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@essic essic/main.fs
Created Jun 19, 2018

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SimpleFSharpDemo-04 created by essic - https://repl.it/@essic/SimpleFSharpDemo-04
module Implem04
open System
type Age = int
type FirstName = string
type LastName = string
type Person =
{ FirstName : FirstName
LastName : LastName
Age : Age }
type ConsultantSkills =
| CSharp
| FSharp
| Java
| Finance
| ECommerce
type ManagerBU =
| SGCIB
| Natixis
| BNP
type Collaborator =
| Consultant of Person * (ConsultantSkills list)
| Manager of Person * ManagerBU
let isNull a =
a |> List.fold (fun state str -> state || String.IsNullOrWhiteSpace(str) ) false
let createPerson firstName lastName age =
if ( age < 0 ) || (isNull [firstName; lastName]) then
None
else
{ FirstName = firstName ; LastName = lastName ; Age = age } |> Some
let createConsultant firstName lastName age skills =
createPerson firstName lastName age
|> Option.map (fun person -> Consultant (person,skills) )
let createManager firstName lastName age bu =
createPerson firstName lastName age
|> Option.map (fun person -> Manager (person,bu))
let whoAreYou collaborator =
match collaborator with
| Consultant (p,_) -> printfn "I am a %i years old, consultant. My name is %s %s" p.Age p.FirstName p.LastName
| Manager (p,_) -> printfn "I am a %i years old, manager. My name is %s %s" p.Age p.FirstName p.LastName
collaborator
let whatDoYouDo collaborator =
match collaborator with
| Manager (_,businessUnit) -> printfn "I handle business on %s" <| sprintf "%A" businessUnit
| Consultant (_,skills) ->
match skills with
| [] -> printfn "I have no skills yet !" // I handle the case where skills is an empty list !
| _ -> // For any other case !
let skillsString = List.reduce (fun acc elem -> acc + ", " + elem) ( skills |> List.map (sprintf "%A") )
printfn "I work on %s" skillsString
collaborator
let customPrint collaborator =
printfn "***********************"
collaborator
|> (whoAreYou >> whatDoYouDo) |> ignore
printfn "***********************"
[<EntryPoint>]
let main argv =
let createConsultant' skills (firstName,lastName,age) =
createConsultant firstName lastName age skills
let createCsharpConsultant = createConsultant' [CSharp]
// We create some collaborators with C# skills
[
"Patrick","Sebastien",30
"Julien","LePasBeau", 40
"Foo","Bar",25
]
|> List.map (fun info -> createCsharpConsultant info )
|> List.iter (Option.map customPrint >> ignore)
0
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