apply

Namespace: FsToolkit.ErrorHandling

Function Signature:

CancellableTask<('a -> 'b) option> -> CancellableTask<'a option> -> CancellableTask<'b option>

Examples

Take the following function for example

// string -> int
let characterCount (s: string) = s.Length

Example 1

let result =
    CancellableTaskOption.some "foo" // CancellableTask<string option>
    |> CancellableTaskOption.apply (CancellableTaskOption.some characterCount) // CancellableTask<int option>

// cancellableTask { Some 3 }

Example 2

let result =
    CancellableTask.singleton None // CancellableTask<string option>
    |> CancellableTaskOption.apply (CancellableTaskOption.some characterCount) // CancellableTask<int option>

// cancellableTask { None }

Example 3

let result : CancellableTask<int option> =
    CancellableTaskOption.some "foo" // CancellableTask<string option>
    |> CancellableTaskOption.apply (CancellableTask.singleton None) // CancellableTask<int option>

// cancellableTask { None }