题解 | #数组排序#
数组排序
https://www.nowcoder.com/practice/18ea36ef9b0c470e9db7681eced6e8df
<body>
<button class='up'>销量升序</button>
<button class='down'>销量降序</button>
<ul></ul>
<script>
var cups = [
{ type: 1, price: 100, color: 'black', sales: 3000, name: '牛客logo马克杯' },
{ type: 2, price: 40, color: 'blue', sales: 1000, 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 ul = document.querySelector('ul');
var upbtn = document.querySelector('.up');
var downbtn = document.querySelector('.down');
// 补全代码
upbtn.onclick = ()=>{
let arr = cups //临时数组接收数据源，不能直接操作cups，污染全局变量cups
arr = arr.sort((a,b) => a.sales - b.sales).map(v => v.name)
ul.innerHTML = '<li>' + arr.join('</li><li>') + '</li>'
}
downbtn.onclick = ()=>{
let arr = cups
arr = arr.sort((a,b)=> b.sales - a.sales).map(v => v.name)
ul.innerHTML = '<li>' + arr.join('</li><li>') + '</li>'
}
</script>
</body>
#JavaScript##前端##WEB#
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