products.js

var products = [
    {
        id: 1,
        name: 'Mac Book Pro',
        description: 'Apple 13 inch Mac Book Pro Notebook',
        price: 1000
    },{
        id: 2,
        name: 'iPad',
        description: 'Apple 64GB non-3G tablet computer',
        price: 899
    },{
        id: 3,
        name: 'iPhone 4',
        description: 'Apple 16GB iPhone 4\'s generation'
    }
];

module.exports.all = products;

module.exports.find = function (id) {
    id = parseInt(id, 10);
    var found = null;
    productloop: for(product_index in products) {
        var product = products[product_index];
        if (product.id == id) {
            found = product;
            break productloop;
        }
    };
    return found;
}

module.exports.set = function(id, product) {
	id = parseInt(id, 10);
	product.id = id;
	products[id - 1] = product;
}

module.exports.new = function () {
    return {
    	name: '',
    	description: '',
    	price: 0
    };
}

module.exports.insert = function (product) {
	var id = products.length + 1;
	product.id = id;
	products[id - 1] = product;
	return id;
}