js 数组array sort排序实例

<script type="text/javascript">
var arr=[12,1,45,7,44,23];
function sortfunc(a,b){
    return a-b;
}
alert(arr.sort(sortfunc));
</script>

<script type="text/javascript">
function person(name,age,weight,height){
    this.name=name;
    this.age=age;
    this.weight=weight;
    this.height=height;
}
var person1=new person("zhangsan",33,60,170);
var person2=new person("lisi",22,65,175);
var person3=new person("wanger",37,54,179);
var person4=new person("job",15,50,188);
var person5=new person("hikk",24,67,165);
var person6=new person("milo",28,80,172);
var arr=[person1,person2,person3,person4,person5,person6];
function sortbyatt(field){
    var sortfun=function(obj1,obj2){
        if(obj1[field]>obj2[field])return 1;
        else if(obj1[field]==obj2[field])return 0;
        else return -1;
    }
    return sortfun;
}
//arr.sort(sortbyatt("name"));  //按name排序;
//arr.sort(sortbyatt("age"));   //按age排序;
arr.sort(sortbyatt("weight"));  //按weight排序;
//arr.sort(sortbyatt("height")); //按height排序;
for(var i=0;i<arr.length;i++){
    document.write(arr[i].name+"----",arr[i].age+"----",arr[i].weight+"----",arr[i].height+"<br/>");
}
</script>