let testnum testFun =

    testFun 4

​

​

(=) 3 |> testnum |> printfn "result: %b"

​

(=) 4

|> testnum

|> printfn "result: %b"

​

testnum (=) 4 |> printfn "result: %b"

​

​

​

let g x = x + 1

let f x = x * 5

​

1 |> g |> f |> printfn "%i"

g 1 |> f |> printfn "%i"

​

​

​

open System.Linq

​

let double x = x * 2

​

let double1 items = items |> Seq.map double

[1;2;3] |> double1 |> printfn "%A"

​

//this doesn't compile,

//error: Lookup on object of indeterminate type based on information prior to this program point. A type annotation may be needed ..

//

// let double2 items = items.Select(double)

// [1;2;3] |> double2 |> printfn "%A"

​

let double3 (items:seq<_>) = items.Select(double)

[1;2;3] |> double3 |> printfn "%A"

​

​

​

​