js排序的几个常用方法

var arr = [{
            age: 12,
            name: 111
        }, {
            age: 28,
            name: 222
        }, {
            age: 97,
            name: 333
        }, {
            age: 567,
            name: 444
        }, {
            age: 7,
            name: 555
        }, {
            age: 182,
            name: 666
        }];

js自带sort方法排序

arr.sort(function(s1,s2){
    return s1.age-s2.age;
})

快速排序

function sort(arr) {
    if (arr.length <= 1) {
        return arr;
    }
    var text = arr[0].age;
    var leftArr = [];
    var rightArr = [];
    for (var i = 1; i < arr.length; i++) {
        if (arr[i].age < text) {
            leftArr.push(arr[i]);
        } else {
            rightArr.push(arr[i]);
        }
    }
    return sort(leftArr).concat([arr[0]], sort(rightArr));
}

冒泡排序

function sort(arr) {
	var len = arr.length;
	var current = null;
    for (var i = 0; i < len - 1; i++) {
        for (var j = 0; j < len - i - 1; j++) {
            if (arr[j].age > arr[j + 1].age) {
                current  = arr[j + 1];
                arr[j + 1] = arr[j];
                arr[j] = current ;
            }
        }
    }
    return arr;
}

选择排序

//选择排序
function sort(arr) {
    var len = arr.length;
    var index = 0;
    for (var i = 0; i < len - 1; i++) {
        index = i;
        for (var j = i + 1; j < len; j++) {
            if (arr[index].age > arr[j].age) {//寻找最小值
                index = j;//保存最小值的索引
            }
        }
        if (index !== i) {
            var temp = arr[i];
            arr[i] = arr[index];
            arr[index] = temp;
        }
    }
    return arr;
}