Question

When trying to print

pop

I get all this weird looking formatting in F# interactive, which basically turns the printing useless. Is there someway other to correctly format this?

The code is the following:

#light

open System
let rng = new Random()

type Individual = { x:int; y:int }
type ScoredIndividual = { individual:Individual; score:int }

let genGene() = rng.Next(-10, 10)
let genRandInd() = { x=genGene(); y=genGene() }
let genRandPop popSize = [ for _ in 1 .. popSize -> genRandInd() ]
let getScoredPop f pop = List.map (fun i -> { individual=i; score=(f i)}) pop

let fitnessFun ind = ind.x * ind.x + ind.y * ind.y

let pop = 30 |> genRandPop |> getScoredPop fitnessFun

Answer 1

You can override ToString or use StructuredFormatDisplayAttribute to customize the string representation. This article contains some useful information about customizing output in fsi.