bind

JobResultOption.bind

Namespace: FsToolkit.ErrorHandling

Function Signature:

('a -> Job<Result<'b option, 'c>>)
  -> Job<Result<'a option, 'c>>
  -> Job<Result<'b option, 'c>>

Examples

Note: Many use-cases requiring bind can also be solved using the jobResultOption computation expression.

Example 1

Given the following functions:

getUserById : UserId -> Job<Result<User option, exn>>
getPostById : PostId -> Job<Result<Post option, exn>>

We can get a post's user given a PostId like this:

// Job<Result<User option, exn>>
getPostById postId
|> JobResultOption.bind (fun post -> getUserById post.UserId)

Example 2

tryFindConfig : string -> Job<Result<Config option, string>>
tryLoadData : Config -> Job<Result<Data option, string>>

// Job<Result<Data option, string>>
tryFindConfig "app.json"
|> JobResultOption.bind tryLoadData