Stylish F# by Kit Eason

Author:Kit Eason
Language: eng
Format: epub
ISBN: 9781484240007
Publisher: Apress

type ConsolePrompt(message : string, beepOnError : bool) =

do

if String.IsNullOrWhiteSpace(message) then

raise <| ArgumentException("Null or empty", "message")

let message = message.Trim()

new (message : string) =

ConsolePrompt(message, true)

member this.GetValue() =

printfn "%s:" message

let input = Console.ReadLine()

if not (String.IsNullOrWhiteSpace(input)) then

input

else

if beepOnError then

Console.Beep()

this.GetValue()

let demo() =

let first = ConsolePrompt("First name", false)

let last = ConsolePrompt("Second name")

// No beep on invalid input!

let firstName = first.GetValue()

// Beep on invalid input!

let lastName = last.GetValue()

printfn "Hello %s %s" firstName lastName

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