 'email': {
                sendEmail(receiptHTML, userEmail);
                break;
            }
            case 'slack': {
                sendSlackMessage(receiptHTML, userEmail);
                break;

iskenxan

const ReceiptManager = require('./receipt-manager');
const {
    EmailStrategy,
    SlackStrategy,
} = require('./strategy');
 
function main(orderId, userEmail) {
    const manager = new ReceiptManager();
 
    const email = new EmailStrategy();

iskenxan

function Hedgehog () {
    let speed = 10000; // this is private
    this.name = 'Sonic';
    this.zoom = function () {
      // both name and speed are accessible from here
        console.log(`${this.name} zooms with the speed of ${speed} miles per second!`);
    }
}
 
 

iskenxan

class Hedgehog {
    constructor() {
        let speed = 10000; //this is private
        this.name = 'Sonic';
        this.zoom = function () {
            // can access both name and speed from here
            console.log(`${this.name} zooms with the speed of ${speed} miles per second!`);
        }
    }
 

iskenxan

let Hedgehog = (function () {
    let privateProps = new WeakMap();
 
    class Hedgehog {
        constructor(name) {
            this.name = name; // this is public
            privateProps.set(this, { speed: 1000 }); // this is private
        }
 
        zoom() {