Function map

map<T, U>(iterable, f): AsyncIterable<U>
The equivalent of Array.prototype.map for async iterators.
Type Parameters
- T
- U
Parameters
- iterable: AsyncIterable<T, any, any>
  The async iterable to map over.
- f: ((x: T, index?: number) => U | PromiseLike<U>)
  The mapping function.
  - - (x, index?): U | PromiseLike<U>
    - Parameters
      x: T
      Optionalindex: number
      Returns U | PromiseLike<U>
Returns AsyncIterable<U>