1  function getDistinct(arr1,arr2){
 2         var arr=[];
 3         for(var i=0;i<arr1.length;i++){
 4             var obj1=arr1[i].id
 5             var isExist = false;
 6             for (var j=0;j<arr2.length;j++){
 7                 var obj2=arr2[j].id
 8                 if(obj1==obj2){
 9                     isExist = true;
10                     break;
11                 }
12             }
13             if(!isExist){
14                 arr.push(obj1)
15             }
16         }
17         return arr;
18     }
19     var arr1=[
20         {
21             'id':1
22         },
23         {
24             'id':2
25         },
26         {
27             'id':3
28         }
29     ]
30     var arr2=[
31         {
32             'id':1
33         },
34         {
35             'id':2
36         }
37     ]
38     var arr3=getDistinct(arr1,arr2);
39     console.log(arr3,'arr3')  //[3]