Duplicate Value remove

Removing Duplicates from Arrays
Method 1: Using Set
The Set object in JavaScript automatically removes duplicate values. This makes it a straightforward solution.

const array = [1, 2, 2, 3, 4, 4, 5];
const uniqueArray = [...new Set(array)];
console.log(uniqueArray); // Output: [1, 2, 3, 4, 5]
Method 2: Using filter()
The filter method can be combined with indexOf to only keep the first occurrence of each element.

const array = [1, 2, 2, 3, 4, 4, 5];
const uniqueArray = array.filter((item, index) => array.indexOf(item) === index);
console.log(uniqueArray); // Output: [1, 2, 3, 4, 5]
Method 3: Using reduce()
Using reduce, you can build a new array that only includes unique elements.