利用数组api ——> sort来进行排序

var person = [
  {name:"Rom",age:12},
  {name:"Bob",age:22},
  {name:"Ma",age:5},
  {name:"Tony",age:25}
]


person.sort((a,b)=>{ return a.age-b.age})//升序

person.sort((a,b)=>{ return b.age-a.age})//降序