找出数组中重复的数字-golang

找出数组中重复的数字-golang

func duplicateInArray(nums []int) int {
    n := len(nums)
    for _, v := range nums{
        if v <0 || v >= n{
            return -1
        }
    }

    for i := 0; i < n; i++{
        for nums[i] != nums[nums[i]]{
            nums[i], nums[nums[i]] = nums[nums[i]], nums[i]
        }
        if nums[i] != i{
            return nums[i]
        }
    }
    return -1
}