SimpleTestWebApp.js

var Product = (function(){    
    var name = "",
        description = "",
        price = 0,
        stock = 0,
        manufacturer = "",
        category = 0;
    
    var _this = this;
    
    return {
        Stock: this.stock,
        
        // Getter
        getProductName: function() { return this.name; }, 
        getDescription: function() { return this.description; }, 
        getProductPrice: function() { return this.price; },
        getManufacturer: function() { return this.manufacturer; },    
        getCategory: function() { return this.category; },
        getStock: function() { return this.stock; },
        
        // Setter                             
        setProductName: function(name) { this.name = name; return this; }, 
        setDescription: function(descritpion) { this.description = descritpion; return this; }, 
        setProductPrice: function(price) { this.price = price; return this; }, 
        setManufacturer: function(manufacturer) { this.manufacturer = manufacturer; return this; },
        setCategory: function(category) { this.category = category; return this; },
        setStock: function(stock) { this.stock = stock; return this; },               
        
        // Misc Functions 
        reducePrice: function(reduceVal) {
            var tmpPrice = this.price;
            if(tmpPrice>0) {
                this.price = tmpPrice - (tmpPrice * parseInt(reduceVal) / 100);    
            }            
        }
    } 
}); 

var products = [];
products.push( new Product().setProductName("Apple Macbook Pro 15")
                            .setDescription("Profesional arbeiten mit dem neuen Macbook von Apple.")
                            .setProductPrice(1500)
                            .setCategory("Notebooks")
                            .setStock(3)
                            .setManufacturer("Apple"));

products.push( new Product().setProductName("Dell Latitude E6420")
                            .setDescription("Dell Latitude E6420 Core i7-2620M 2,70 GHz 256 GB SSD BACKLIT-TASTATUR 1600 x 900 WEBCAM.")
                            .setProductPrice(800)
                            .setCategory("Notebooks")
                            .setStock(13)
                            .setManufacturer("Dell"));
                            
products.push(new Product().setProductName("Apple iPad Pro")
                           .setDescription("Auf der Couch oder für den Büroalltag.")
                           .setProductPrice(499)
                           .setCategory("Tablets")
                           .setStock(10)
                           .setManufacturer("Apple Inc."));
        
var getList = function(products) {
    var list = [];    
    products.forEach(function(product, index, array){
        list.push('Artikel (' + (index).toString() + '): ' + product.getProductName() + ' für unschlagbare ' + product.getProductPrice() + '\n' );        
    });
    return list.join();
}

var Print = function(out) {
    console.log(out);
};

Print('Products: \n' + getList(products)); 

// Sortieren:
var compareFunc = function(a,b) {
    console.log('a: ' + a.getProductPrice() );
    console.log('b: ' + b.getProductPrice() );
    return a.getProductPrice() - b.getProductPrice();
}
products.sort(compareFunc);

// Alle Artikel über 1000 EUR um 10% reduzieren
var priceMarge = 1000;
var saleProducts = (products.filter( f => f.getProductPrice() > priceMarge )).map( (p) => { p.reducePrice(10); return p; } ) ;
Print('For Sale: \n' + getList(saleProducts)); 

// Anzahl Notebooks auf Lager:
Print('ANZAHL: '+(products.length).toString())
var amount = products.reduce( (prev, current) => { return prev.Stock + current.Stock; });
Print('Menge: \n' + amount); 

//var elem = document.getElementById("content");
//elem.innerHTML = "Liste aller Artikel";
//elem.innerHTML = getList(products);