版权声明:原创勿转 https://cloud.tencent.com/developer/article/1412895
两个指针差一然后一起前进,发现相同的就删除
func removeDuplicates(nums []int) int {
for i, j := 0, 1; i < j && j < len(nums); {
if nums[j] == nums[i] {
nums = append(nums[:i], nums[i+1:]...)
j--
i--
}
j++
i++
}
return len(nums)
}