F # - Convert Int option to Int64 option

Question

Is there a better way how to do this?

let intOption = Some(123) 
let longOption = match intOption with
                   | Some x -> Some(int64 x )
                   | None   -> None

I need to convert option of int

to option of int64

.

+3

Alamakanambra 04 june 17 at 12:35

2 answers

The function you are looking for is Option.map

:

let longOption = Option.map int64 intOption

+3

Vandroiy 04 june 17 at 12:43

TheQuickBrownFox · Accepted Answer · 2017-06-04T12:43:57+0000

Option.map

does exactly what you need.

intOption |> Option.map int64