题解 | #快速排序#
快速排序
https://www.nowcoder.com/practice/38da660199d0400580ac3905c05f5bd6
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style>
/* 填写样式 */
</style>
</head>
<body>
<!-- 填写标签 -->
<script type="text/javascript">
// 填写JavaScript
const _quickSort = array => {
// 快排 从小到大
if (array.length < 2) return array;
let middleIndex = Math.floor(array.length / 2);
// 该下标所在元素（可能重复）第一个不用判断,不用进入遍历，取出
let middle = array.splice(middleIndex, 1)[0];
let leftArray = [];
let rightArray = [];
for (let i = 0; i < array.length; i++) {
if (array[i] < middle) {
leftArray.push(array[i]);
}else {
rightArray.push(array[i]);
}
}
return [..._quickSort(leftArray), middle,..._quickSort(rightArray)]
}
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style>
/* 填写样式 */
</style>
</head>
<body>
<!-- 填写标签 -->
<script type="text/javascript">
// 填写JavaScript
const _quickSort = array => {
// 快排
return array.sort((a, b) => (a - b));
}
</script>
</body>
</html>
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