只出现一次的数字

题目链接

https://leetcode.cn/problems/single-number/description/

题解

思路

与或运算

js

/**
 * @param {number[]} nums
 * @return {number}
 */
var singleNumber = function (nums) {
  let ret = 0;

  for (const item of nums) {
    ret ^= item;
  }

  return ret;
};

/**
 * @param {number[]} nums
 * @return {number}
 */
var singleNumber = function (nums) {
  let ret = 0;

  for (const item of nums) {
    ret ^= item;
  }

  return ret;
};