/**
  * 排序数组或者对象
  * by Jinko
  * date --
  * @param object 数组或对象
  * @param subkey 需要排序的子键, 该参数可以是字符串, 也可以是一个数组
  * @param desc 排序方式, true:降序, false|undefined:升序
  * @returns {*} 返回排序后的数组或者对象
  *
  * 注意: 对于对象的排序, 如果使用console.log打印对象的显示可能和排序结果不一致,
  *  其键会被浏览器以字母顺序排序显示,但在for循环中则为正确的排序顺序
  */
 function sort_object(object, subkey, desc)
 {
   var is_array = false;
   if(Object.prototype.toString.call(object) === '[object Array]') {
     is_array = true;
   }
   if(is_array) {
     var keys = {length:object.length};
   } else {
     if(typeof(Object.keys) == 'function') {
       var keys = Object.keys(object);
     } else{
       var keys = [];
       for(var key in keys) {
         keys.push(key);
       }
     }
   }
   for(var i=; i<keys.length; i++) {
     for(var j=i+; j<keys.length; j++) {
       if(is_array) {
         //数组排序
         if(Object.prototype.toString.call(subkey) === '[object Array]') {
           var vali = object[i];
           var valj = object[j];
           for(var si=; si<subkey.length; si++) {
             vali = vali[ subkey[si] ];
             valj = valj[ subkey[si] ];
           }
         } else {
           if((!subkey && subkey !== ) || subkey == '' && object.sort) {
             var vali = object[i];
             var valj = object[j];
           } else {
             var vali = object[i][subkey];
             var valj = object[j][subkey];
           }
         }
         if(desc) {
           if(valj > vali) {
             var tmp = object[i];
             object[i] = object[j];
             object[j] = tmp;
           }
         } else {
           if(valj < vali) {
             var tmp = object[i];
             object[i] = object[j];
             object[j] = tmp;
           }
         }
       } else {
         //对象排序
         var obi = object[ keys[i] ];
         var obj = object[ keys[j] ];
         if(Object.prototype.toString.call(subkey) === '[object Array]') {
           var vali = obi;
           var valj = obj;
           for(var si=; si<subkey.length; si++) {
             vali = vali[ subkey[si] ];
             valj = valj[ subkey[si] ];
           }
         } else {
           if((!subkey && subkey !== ) || subkey == '' && object.sort) {
             var vali = obi;
             var valj = obj;
           } else {
             var vali = obi[subkey];
             var valj = obj[subkey];
           }
         }
         if(desc) {
           if(valj > vali) {
             var tmp = keys[i];
             keys[i] = keys[j];
             keys[j] = tmp;
           }
         } else {
           if(valj < vali) {
             var tmp = keys[i];
             keys[i] = keys[j];
             keys[j] = tmp;
           }
         }
       }//is!array
     }
   }
   if(is_array) {
     return object;
   } else {
     var sorted = {};
     for(var i=; i<keys.length; i++) {
       sorted[ keys[i] ] = object[ keys[i] ];
     }
     return sorted;
   }
 } //sort_object 

 var data = {
   "a": {
     "session_offline": ,
     "session_online": ,
     "session_count": 
   },
   "b": {
     "session_offline": ,
     "session_online": ,
     "session_count": 
   },
   "c": {
     "session_offline": ,
     "session_online": ,
     "session_count": 
   },
   "d": {
     "session_offline": ,
     "session_online": ,
     "session_count": 
   }
 };
 //根据session_online字段升序排序
 data = sort_object(data, 'session_online');
 for(var k in data) {
   console.log(data[k]);
 }
 console.log('------------------');
 //根据session_offline字段降序排序
 data = sort_object(data, 'session_offline', true);
 for(var k in data) {
   console.log(data[k]);
 } 

var data = [
   {
     "cpu": ,
     "cpuhz": ,
     "cpuhz_use": ,
   },
   {
     "cpu": ,
     "cpuhz": ,
     "cpuhz_use": ,
   },
   {
     "cpu": ,
     "cpuhz": ,
     "cpuhz_use": ,
   },
   {
     "cpu": ,
     "cpuhz": ,
     "cpuhz_use": ,
   }
 ];
 //根据cpuhz_use字段进行排序
 data = sort_object(data, 'cpuhz_use');
 console.log(data); 

 var data = [,,,,,,,];
 //对一维数组进行升序排序
 data = sort_object(data);
 console.log(data);
 //对一维数组进行降序排序
 data = sort_object(data, null, true);
 console.log(data); 

 var data = {'a':, 'b':, 'c':, 'd':};
 //对对象进行升序排序
 data = sort_object(data);
 //对对象进行降序排序
 data = sort_object(data, '', true);
 for(var k in data) {
   console.log(k, ':', data[k]);
 } 

 var data = {
   "l_": {
     "l": {
       "l": 
     }
   },
   "l_": {
     "l": {
       "l": 
     }
   },
   "l_": {
     "l": {
       "l": 
     }
   },
   "l_": {
     "l": {
       "l": 
     }
   }
 };
 //对对象元素的l下的l的值为基础进行升序排序
 data = sort_object(data, ['l', 'l']);
 for(var k in data) {
   console.log(data[k].l);
 } 

var data = [
   [
     {
       "a": 
     },
     ,
   ],
   [
     {
       "a": 
     },
     ,
   ],
   [
     {
       "a": 
     },
     ,
   ]
 ];
 //对数组的元素以下标为的元素的键名为a的值为基础进行升序排序
 data = sort_object(data, [,'a']);
 for(var k = ; k<data.length; k++) {
   console.log(data[k]);
 }
 console.log('---------------------');
 //对数组的元素以下标为的元素的值为基础进行升序排序
 data = sort_object(data, []); // 等价于 data = sort_object(data, );
 for(var k = ; k<data.length; k++) {
   console.log(data[k]);
 }