js数组的sort排序详解

来源：互联网发布：软件测试技术维护编辑：程序博客网时间：2024/05/15 12:46

sort()对数组排序，不开辟新的内存，对原有数组元素进行调换

1、简单数组简单排序

<script type="text/javascript">    var arrSimple=new Array(1,8,7,6);    arrSimple.sort();    document.writeln(arrSimple.join());</script>

2、简单数组自定义排序

<script type="text/javascript">    var arrSimple2=new Array(1,8,7,6);    arrSimple2.sort(function(a,b){       return b-a});    document.writeln(arrSimple2.join());</script>

简化一下：a-b输出从小到大排序，b-a输出从大到小排序。

3、简单对象List自定义属性排序

<script type="text/javascript">    var objectList = new Array();    function Persion(name,age){       this.name=name;       this.age=age;    }    objectList.push(new Persion('jack',20));    objectList.push(new Persion('tony',25));    objectList.push(new Persion('stone',26));    objectList.push(new Persion('mandy',23));    //按年龄从小到大排序    objectList.sort(function(a,b){        return a.age-b.age});    for(var i=0;i<objectList.length;i++){        document.writeln('<br />age:'+objectList[i].age+' name:'+objectList[i].name);    }</script>

4、简单对象List对可编辑属性的排序

<script type="text/javascript">        var objectList2 = new Array();        function WorkMate(name,age){            this.name=name;            var _age=age;            this.age=function(){                if(!arguments)                {                    _age=arguments[0];}                else                {                    return _age;}                }                            }        objectList2.push(new WorkMate('jack',20));        objectList2.push(new WorkMate('tony',25));        objectList2.push(new WorkMate('stone',26));        objectList2.push(new WorkMate('mandy',23));        //按年龄从小到大排序        objectList2.sort(function(a,b){            return a.age()-b.age();            });        for(var i=0;i<objectList2.length;i++){            document.writeln('<br />age:'+objectList2[i].age()+' name:'+objectList2[i].name);            }    </script>

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