题目
请补全JavaScript代码，要求将数组参数中的多维数组扩展为一维数组并返回该数组。
注意：
1. 数组参数中仅包含数组类型和数字类型
示例1
输入：
[1,[2,[3,[4]]]] 输出： [1,2,3
编辑
核心代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>数组过滤</title> </head> <body> <select name="" id=""> <option value="0">请选择销量范围</option> <option value="1"><100</option> <option value="2">100~500</option> <option value="3">>500</option> </select> <ul> <li>牛客logo马克杯</li> <li>无盖星空杯</li> <li>老式茶杯</li> <li>欧式印花杯</li> </ul> <script>var cups = [{ type: 1, price: 100, color: 'black', sales: 60, name: '牛客logo马克杯' }, { type: 2, price: 40, color: 'blue', sales: 100, name: '无盖星空杯' }, { type: 4, price: 60, color: 'green', sales: 200, name: '老式茶杯' }, { type: 3, price: 50, color: 'green', sales: 600, name: '欧式印花杯' } ] var select = document.querySelector('select'); var ul = document.querySelector('ul'); // 补全代码 var cups = [{ type: 1, price: 100, color: 'black', sales: 60, name: '牛客logo马克杯' }, { type: 2, price: 40, color: 'blue', sales: 100, name: '无盖星空杯' }, { type: 4, price: 60, color: 'green', sales: 200, name: '老式茶杯' }, { type: 3, price: 50, color: 'green', sales: 600, name: '欧式印花杯' } ] var select = document.querySelector('select'); var ul = document.querySelector('ul'); // 补全代码 select.onchange = function () { var index = select.selectedIndex; function show(arr) { let list = ''; arr.forEach(function (v) { list += `<li>${v.name}</li>` }) ul.innerHTML = list; } function choice(cups, index) { let resArr = cups.filter(function (v) { if (index == 1) { return v.sales < 100; } else if (index == 2) { return v.sales >= 100 && v.sales <= 500; } else if (index == 3) { return v.sales > 500; } }) return resArr; } show(choice(cups, index)); } </script> </body> </html>
总结
通过方法的调用实现数据的筛选操作 nice
