对象按照某一属性排序

    let obj=[
      {name:'zhangsan',age:20,score:89},
      {name:'zhaoli',age:20,score:90},
      {name:'lisi',age:21,score:86},
      {name:'wangwu',age:23,score:95},
    ]
    function rank(attr1,attr2) {
     return function (a,b) {
      if (a[attr1]==b[attr1]) return a[attr2]-b[attr2];
      return a[attr1]-b[attr1];
     }
    }
    obj.sort(rank('age'));
    console.log(obj.sort(rank('age','score')));