leetcode/algorithms/move-zeroes.js at main · w2xi/leetcode · GitHub

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/**
 * @param {number[]} nums
 * @return {void} Do not return anything, modify nums in-place instead.
 */
var moveZeroes = function (nums) {
  // 双指针 (二刷的写法)

  let slowIndex = 0;

  for (let fastIndex = 1; fastIndex < nums.length; fastIndex++) {
    if (nums[slowIndex] === 0) {
      if (nums[fastIndex] !== 0) {
        swap(nums, slowIndex++, fastIndex);
      }
    } else {
      slowIndex++;
    }
  }

  // let index = 0;

  // for (let i = 0; i < nums.length; i++) {
  //   if (nums[i] !== 0) {
  //     nums[index] = nums[i];
  //     index++;
  //   }
  // }
  // for (let i = index; i < nums.length; i++) {
  //   nums[i] = 0;
  // }

  // 双指针

  // let slow = 0;
  // let fast = 0;

  // while (fast < nums.length) {
  //   if (nums[fast] !== 0) {
  //     swap(nums, slow, fast);
  //     slow++;
  //   }
  //   fast++;
  // }
};