Leetcode 题目解析之 Remove Duplicates from Sorted Array

Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length.

Do not allocate extra space for another array, you must do this in place with constant memory.

For example,

Given input array nums = 1,1,2,

Your function should return length = 2, with the first two elements of nums being 1 and 2 respectively. It doesn't matter what you leave beyond the new length.

代码语言：txt复制

    public int removeDuplicates(int[] nums) {
        if (nums == null) {
            return -1;
        }
        if (nums.length < 2) {
            return nums.length;
        }
        int len = 0;
        for (int i = 1; i < nums.length; i  ) {
            if (nums[len] != nums[i]) {
                nums[  len] = nums[i];
            }
        }
        return len   1;
    }

duplicates function input memory return

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