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 JavaScript Array Iteration Methods Combining Array Methods Chaining Array Methods

Bert Witzel
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Bert Witzel
Front End Web Development Techdegree Graduate 24,389 Points

Another way to remove duplicates from an array

const numbers = [1, 1, 2, 3, 4, 3, 5, 5, 6, 7, 3, 8, 9, 10];
const unique = [...new Set(numbers)];
console.log(unique);

treehouse:~/workspace$ node iteration.js                              
[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ]    
Mark Casavantes
Mark Casavantes
2,866 Points

Hello Bert,

I do not know if this is what you were thinking of.

let chars = [
  "1",
  "1",
  "2",
  "3",
  "4",
  "3",
  "5",
  "5",
  "6",
  "7",
  "3",
  "8",
  "9",
  "10"
];
let uniqueChars = [...new Set(chars)];

console.log(uniqueChars);

1 Answer

Mark Casavantes
Mark Casavantes
2,866 Points

Hello Bert,

I am using strings, I changed how the array is presented, I changed const to let. I was not sure what you were looking for. I was trying to be helpful. My solution is a different way to remove duplicates from an array.