7. You Deserved It!


#1

Ok something do not work. There will give me a TypeError
TypeError: Cannot read property ‘discountPercent’ of undefined
I test it also with
cashRegister.applyStaffDiscount[me];
than it give me a bill but is not without the discount me
Can someone help me?

the code


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 = StaffMember("Jana",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.applyStaffDiscount(me);

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

#2

here:

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 = StaffMember("Jana",20);

you create sally and bob correctly by making the new staff members, but then when you create me you forget new keyword, so me isn’t created correctly

applyStaffDiscount() is a method, so it requires parentheses, don’t use square brackets


#3

Thanks now it works fine. I look and look but i do not see my mistake. Thanks for your help.


#4

Its a difficult mistake to spot. Its so easy to miss, and the error might throw you off, that you look in the wrong section of the code

You’re welcome :slight_smile:


#5

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