Three Summedium

/**
 * @param {number[]} nums
 * @return {number[][]}
 */
function threeSum(nums) {
    // TODO: find all unique triplets that sum to zero
    return [];
}

console.log(threeSum([-1, 0, 1, 2, -1, -4])); // [[-1,-1,2],[-1,0,1]]
console.log(threeSum([0, 0, 0]));               // [[0,0,0]]