5/7 bleep bleep


#1



5/7 Bleep Bleep


I think my code is working correctly, I just don't understand why i need to define lastTransactionAmount = itemCost. Why can't I just call itemCost directly?


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


#2
add: function(itemCost) {
    this.total +=  itemCost;
    this.lastTransactionAmount = itemCost;
},

THAT'S THE CORRECT WAY.


#3
voidLastTransaction: function(){
this.total -= this.lastTransactionAmount;
}

and add "this" here too