map3

Namespace: FsToolkit.ErrorHandling

Apply a function to the values of three options if they are Some. If any option is None, return None.

Function Signature

('TInput1 -> 'TInput2 -> 'TInput3 -> 'TOutput) -> 'TInput1 option -> 'TInput2 option -> 'TInput3 option -> 'TOutput option

Examples

Example 1

Option.map3 (fun x y z -> x + y + z) (Some 1) (Some 2) (Some 3)

// Some 6

Example 2

Option.map3 (fun x y z -> x + y + z) (Some 1) (Some 2) None

// None

Example 3

Option.map3 (fun x y z -> x + y + z) (Some 1) None (Some 3)

// None

Example 4

Option.map3 (fun x y z -> x + y + z) None (Some 2) (Some 3)

// None