JavaScript patterns

Patterns.js

//"Module" patterns
const Bucket = (function(){
  let sum = 0;
  const goods = [];
  
  return {
    printProducts: function() {
      goods.forEach(item => console.log(item));
    },
    addProduct: function(product) {
      goods.push(product);
      sum += product.price;
      console.log(goods);
    }
  }
}());

const bread = {
  name: 'Bread',
  price: 20
};

const sault = {
  name: 'Sault',
  price: 30
};

Bucket.addProduct(bread);
Bucket.addProduct(sault);
Bucket.printProducts(sault);



//"Singletone" pattern
const Singletone = (function() {
  let instance;
  
  function Singletone() {
    if (!instance) {
      instance = this;
    } else {
      return instance;
    }
  };
  
  Singletone.prototype.connect = function() {
    console.log('Yep connected');
  };
  
  return Singletone;
}());

const s1 = new Singletone();
const s2 = new Singletone();

console.log(s1 === s2);
s1.connect();