javascript数组排序函数

1. 代码：

   /*
   @desc：表格排序类
   @param data 待排序数组
   */
   function tablesort(data){
   this.data = data
   this.sortby = true
   /*
    @desc：主方法，排序
    @param item 排序字段
    @return ret 排序后的数据
    */
   this.sort = function(item){
       if(this.sortby){
           var ret = this.data.sort(function(a,b){
               return a[item]>b[item]
           })
       }else{
           var ret = this.data.sort(function(a,b){
               return a[item]<b[item]
           })
       }
       this.sortby = !this.sortby
       return ret
   }
   }

2. 测试：

   var data = new Array(
    {
        id:1,
        title:'title1',
        content:'content1'
    },
    {
        id:3,
        title:'title2',
        content:'content3'
    },
    {
        id:2,
        title:'title3',
        content:'content2'
    }
   )
   var tablesort = new tablesort(data)
   var ret = tablesort.sort('id')
   console.log(ret)
   var ret = tablesort.sort('title')
   console.log(ret)
   var ret = tablesort.sort('id')
   console.log(ret)

3. 输出：

   [ { id: 1, title: 'title1', content: 'content1' },
   { id: 2, title: 'title3', content: 'content2' },
   { id: 3, title: 'title2', content: 'content3' } ]
   [ { id: 2, title: 'title3', content: 'content2' },
   { id: 3, title: 'title2', content: 'content3' },
   { id: 1, title: 'title1', content: 'content1' } ]
   [ { id: 1, title: 'title1', content: 'content1' },
   { id: 2, title: 'title3', content: 'content2' },
   { id: 3, title: 'title2', content: 'content3' } ]