Bleep Bleep >>> HELP>>>WHAT's WRONG WITH MY CODE?


#1

var cashRegister = {
total:0,
//Dont forget to add your property
lastTransactionAmount: total,
add: function(itemCost) {
this.total += 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(){
total - 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
voidLastTransaction();
cashRegister.scan('eggs');
cashRegister.scan('eggs');
cashRegister.scan('eggs');

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


#2

CashRegister.scan has two parameters and thus requires two arguments. When you "added 3" eggs, you are only passing one argument.

edit: You also, likely need to add 'chocolate' after voidLastTransaction() instead of eggs, as well.


#3

change to this.total -= this.lastTransactionAmount

"lastTransactionAmount: total," you can not do it


#4

var cashRegister = {
total:0,
lastTransactionAmount:0,
//Dont forget to add your property
add: function(itemCost) {
this.total += itemCost;
this.lastTransactionAmount = itemCost;
console.log(this.total)
},
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(lastTransactionAmount){
     this.total = this.total - this.lastTransactionAmount;
     console.log(this.total);
     console.log(this.lastTransactionAmount)
}

};

this one works, you can look through


#5

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