代码：
javascript"><!DOCTYPE html>
<html lang="zh-CN"><head><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>Document</title></head><body><script>var arr3 = [10, 0, 20, 0, 30, 0, 40, 0, 50];console.log("原数组为：");console.log(arr3);// 开关let derail = true;let newarr = [];let k = 0;//保留一个0，并排序arr3.sort(function (a, b) {return a - b;});for (let i = 0; i < arr3.length; i++) {for (let j = 0; j < newarr.length; j++) {if (arr3[i] === newarr[j]) {derail = false;break;} else {derail = true;}}if (derail === true) {newarr[k] = arr3[i];k++;}}console.log("去掉重复的0：");console.log(newarr);// 不保留0，并排序arr3.sort(function (a, b) {return a - b;});for (var i = 0; i < arr3.length; i++) {if (arr3[i] == 0) {arr3.shift();i--;}}console.log("去掉全部0：");console.log(arr3);</script></body>
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效果图：
