Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript Practice Getters and Setters in JavaScript Practicing Getters and Setters Practice Creating and Accessing a Getter method

Posted by richi richi
richi richi
552 Points

Practice Getters and Setters in JavaScript

Create an array called areas with three elements so that the first element (areas[0]) holds the value of the area property of rect1, the second element holds the value of the area property of rect2, and the third element holds the value of the area property of rect3

Hello, the question ask for an array that hold 3 values... I created the array but is showing me an error . What can be wrong?

Thanks

Rectangle.js 
class Rectangle {
    constructor(width, length){
        this.width = width;
        this.length = length;
    }
  get area(){
    return this.length * this.width;
  }
}

const rect1 = new Rectangle(10, 5);
const rect2 = new Rectangle(6, 12);
const rect3 = new Rectangle(15, 20);
var areas = [
    rect1,
  rect2,
  rect3
];

4 Answers

Eric M
Eric M
11,545 Points
Eric M
Eric M
11,545 Points

Hi richi,

Your array has the three rect objects in it. The task asks for the array to instead contain the areas of each rect object.

Cheers,

Eric

Chardai Anderson
Chardai Anderson
10,328 Points
Chardai Anderson
Chardai Anderson
10,328 Points

class Rectangle { constructor(width, length){ this.width = width; this.length = length; }

get area() { return this.width * this.length; }

}

const areas = [50,72,300];

const rect1 = new Rectangle(10, 5); const rect2 = new Rectangle(6, 12); const rect3 = new Rectangle(15, 20);

Be sure to enter value of the rects. Reference^

Gremyko Coleman
Gremyko Coleman
9,756 Points
Gremyko Coleman
Gremyko Coleman
9,756 Points

I know this is old but this is how I figured it out

you set the length and width values of rect1, rect2, rect3 by creating a new Rectangle object

then with "const areas" you call each object value rect1 , rect2, rect3 and add the get area method to it and it computes the area.

output is " areas [50, 72 , 300]" 

class Rectangle {
    constructor(width, length){
        this.width = width;
        this.length = length;
    }

    get area(){
      return this.width * this.length;
    }
}

const rect1 = new Rectangle(10, 5);
const rect2 = new Rectangle(6, 12);
const rect3 = new Rectangle(15, 20);

const areas = [rect1.area, rect2.area, rect3.area];