会改变原数组

    1.     <script>
    2.         var arr = [4,6,2,9,3,5,6,14];
    3.         var arr2 = [4,6,2,9,3,5,6,14];
    5.         // 升序算法
    6.         var a=arr.sort((a,b)=> {
    7.             return a-b;
    8.         })
    9.         // 降序算法
    10.         var b=arr2.sort((a,b)=> {
    11.             return b-a;
    12.         })
    13.         console.log(...a);
    14.         console.log(...arr);
    15.         console.log(...b);
    16.     </script>

    封装示例

    1. <!-- 封装示例 -->
    2. <script>
    3.     var students =[
    4.         {"name":"zhang","age":"18","height":180},
    5.         {"name":"li","age":"19","height":170},
    6.         {"name":"wang","age":"14","height":200}
    7.     ]
    8.     console.log(...students);
    10.         // 升序
    11.         function addOrder(arr,value){
    12.             var res = arr.sort((a,b)=>{
    13.             return a[value]-b[value];          
    14.         })
    15.             return res;
    16.         }
    17.         // 降速
    18.         function rdcOrder(arr,value){
    19.             var res = arr.sort((a,b)=>{
    20.             return b[value]-a[value];          
    21.         })
    22.             return res;
    23.         }
    24.         // 按照age排序
    25.         console.log(...addOrder(students,"age"));
    26.         console.log(...rdcOrder(students,"age"));
    27.         // 按照height排序
    28.         console.log(...addOrder(students,"height"));
    29.         console.log(...rdcOrder(students,"height"));
    30. </script>