經過數組的某一個屬性值進行排序(如id)

 1 let arr = [
 2         {id: 1, name: 'aaa'},
 3         {id: 4, name: 'ddd'},
 4         {id: 2, name: 'bbb'},
 5         {id: 3, name: 'ccc'}
 6  ]
 7   arr.sort((a, b) => {
 8     return (a.id + '') > (b.id + '')? 1 : -1;
 9   })
10   console.log(arr) // 獲得的即爲經過id排序好的