对象

1.深克隆

/*
 * 深度合并对象
 */
function deepAssign(FirstOBJ, SecondOBJ) {
  if (!typeof FirstOBJ == 'object' && typeof SecondOBJ == 'object') return;
  for (var key in SecondOBJ) {
    FirstOBJ[key] = FirstOBJ[key] && FirstOBJ[key].toString() === '[object Object]' ? deepAssign(FirstOBJ[key], SecondOBJ[key]) : (FirstOBJ[key] = SecondOBJ[key]);
  }
  return FirstOBJ;
}