sequenceResult

Option.sequenceResult
Namespace: FsToolkit.ErrorHandling
Function Signature:
Result<'a,'b> option -> Result<'a option, 'b>
Note that sequence is the same as traverse id. See also Option.traverseResult.
See also Scott Wlaschin's Understanding traverse and sequence.
Examples
Example 1
let r1 : Result<int option, string> =
  Option.sequenceResult (Some (Ok 42))
// Ok (Some 42)
​
let r2 : Result<int option, string> =
  Option.sequenceResult (Some (Error "something went wrong"))
// Error "something went wrong"
​
let r3 : Result<int option, string> =
  Option.sequenceResult None
// Ok None

traverseResult

Transforms

Last modified 1yr ago