Product Inventary

Author: Potecaru Tudor

Classes/00. Product Inventary Project.js

@@ -0,0 +1,70 @@
+/*
+    Classes 00. Product Inventory Project - Create an application which manages an inventory of products. Create a product class which has a price, id, and quantity on hand.
+    Then create an inventory class which keeps track of various products and can sum up the inventory value. 
+*/
+
+(function () {
+    "use strict";
+}());
+
+function Product(id, name, price, quantity) {
+    this.id = id;
+    this.name = name;
+    this.price = price;
+    this.quantity = quantity;
+}
+
+Product.prototype = {
+    add : function (count) {
+        this.quantity = !count ? this.quantity++ : this.quantity + count;
+    },
+
+    remove : function (count) {
+        this.quantity = !count ? this.quantity-- : this.quantity - count >= 0 ? this.quantity - count : 0;
+    },
+
+    setPrice : function (value) {
+        this.price = value;
+    },
+
+    toString : function () {
+        return this.name;
+    }
+};
+
+function Inventary() {
+    this.items = arguments !== undefined ? Array.prototype.slice.call(arguments) : [];
+}
+
+Inventary.prototype = {
+    add : function (item) {
+        this.items.push(item);
+    },
+
+    remove : function (item) {
+        var index = this.items.indexOf(item);
+
+        if (index > -1) {
+            this.items.splice(index, 1);
+        }
+    },
+
+    getTotalPrice : function () {
+        var totalPrice = 0;
+
+        return (function (items) {
+            items.map(function (item) {
+                totalPrice += item.price;
+            });
+
+            return totalPrice;
+        }(this.items));
+    }
+};
+
+var peaches = new Product(0, "peaches", 5, 5000);
+var carrots = new Product(1, "carrots", 2, 10000);
+var bananas = new Product(2, "bananas", 6, 3000);
+
+var inventary = new Inventary(peaches, carrots, bananas);
+inventary.getTotalPrice();

Numbers/01. Fibonacci Sequence.js

@@ -2,17 +2,30 @@
     Numbers 01. Fibonacci Sequence - Enter a number and have the program generate the Fibonacci sequence to that number or to the Nth number. 
 */
 
-var fibonacci = function (n) {
+var fibonacci = (function () {
     "use strict";
 
-    var i,
-        sequence = [0, 1];
+    var memo = {};
 
-    for (i = 2; i < n; i++) {
-        sequence.push(sequence[i - 2] + sequence[i - 1]);
+    function f(n) {
+        var value;
+
+        if (memo.hasOwnProperty(n)) {
+            value = memo[n];
+        } else {
+            if (n === 0 || n === 1) {
+                value = n;
+            } else {
+                value = f(n - 1) + f(n - 2);
+            }
+
+            memo[n] = value;
+        }
+
+        return value;
     }
 
-    return sequence;
-};
+    return f;
+}());
 
 this.console.log(fibonacci(10));