How to remove duplicate arrays in an array? [closed]

Question

const arr = [[1, 2], [1, 2], [3, 4], [7, 7]];

how to remove duplicate arrays from the given array? The first two elements of the array are the same. I couldn't fix it with the set.

Answer 1

Use method filter().

const arr = [[1, 2], [1, 2], [3, 4], [7, 7]];
const arrNoDouble = arr.filter((a = {}, b => !(a[b] = b in a)));

console.log(JSON.stringify(arrNoDouble));