From 0b938bf8080ae09a966378b10963d263429b5181 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tobi=20Sch=C3=A4fer?= <interface@p3k.org>
Date: Sat, 21 Mar 2020 13:13:20 +0100
Subject: [PATCH] chg: refactored and simplified Array.union() method

---
 modules/core/Array.js | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/modules/core/Array.js b/modules/core/Array.js
index e63c20fe..099f3183 100644
--- a/modules/core/Array.js
+++ b/modules/core/Array.js
@@ -38,18 +38,9 @@ Array.prototype.contains = Array.prototype.includes
  * @return {Array} the union set
  */
 Array.union = function() {
-   var result = [];
-   var map = {};
-   for (var i=0; i<arguments.length; i+=1) {
-      for (var n in arguments[i]) {
-         var item = arguments[i][n];
-         if (!map[item]) {
-            result.push(item);
-            map[item] = true;
-         }
-      }
-   }
-   return result;
+   return Array.from(arguments).reduce((result, array) => {
+      return result.concat(array.filter(element => !result.includes(element)));
+   }, []);
 };
 
 /**