From 7fab6e42fb986b1d66a6ab9cdf822f429224a3d3 Mon Sep 17 00:00:00 2001
From: Eduardo Julian
Date: Mon, 3 Dec 2018 23:35:02 -0400
Subject: Excised contribution relevant to this:
 https://github.com/LuxLang/lux/pull/35

---
 stdlib/source/lux/math/random.lux    | 21 ---------------------
 stdlib/test/test/lux/math/random.lux | 11 +----------
 2 files changed, 1 insertion(+), 31 deletions(-)

diff --git a/stdlib/source/lux/math/random.lux b/stdlib/source/lux/math/random.lux
index ffb7bc592..b73e7df02 100644
--- a/stdlib/source/lux/math/random.lux
+++ b/stdlib/source/lux/math/random.lux
@@ -293,24 +293,3 @@
                             (i64.xor (i64.left-shift 14 s01)))
                         (i64.rotate-left 36 s01)]))
      ("lux i64 +" s0 s1)]))
-
-(def: (swap from to vec)
-  (All [a] (-> Nat Nat (Row a) (Row a)))
-  (|> vec
-      (row.put to (maybe.assume (row.nth from vec)))
-      (row.put from (maybe.assume (row.nth to vec)))))
-
-(def: #export (shuffle seed row)
-  {#.doc "Shuffle a row randomly based on a seed value."}
-  (All [a] (-> Nat (Row a) (Row a)))
-  (let [_size (row.size row)
-        _shuffle (monad.fold Monad<Random>
-                             (function (_ idx vec)
-                               (do Monad<Random>
-                                 [rand nat]
-                                 (wrap (swap idx (n/% _size rand) vec))))
-                             row
-                             (list.indices _size))]
-    (|> _shuffle
-        (run (pcg-32 [123 seed]))
-        product.right)))
diff --git a/stdlib/test/test/lux/math/random.lux b/stdlib/test/test/lux/math/random.lux
index f3f118c90..a7f126ef3 100644
--- a/stdlib/test/test/lux/math/random.lux
+++ b/stdlib/test/test/lux/math/random.lux
@@ -28,11 +28,7 @@
          _set (r.set number.Hash<Nat> size r.nat)
          _dict (r.dictionary number.Hash<Nat> size r.nat r.nat)
          top r.nat
-         filtered (|> r.nat (r.filter (n/<= top)))
-         shuffle-seed r.nat
-         #let [sorted (|> _row row.to-list (list.sort n/<))
-               shuffled (|> sorted row.from-list (r.shuffle shuffle-seed))
-               re-sorted (|> shuffled row.to-list (list.sort n/<))]]
+         filtered (|> r.nat (r.filter (n/<= top)))]
         ($_ seq
             (test "Can produce lists."
                   (n/= size (list.size _list)))
@@ -50,9 +46,4 @@
                   (n/= size (dict.size _dict)))
             (test "Can filter values."
                   (n/<= top filtered))
-            (test "Can shuffle rows."
-                  (let [(^open "v/.") (row.Equivalence<Row> number.Equivalence<Nat>)
-                        sorted (row.from-list sorted)]
-                    (and (not (v/= sorted shuffled))
-                         (v/= sorted (row.from-list re-sorted)))))
             ))))
-- 
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