mapAsyncForOption

Maps a Option<T> to Option<U> by applying a transformer function to an contained Some(T) value, leaving an None value untouched.

This function can be used to compose the results of two functions.

function mapAsyncForOption<T, U>(input: Option<T>, transformer: AsyncTransformFn<T, U>): Promise<Option<U>>;

mapAsyncForOption<T, U>(input: Option<T>, transformer: AsyncTransformFn<T, U>): Promise<Option<U>>

input: Option<T>

transformer: AsyncTransformFn<T, U>

Promise<Option<U>>