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 JavaScript Loops Working with 'for' Loops The Refactor Challenge – Duplicate Code

Jesse Benedict
PLUS
Jesse Benedict
Courses Plus Student 4,260 Points
Posted by Jesse Benedict
Jesse Benedict
Courses Plus Student 4,260 Points

My solution for the Refactor Challenge

For future reference or usage, I've decided to leave the RGB variables alone and put them in an array instead and did it this way by implementing another loop

let html = '', red, green, blue, randomRGB;
const colors = [red, green, blue];

const RandColorPicker = (colArray) => {
  for(let i = 0; i < colArray.length; i++) {
    colArray[i] = Math.floor(Math.random() * 256);
  }
};

for(let i = 1; i < 11; i++) {
  RandColorPicker(colors);
  randomRGB = `rgb( ${colors[0]}, ${colors[1]}, ${colors[2]} )`;
  html += `<div style="background-color: ${randomRGB}">${i}</div>`;
}

document.querySelector('main').innerHTML = html;

It's not as compact but can be efficient for a further manipulation of RGB values if needed

1 Answer

Steven Parker
Steven Parker
229,608 Points
Steven Parker
Steven Parker
229,608 Points

I'm not sure if your array would be considered an improvement over the video example, but it's clever!

It occurred to me that you don't really need to declare variables for the individual color values, you can use temporary literal values when creating the array:

let html = '', randomRGB;
const colors = [0, 0, 0];

And since you want to loop through the entire array, you could use for...in:

  for (let i in colArray) {
    colArray[i] = Math.floor(Math.random() * 256);
  }

You could also use the array's forEach method instead of a loop:

  colArray.forEach((_,i,a) => {
    a[i] = Math.floor(Math.random() * 256);
  });