7/7 Cash Register


#1
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("Medo",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
    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
cashRegister.applyStaffDiscouont(me);

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

The error still appearing
saying TypeError: cashRegister.applyStaffDiscouont is not a function


#2

It's a typo. Notice how the error message is spelled?

applyStaffDiscouont

Fix that and it will work. Spelling has to be perfect in coding, because discount, discouont, and Discount all mean 3 different things.

Should work once you fix that.


#3

You kinda typoed, hehe.

Your function works fine, but you called

cashRegister.applyStaffDiscouont
                             ^

rather than

cashRegister.applyStaffDiscount

Also, you don't calculate percentages like that. If I have a 20% discount on something, and I would use your calculator, I'd get:

this.total -= this.total * (20/100);

Which is

this.total = this.total * 0.2

A 20% discount is (num - 20%), not 20% of num.