``` var array1 = [ {"Num": "A " }, {"Num": "B" } ]; var array2 = [ {"Num": "A ","Name": "t1 " }, {"Num": "B","Name": "t2"}, {"Num": "C " ,"Name": "t3 ",age:'222'}, {"Num": "D" ,"Name": "t4 ",age:'3333'} ]; var result = []; for(var i = 0; i < array2.length; i++){ var obj = array2[i]; var num = obj.Num; var isExist = false; for(var j = 0; j < array1.length; j++){ var aj = array1[j]; var n = aj.Num; if(n == num){ isExist = true; break; } } if(!isExist){ result.push(obj); } } console.log(result); ```