Whats wrong here?it shows that "Oops, try again. It looks like you have an error in your code! Check the error message for more details: TypeError: cashRegister.voidLastTransactionAmount is not a function "


#1

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

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.voidLastTransactionAmount();
cashRegister.scan('chocolate',3);

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

#2

The error message is pointing here,

This should be lastTransactionAmount and not lastTansaction.

I hope this helps! :slight_smile:


#3

Also here:

//Void the last transaction and then add 3 instead
cashRegister.voidLastTransactionAmount();

cashRegister doesn't have method voidLastTransactionAmount().

Correct code:

var cashRegister = {
    total:0,
    lastTransactionAmount:0,
    //Dont forget to add your property
    add: function(itemCost) {
        this.total +=  itemCost;
        this.lastTansactionAmount = itemCost; // problem was here (as bayoishola20 said)
    },
    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(){
         console.log( this.total -=this.lastTansactionAmount);
         
         }
    
};

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(); // and here
cashRegister.scan('chocolate',3);

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

Results:
7.2
Your bill is 8.55

#4

thank u ..it solved,,,,,,,,,


#5

Thank u so much...............:slight_smile:


#6

You're welcome, @mufarria .

Have fun coding! :slight_smile:


#7

This topic was automatically closed 7 days after the last reply. New replies are no longer allowed.