5/7: need help here please


#1

The code keeps saying: Oops, try again. There was a problem with your syntax.

var cashRegister = {
total:0,
lastTransactionAmount: 0,
add: function(itemCost) {
this.total += itemCost;
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;
};
//Add the voidLastTransaction Method here
voidLastTransaction: function() {
this.total -= this.lastTransactionAmount;
}

};

cashRegister.scan('eggs',1);
cashRegister.scan('milk',1);
cashRegister.scan('magazine',1);
cashRegister.scan('chocolate',4);

//Void the last transaction and then add 3 instead
cashRgeister.voidLastTransaction();
cashRegister.scan('chocolate',3);
//Show the total bill
console.log('Your bill is '+cashRegister.total);


#2

The problem was in front of you the whole time.

try this:

cashRegister.voidLastTransaction();


#3

guilted thanks for the help, but it's still not passing.


#4

if not, try moving it above the scan so it looks like this:

add: function(itemCost) {
this.total += itemCost;
this.lastTransactionAmount = itemCost;
},
voidLastTransaction: function(){
this.total = this.total - this.lastTransactionAmount;
},

hope those fix it.


#5

very much appreciated guilted. it finally worked, Thank you.


#6

I thins this would work

var cashRegister = {
total:0,
//Dont forget to add your property
add: function(itemCost) {
this.total += itemCost;
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;
},
//Add the voidLastTransaction Method here
voidLastTransaction: function() {
this.total -= this.lastTransactionAmount;
},

};
cashRegister.scan('eggs',1);
cashRegister.scan('milk',1);
cashRegister.scan('magazine',1);
cashRegister.scan('chocolate',4);

//Void the last transaction and then add 3 instead
cashRegister.voidLastTransaction();
cashRegister.scan("chocolate", 3);

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