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This article mainly shares with you JS to implement simple sorting, including bubble sorting and selection sorting. I hope it can help everyone.
1. Bubble sorting: compare two adjacent elements in sequence, exchange sizes
var arr = [3, 5, 15, 36, 36, 27, 2, 38]; //冒泡排序 function bubbleSort(arr) { var len = arr.length; for (var i = 0; i < len - 1; i++) { for (var j = 0; j < len - 1 - i; j++) { if (arr[j] > arr[j + 1]) { var temp = arr[j + 1]; arr[j + 1] = arr[j]; arr[j] = temp; } } } //return arr; } bubbleSort(arr); for (var i = 0; i < arr.length; i++) { alert(arr[i]); }
2. Selection sorting: select the most valuable element, Put it first, and then continue to select the best value among the remaining elements.
//选择排序 var arr = [3, 5, 15, 36, 36, 27, 2, 38]; function selectSort(arr) { var len = arr.length; var minIndex, temp; for (var i = 0; i < len - 1; i++) { minIndex = i; for (var j = i + 1; j < len; j++) { //寻找最小的值,保存索引 if (arr[j] < arr[minIndex]) { minIndex = j; } } temp = arr[i]; arr[i] = arr[minIndex]; arr[minIndex] = temp; } } selectSort(arr); for (var i = 0; i < arr.length; i++) { alert(arr[i]); }
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