5. Beep Beep - Oops, try again. false


#1

Hi!

I got error masage, but my output is good ( the value of the lastTransactionAmount). I dont, know what is the problem. Maybe I missunderstood this part: "//Void the last transaction and then add 3 instead"

here is my enter code:

var cashRegister = {
total:0,
lastTransactionAmount: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(){
console.log(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);

THX & Marry Xmas
Sir Random Name


#2

console.log(this.lastTransactionAmount);

I don't believe the lesson is asking that this get's logged to the console. Instead remove the amount from the total:

this.total - this.lastTransactionAmount;

Does that make sense? I didn't look back to the lesson so I'm not sure what the lesson is actually asking for, but I'm assuming that was it.


#3

Thx man, my translate was wrog... so i should remove the last shopping.

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

THX again & marry Xmax

Sir Random Name


#4

I looked at this forum and I had a similar problem. Thx to you guys I'm on my way to finishing JS!


#5

Eu fiz assim!

var cashRegister = {
total:0,
//Nao se esqueca de adicionar sua propriedade
lastTransactionAmount:0,
add: function(itemCost) {
this.total += itemCost;
this.lastTransactionAmount = itemCost;
},
scan: function(item,quantity) {
switch (item) {
case "ovos": this.add(0.98 * quantity); break;
case "leite": this.add(1.23 * quantity); break;
case "revista": this.add(4.99 * quantity); break;
case "chocolate": this.add(0.45 * quantity); break;
}
return true;
},
//Adicione o metodo voidLastTransaction aqui
voidLastTransaction: function(){
console.log( this.total -= this.lastTransactionAmount);
}
};
cashRegister.scan('ovos',1);
cashRegister.scan('leite',1);
cashRegister.scan('revista',1);
cashRegister.scan('chocolate',4);

//Anule a ultima transacao e entao adicione 3
cashRegister.voidLastTransaction();
cashRegister.scan('chocolate',3);

//Mostre o total da conta
console.log('Your bill is '+cashRegister.total);