JS implements simple sorting

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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php simple sorting bubble sort and selection sort

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