js数组对象排序

1. 根据年龄大小排序

var arr = [
                   {name: '周一',age: '28'},
                   {name: '周二',age: '18'},
                   {name: '周二',age: '18'},
                   {name: '周二',age: '15'},
                   {name: '周二',age: '25'},
                   {name: '周二',age: '10'},
                 ]

function sortId(a,b){  
    return a.age-b.age 
}
arr.sort(sortId)
console.log(arr)

2.普通数字排序

var arr1 = [15, 8, 25, 3];
arr1.sort();
console.log(arr1);//[15, 25, 3, 8]