map.md

TaskOption.map

Namespace: FsToolkit.ErrorHandling

Apply a function to the value of a task option if it is Some. If the option is None, return None.

Function Signature

('input -> 'output) -> Task<'input option> -> Task<'output option>

Examples

Example 1

TaskOption.map (fun x -> x + 1) (TaskOption.some 1)

// task { Some 2 }

Example 2

TaskOption.map (fun x -> x + 1) (Task.singleton None)

// task { None }