var array1 = [ {"Num": "A " },{"Num": "B" }];var array2 = [ {"Num": "A ","Name": "t1 " }, {"Num": "B","Name": "t2"}, {"Num": "C " ,"Name": "t3 "}];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);

getArrDifference(arr1, arr2) {return arr1.concat(arr2).filter(function(v, i, arr) {return arr.indexOf(v) === arr.lastIndexOf(v);});}