Result.orElse
Namespace: FsToolkit.ErrorHandling
Returns the result if the result is Ok, otherwise returns the given result
Function Signature
Result<'ok, 'errorOutput> -> Result<'ok, 'error>
-> Result<'ok, 'errorOutput>
Examples
Example 1
let result : Result<int, string> =
Ok 1
|> Result.orElse (Ok 2)
// Ok 1
Example 2
let result : Result<int, string> =
Ok 1
|> Result.orElse (Error "Error")
// Ok 1
Example 3
let result : Result<int, string> =
Error "Error"
|> Result.orElse (Ok 2)
// Ok 2
Example 4
let result : Result<int, string> =
Error "Error"
|> Result.orElse (Error "Error 2")
// Error "Error 2"
Result.orElseWith
Namespace: FsToolkit.ErrorHandling
Returns the result if the result is Ok, otherwise evaluates the given function and returns the result.
Function Signature
('error -> Result<'ok, 'errorOutput>) -> Result<'ok, 'error>
-> Result<'ok, 'errorOutput>
Examples
Example 1
let result : Result<int, int> =
Ok 1
|> Result.orElseWith (fun e -> e + 1 |> Ok)
// Ok 1
Example 2
let result : Result<int, int> =
Ok 1
|> Result.orElseWith (fun e -> e + 1 |> Error)
// Ok 1
Example 3
let result : Result<int, int> =
Error 1
|> Result.orElseWith (fun e -> e + 1 |> Ok)
// Ok 2
Example 4
let result : Result<int, int> =
Error 1
|> Result.orElseWith (fun e -> e + 1 |> Error)
// Error 2
