``` var arr1 = [{ id: 12, name: 20 }, { id: 13, name: 30 }]; var arr2 = [{ id: 12, title: 500 }, { id: 13, title: 666 }]; var sum = []; for (var i = 0; i < arr1.length; i++) { var obj = { id: arr1[i].id, name: arr1[i].name, title: arr2[i].title }; sum.push(obj); } console.log(sum); ```