freeCodeCamp/guide/english/certifications/coding-interview-prep/data-structures/create-and-add-to-sets-in-es6/index.md

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Create and Add to Sets in ES6

Create and Add to Sets in ES6

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Problem Explanation

To solve this problem, you have to add an array of items to the set.

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Hints

Hint 1

Use the add function to add an array of strings to the set.

Hint 2

Use the length attribute on the values of the Set.

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Solutions

Solution 1 (Click to Show/Hide)

function checkSet() {
  var set = new Set([1, 2, 3, 3, 2, 1, 2, 3, 1]);
  set.add("Taco");
  set.add("Cat");
  set.add("Awesome");
  console.log(Array.from(set));
  return set;
}

checkSet();

Code Explanation

• Creating a set object as shown in pre-written code will create the set without duplicate objects.
• Therefore, by using the add function, we can add items to the set and they will not be duplicated, and will still be represented in the array.