From 2846de2ea39e04cd00ed9564e990bef27a270a98 Mon Sep 17 00:00:00 2001
From: DUznanski <duznanski@gmail.com>
Date: Thu, 20 May 2021 12:33:52 -0700
Subject: [PATCH] Fix shuffle to avoid bias

There's a subtle trick in shuffling: you should draw only from the part of the deck you have not seen!  Otherwise, some permutations are more common than others.
---
 tablex.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tablex.lua b/tablex.lua
index 8af5f35..acc7a85 100644
--- a/tablex.lua
+++ b/tablex.lua
@@ -173,7 +173,7 @@ end
 --shuffle the order of a table
 function tablex.shuffle(t, r)
 	for i = 1, #t do
-		local j = _random(1, #t, r)
+		local j = _random(i, #t, r)
 		t[i], t[j] = t[j], t[i]
 	end
 	return t