From fd92ba9d8faf209f9d45b112e5dda76b30efd27f Mon Sep 17 00:00:00 2001
From: Tibo De Peuter <tibo.depeuter@ugent.be>
Date: Mon, 14 Nov 2022 18:25:38 +0100
Subject: [PATCH] #9 Polishing shuffle

---
 lib/Shuffle.hs | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/lib/Shuffle.hs b/lib/Shuffle.hs
index 6f349c6..14f8919 100644
--- a/lib/Shuffle.hs
+++ b/lib/Shuffle.hs
@@ -1,12 +1,23 @@
-module Shuffle (
-    shuffle
+module Shuffle
+( shuffle
 ) where
 
 import Data.List
 import System.Random
 
+----------------------------------------------------------------------
+-- Shuffle a list so that the elements of the list are randomly     --
+-- perumated.                                                       --
+----------------------------------------------------------------------
+
+----------------------------- Constants ------------------------------
+
+-- The seed used to generate random numbers.
+seed :: Int
 seed = 20
 
+----------------------------------------------------------------------
+
 -- Shuffle a list of values.
 shuffle :: [a] -> [a]
 shuffle l = map (l !!) $ generateIndices $ length l
@@ -19,6 +30,5 @@ generateIndices size = take size uniqueList
           uniqueList = nub randomList
 
 -- Generate a random generator
--- TODO Écht random maken?
 randomGen :: StdGen
 randomGen = mkStdGen seed