function People(name,age){
    this.name = name;
    this.age = age;
}

function Student(age){
    this.age = age;
    People.apply(this,arguments)
}
var stu = new Student(‘liujinyu‘,‘12‘);
var peo = new People(‘liujinyu‘,‘12‘)
console.log( stu)  //{age:"12",name:"liujinyu"}
console.log(peo)   //{name:"liujinyu",age:"12"  }

function peo(name,age){
    console.log(name,age);
}
var arr = [[‘liu‘,‘12‘],[‘jin‘,‘13‘],[‘yu‘,‘14‘]];
$.each(arr,function(i,v){
　　 peo.apply(null,v);
    //peo(v[0],v[1]);   //等同效果
})
//输出结果
//liu 12
//jin 13
//yu 14