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JavaScript Object-Oriented JavaScript (2015) Constructor Functions and Prototypes Make a Constructor Challenge

Marcy Montross
PLUS
Marcy Montross
Courses Plus Student 5,382 Points

My solution logs the function itself and not the result.

function Dice (sides) {
  this.sides = sides;
  this.roll = function (){
    var randomNumber = Math.floor(Math.random() * this.sides) + 1; 
    return randomNumber;
  };
}

var dice = new Dice(6);

this logs out the "this.roll" function itself and not the returned value. What's wrong?

3 Answers

don't forget that when you call dice.roll() you need to add the "()"... it is a function/method.

Simon Coates
Simon Coates
28,694 Points
function Dice (sides) { 
this.sides = sides;
 this.roll = function (){ 
var randomNumber = Math.floor(Math.random() * this.sides) + 1; return randomNumber; }; }

var dice = new Dice(6);
undefined
dice.roll();
1
dice.roll();
5

so i pasted your code into the developer console and called roll a couple times. The 1 and 5 are what was returned. You are including the () when you dice.roll() ?

Marcy Montross
PLUS
Marcy Montross
Courses Plus Student 5,382 Points

The problem appears to be with the Treehouse workspace. (https://teamtreehouse.com/workspaces/17321142) I see now that locally, it works.