map

Namespace: FsToolkit.ErrorHandling

Apply a function to the value of a task voption if it is ValueSome. If the option is ValueNone, return ValueNone.

Function Signature

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

Examples

Example 1

TaskValueOption.map (fun x -> x + 1) (TaskValueOption.valueSome 1)

// task { ValueSome 2 }

Example 2

TaskValueOption.map (fun x -> x + 1) (Task.singleton ValueNone)

// task { ValueNone }