func threeSum(nums []int) [][]int {
// Sort the array
sort.Ints(nums)
var res [][]int
// Loop through the array
for i := 0; i < len(nums)-2; i++ {
// Skip duplicates
if i > 0 && nums[i] == nums[i-1] {
continue
}
// Set left and right pointers
l, r := i+1, len(nums)-1
// Loop through the array
for l < r {
// Calculate sum of three numbers
sum := nums[i] + nums[l] + nums[r]
if sum < 0 {
l++
} else if sum > 0 {
r--
} else {
// Add triplet to result slice
res = append(res, []int{nums[i], nums[l], nums[r]})
// Skip duplicates
for l < r && nums[l] == nums[l+1] {
l++
}
for l < r && nums[r] == nums[r-1] {
r--
}
// Move pointers
l++
r--
}
}
}
return res
}