js实现json格式数据排序代码实例

<script>
var sortBy=function (filed,rev,primer){
  rev = (rev) ? -1 : 1;
  return function (a, b) {
    a = a[filed];
    b = b[filed];
    if (typeof (primer) != 'undefined') {
      a = primer(a);
      b = primer(b);
    }
    if (a < b) { return rev * -1; }
    if (a > b) { return rev * 1; }
    return 1;
  }
};
var obj=[
  {b: '3', c: 'c'}, 
  {b: '1', c: 'a'},
  {b: '2', c: 'b'}
];
obj.sort(sortBy('b',false,parseInt));
console.log(obj);
</script>