Leetcode: Jianzhi offer 03 Duplicate numbers in array

Find the repeated numbers in the array .

At a length of n Array of nums All the numbers in 0～n-1 Within the scope of . Some numbers in the array are repeated , But I don't know how many numbers are repeated , I don't know how many times each number has been repeated . Please find any duplicate number in the array .

Example 1：

 Input ：
[2, 3, 1, 0, 2, 5, 3]
 Output ：2  or  3 

Limit ：

• 2 <= n <= 100000

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Their thinking

1. First, sort the array , Then iterate through the array , If adjacent elements are equal , Then return to

Code

/** * @param {number[]} nums * @return {number} */
var findRepeatNumber = function(nums) {
    
    nums.sort()
    for(let i = 0; i < nums.length - 1; i++){
    
       if(nums[i] === nums[i + 1]) {
    
            return nums[i]
        }
    }
};