Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

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
28,693 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.