From cc7a1fe085cd4a507dd92b4e64b26d8b5a146def Mon Sep 17 00:00:00 2001
From: Brandon McConnell <brandon@dreamthinkbuild.com>
Date: Sat, 19 Nov 2022 16:17:47 -0500
Subject: [PATCH] Resolves insertion order mismatch in array-union examples
 (#503)

---
 README.md                      | 2 +-
 md-variables.json              | 2 +-
 packages/array-union/README.md | 2 +-
 packages/array-union/index.js  | 2 +-
 packages/array-union/index.mjs | 2 +-
 test/array-union/index.js      | 8 ++++++++
 6 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index 85f9a6a69..92eccd9f0 100644
--- a/README.md
+++ b/README.md
@@ -1507,7 +1507,7 @@ Returns the union of two arrays
 ```js
 import union from 'just-union';
 
-union([1, 2, 5, 6], [2, 3, 4, 6]); // [1, 2, 3, 4, 5, 6]
+union([1, 2, 5, 6], [2, 3, 4, 6]); // [1, 2, 5, 6, 3, 4]
 ```
 
 ### [just-zip-it](https://www.npmjs.com/package/just-zip-it)
diff --git a/md-variables.json b/md-variables.json
index 8af4bfc01..9153ae298 100644
--- a/md-variables.json
+++ b/md-variables.json
@@ -387,7 +387,7 @@
     "examples": [
       "import union from 'just-union';",
       "",
-      "union([1, 2, 5, 6], [2, 3, 4, 6]); // [1, 2, 3, 4, 5, 6]"
+      "union([1, 2, 5, 6], [2, 3, 4, 6]); // [1, 2, 5, 6, 3, 4]"
     ]
   },
   "just-unique": {
diff --git a/packages/array-union/README.md b/packages/array-union/README.md
index 0f4709020..de20f901c 100644
--- a/packages/array-union/README.md
+++ b/packages/array-union/README.md
@@ -20,5 +20,5 @@ Returns the union of two arrays
 ```js
 import union from 'just-union';
 
-union([1, 2, 5, 6], [2, 3, 4, 6]); // [1, 2, 3, 4, 5, 6]
+union([1, 2, 5, 6], [2, 3, 4, 6]); // [1, 2, 5, 6, 3, 4]
 ```
diff --git a/packages/array-union/index.js b/packages/array-union/index.js
index b5b48577e..e5c4d8389 100644
--- a/packages/array-union/index.js
+++ b/packages/array-union/index.js
@@ -1,7 +1,7 @@
 module.exports = union;
 
 /*
-  union([1, 2, 5, 6], [2, 3, 4, 6]); // [1, 2, 3, 4, 5, 6]
+  union([1, 2, 5, 6], [2, 3, 4, 6]); // [1, 2, 5, 6, 3, 4]
 */
 
 function union(arr1, arr2) {
diff --git a/packages/array-union/index.mjs b/packages/array-union/index.mjs
index fde9daffa..a4ede280d 100644
--- a/packages/array-union/index.mjs
+++ b/packages/array-union/index.mjs
@@ -1,7 +1,7 @@
 var arrayUnion = union;
 
 /*
-  union([1, 2, 5, 6], [2, 3, 4, 6]); // [1, 2, 3, 4, 5, 6]
+  union([1, 2, 5, 6], [2, 3, 4, 6]); // [1, 2, 5, 6, 3, 4]
 */
 
 function union(arr1, arr2) {
diff --git a/test/array-union/index.js b/test/array-union/index.js
index e45b7bc89..1ed6cceb9 100644
--- a/test/array-union/index.js
+++ b/test/array-union/index.js
@@ -25,6 +25,14 @@ test('does not mutate', function(t) {
   t.end();
 });
 
+test('respects insertion order', function(t) {
+  t.plan(1);
+  var arr1 = [1, 2, 5, 6];
+  var arr2 = [2, 3, 4, 6];
+  t.deepEqual(union(arr1, arr2), [1, 2, 5, 6, 3, 4]);
+  t.end();
+});
+
 test("throws if first two arguments aren't arrays", function(t) {
   t.plan(8);
   var arr1 = [1, 2, 3, 4, 5];