题解 | #数组排序#

数组排序

https://www.nowcoder.com/practice/18ea36ef9b0c470e9db7681eced6e8df

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
    </head>
    <body>
        <button class='up' onclick="up()">销量升序</button>
        <button class='down' onclick="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
            initUl(cups);
            function initUl(initArr) {
                for(let i = 0; i < initArr.length; i++) {
                    let liEl = document.createElement('li');
                    liEl.innerHTML = initArr[i].name;
                    ul.appendChild(liEl)
                }
            }
            
            function up() {
                ul.innerHTML = '';
                for(let i = 0; i < cups.length; i++) {
                    for(let j = i+1; j < cups.length; j++) {
                        if (cups[i].sales > cups[j].sales) {
                            let temp = cups[i];
                            cups[i] = cups[j];
                            cups[j] = temp;
                        }
                    }
                };
                initUl(cups);
            }
            
            function down() {
                ul.innerHTML = '';
                for(let i = 0; i < cups.length; i++) {
                    for(let j = i+1; j < cups.length; j++) {
                        if (cups[i].sales < cups[j].sales) {
                            let temp = cups[i];
                            cups[i] = cups[j];
                            cups[j] = temp;
                        }
                    }
                };
                initUl(cups);
            }
        </script>
    </body>
</html>