7. You deserved it!


#1

Where am I going wrong here? Thanks

function StaffMember(name,discountPercent){
    this.name = name;
    this.discountPercent = discountPercent;
}

var sally = new StaffMember("Sally",5);
var bob = new StaffMember("Bob",10);

// Create yourself again as 'me' with a staff discount of 20%
var me = new StaffMember("Robert", 20);

var cashRegister = {
    total:0,
    lastTransactionAmount: 0,
    add: function(itemCost){
        this.total += (itemCost || 0);
        this.lastTransactionAmount = itemCost;
    },
    scan: function(item,quantity){
        switch (item){
        case "eggs": this.add(0.98 * quantity); break;
        case "milk": this.add(1.23 * quantity); break;
        case "magazine": this.add(4.99 * quantity); break;
        case "chocolate": this.add(0.45 * quantity); break;
        }
        return true;
    },
    voidLastTransaction : function(){
        this.total -= this.lastTransactionAmount;
        this.lastTransactionAmount = 0;
    },
    // Create a new method applyStaffDiscount here
cashRegister.applyStaffDiscount = function(employee) {  
    this.total -= this.total * (employee.discountPercent / 100);
};

cashRegister.scan('eggs',1);
cashRegister.scan('milk',1);
cashRegister.scan('magazine',3);
// Apply your staff discount by passing the 'me' object 
// to applyStaffDiscount
applyStaffDiscount(me);

// Show the total bill
console.log('Your bill is '+cashRegister.total.toFixed(2));

#2

here you added voidLastTransaction method:

    voidLastTransaction : function(){
        this.total -= this.lastTransactionAmount;
        this.lastTransactionAmount = 0;
    },

which you did fine, now look at the syntax you used for adding the applyStaffDiscount method:

   cashRegister.applyStaffDiscount = function(employee) {  
       this.total -= this.total * (employee.discountPercent / 100);

You decided to use very different syntax while both are methods of cashRegister object


#3

then you call your applyStaffDiscount method:

applyStaffDiscount(me);

but this method is part of the cashRegister object, so you need the following syntax:

objectName.methodName(argument)

just like you did with calling the scan method


#4

Thank you, that makes sense.


#5

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