How to implement twice function (function that executes other function twice)? Could not match type Record with type Function Int

Question

Here is the code

module Main where

import Prelude

twice1 f = f . f

transform :: Int -> Int
transform n = n + 1

apply1 x = (twice1 transform) x

I have an error

  Could not match type

    Record

  with type

    Function Int

What's wrong? (you can try code here http://try.purescript.org)

Answer 1

PureScript uses the dot . for accessing record fields, as in:

r = { a: 42, b: "what?!" }
fourtyTwo = r.a

The function composition operator in PureScript is <<< (or >>> for left-to-right composition), for example:

twice1 f = f <<< f