F#: how to print full list (Console.WriteLine() prints only first three elements)

Question

Is it possible to print full list without using cycle? I tried:

Console.WriteLine([1;2;3;4;5])

and it prints only three first elements:

Answer 1

In general, if you want to change as a way an printf "%A" prints your objects as a way fsi.exe shows values fo your type, you can apply StructuredFormatDisplayAttribute attribute to your type:

[]
type Foo(a:string array) =
  let pp = Array.mapi (fun i (s: string) -> sprintf "{idx: %d len: %d contents: '%s'}" i s.Length s) a
  member x.PrettyPrinter = pp

> let foo = Foo [|"one";"two";"three"|];;
val foo : Foo =
  PP [|"{idx: 0 len: 3 contents: 'one'}"; "{idx: 1 len: 3 contents: 'two'}";
       "{idx: 2 len: 5 contents: 'three'}"|]

> printfn "%A" foo;;
PP [|"{idx: 0 len: 3 contents: 'one'}"; "{idx: 1 len: 3 contents: 'two'}";
     "{idx: 2 len: 5 contents: 'three'}"|]
val it : unit = ()