foldResult

AsyncResult.foldResult
Namespace: FsToolkit.ErrorHandling
Function Signature:
('a -> 'b) -> ('c -> 'b) -> Async<Result<'a, 'c>> -> Async<'b>
This is just a shortcut for Async.map Result.fold. See Result.fold for more.
Examples
Example 1
type HttpResponse<'a, 'b> =
  | OK of 'a
  | InternalError of 'b
​
// CreatePostRequest -> Async<Result<PostId, exn>>
let createPost (req : CreatePostRequest) = async {
  // ...
}
​
// Async<HttpResponse>
let handler (httpReq : HttpRequest) = 
  // ... 
  
  // Async<Result<PostId, exn>>
  let createPostAR = createPost httpReq
​
  createPostAR
  |> AsyncResult.fold Ok InternalError

Computation Expression

ignore

Last modified 2yr ago