This is why I love F#.

This is why I love F# (and functional programming in general). How could possibly state something so elegantly in any other type of language?

// This code is presented "as-is" and without warranty 

// or implied fitness of any kind; use at your own risk.

// A moving average on a sequence.

let movingAvg n s =

  s |> Seq.windowed n 

    |> Seq.map Array.sum 

    |> Seq.map (fun a->a/n) 

// Currying for the pure joy of it.

let movingAvg3 = movingAvg 3

let r = new System.Random()

// For test purposes, the input sequences are 

// based on lists so they can be easily examined...

let l0 = [ for i in 0..9 do yield i ]

let l1 = [ for i in 0..9 do yield r.Next(100) ]

// ...and the output sequences are converted to lists

// for the same reason.

let x0 = movingAvg3 l0 |> Seq.toList 

let x1 = movingAvg3 l1 |> Seq.toList