問題 https://leetcode-cn.com/problems/remove-element/
練習使用JavaScript解答
/**
* @param {number[]} nums
* @param {number} val
* @return {number}
*/
var removeElement = function(nums, val) {
var i,j;
for(i=0,j=0;i<nums.length;++i)
if(nums[i] != val)
nums[j++] = nums[i];
return j;
};