Bleep Bleep- return function


#1

Hello there,
My code works just fine in this exercise. Though I had a bug which was hard to find.
Consider the following -
voidLastTransaction: function() {
return this.total-=this.lastTransactionAmount;
}
Why do I get "False", when I compile my code without writing RETURN.
I need some explanation. I might be missing the concept here!


#2

@twinkle.s,
Could you provide the full code you are using ???


#3

Below is the code!
var cashRegister = {
total:0,
//Dont forget to add your property
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() {
return 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);


#4

Get rid of the 'return' in the voidLastTransaction method. Should just be:

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