I have an array of objects. For all the objects inside that array, i have to execute a series of function and that result should be sent back to callee. I want to execute these functions for those objects sequentially or paralleled without waiting for the result.

for example:
I have 

```js
const arr = [{...},{...},{...},...{...}];
function exeArr(obj) {
  function f1(){...},
  function f2(){...}
  return result
}

```