From ee6456515c6b5e92d1c2d44132b1264efac04a4a Mon Sep 17 00:00:00 2001
From: simov <simeonvelichkov@gmail.com>
Date: Sun, 11 Feb 2018 15:56:19 +0200
Subject: [PATCH] Shorter stableSort example and test

---
 snippets/stableSort.md             | 41 +++---------------------------
 test/stableSort/stableSort.test.js | 40 +++--------------------------
 2 files changed, 8 insertions(+), 73 deletions(-)

diff --git a/snippets/stableSort.md b/snippets/stableSort.md
index ebcffd72b..b14535e73 100644
--- a/snippets/stableSort.md
+++ b/snippets/stableSort.md
@@ -14,40 +14,7 @@ const stableSort = (arr, compare) =>
 ```
 
 ```js
-// sorted by weight
-const input = [
-  { height: 100, weight: 80 },
-  { height: 90, weight: 90 },
-  { height: 70, weight: 95 },
-  { height: 100, weight: 100 },
-  { height: 80, weight: 110 },
-  { height: 110, weight: 115 },
-  { height: 100, weight: 120 },
-  { height: 70, weight: 125 },
-  { height: 70, weight: 130 },
-  { height: 100, weight: 135 },
-  { height: 75, weight: 140 },
-  { height: 70, weight: 140 }
-];
-
-// sort by height
-stableSort(input, (a, b) => a.height - b.height);
-
-/*
-  Items with the same height are still sorted by weight
-  which means they preserved their relative order.
-  [
-    { height: 70, weight: 95 },
-    { height: 70, weight: 125 },
-    { height: 70, weight: 130 },
-    { height: 70, weight: 140 },
-    { height: 75, weight: 140 },
-    { height: 80, weight: 110 },
-    { height: 90, weight: 90 },
-    { height: 100, weight: 80 },
-    { height: 100, weight: 100 },
-    { height: 100, weight: 120 },
-    { height: 100, weight: 135 },
-    { height: 110, weight: 115 }
-  ]
-*/
+const arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+const stable = stableSort(arr, () => 0); // [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+const unstable = [...arr].sort(() => 0); // [5, 0, 2, 3, 4, 1, 6, 7, 8, 9, 10] (in Chrome/NodeJS)
+```
diff --git a/test/stableSort/stableSort.test.js b/test/stableSort/stableSort.test.js
index cd4a66e9f..28dcbb057 100644
--- a/test/stableSort/stableSort.test.js
+++ b/test/stableSort/stableSort.test.js
@@ -10,44 +10,12 @@ test('Testing stableSort', (t) => {
   //t.false(stableSort(args..), 'Expected');
   //t.throws(stableSort(args..), 'Expected');
   
-  // sorted by weight
-  const input = [
-    { height: 100, weight: 80 },
-    { height: 90, weight: 90 },
-    { height: 70, weight: 95 },
-    { height: 100, weight: 100 },
-    { height: 80, weight: 110 },
-    { height: 110, weight: 115 },
-    { height: 100, weight: 120 },
-    { height: 70, weight: 125 },
-    { height: 70, weight: 130 },
-    { height: 100, weight: 135 },
-    { height: 75, weight: 140 },
-    { height: 70, weight: 140 }
-  ]
-
-  // sorted by height (using stableSort)
-  const target = [
-    { height: 70, weight: 95 },
-    { height: 70, weight: 125 },
-    { height: 70, weight: 130 },
-    { height: 70, weight: 140 },
-    { height: 75, weight: 140 },
-    { height: 80, weight: 110 },
-    { height: 90, weight: 90 },
-    { height: 100, weight: 80 },
-    { height: 100, weight: 100 },
-    { height: 100, weight: 120 },
-    { height: 100, weight: 135 },
-    { height: 110, weight: 115 }
-  ]
-
-  const compare = (a, b) => a.height - b.height;
-
+  const arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+  const compare = () => 0;
   // stable
-  t.deepEqual(stableSort(input, compare), target);
+  t.deepEqual(stableSort(arr, compare), arr);
   // unstable
-  t.notDeepEqual(input.sort(compare), target);
+  t.notDeepEqual([...arr].sort(compare), arr);
 
   t.end();
 });
\ No newline at end of file