map.md

JobOption.map

Namespace: FsToolkit.ErrorHandling

Function Signature:

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

Examples

Note: Many use-cases requiring map operations can also be solved using the jobOption computation expression.

Example 1

Given the function

tryFindPersonById : int -> Job<Person option>

We can get the name of the person like this:

// Job<string option>
tryFindPersonById 42
|> JobOption.map (fun person -> person.Name)

Example 2

let maybeValue : Job<int option> = Job.singleton (Some 10)

maybeValue
|> JobOption.map (fun x -> x * 2)
// job { return Some 20 }