From 792dc0246a7f4a144d7715eadc1c8a6fe8fc9d5a Mon Sep 17 00:00:00 2001
From: Malash <i@malash.me>
Date: Sat, 10 Oct 2015 14:50:15 +0800
Subject: [PATCH] Rewrite util.extend to a clone version

---
 dist/ua-parser.min.js  |  2 +-
 dist/ua-parser.pack.js |  2 +-
 src/ua-parser.js       | 18 ++++++++++--------
 3 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/dist/ua-parser.min.js b/dist/ua-parser.min.js
index f9607b8..1e2c6dd 100644
--- a/dist/ua-parser.min.js
+++ b/dist/ua-parser.min.js
@@ -5,4 +5,4 @@
  *
  * Copyright © 2012-2015 Faisal Salman <fyzlman@gmail.com>
  * Dual licensed under GPLv2 & MIT
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diff --git a/dist/ua-parser.pack.js b/dist/ua-parser.pack.js
index f9607b8..1e2c6dd 100644
--- a/dist/ua-parser.pack.js
+++ b/dist/ua-parser.pack.js
@@ -5,4 +5,4 @@
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  * Dual licensed under GPLv2 & MIT
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diff --git a/src/ua-parser.js b/src/ua-parser.js
index 16dadc2..a88a6a0 100644
--- a/src/ua-parser.js
+++ b/src/ua-parser.js
@@ -45,12 +45,15 @@
 
     var util = {
         extend : function (regexes, extensions) {
-            for (var i in extensions) {
-                if ("browser cpu device engine os".indexOf(i) !== -1 && extensions[i].length % 2 === 0) {
-                    regexes[i] = extensions[i].concat(regexes[i]);
+            var margedRegexes = {};
+            for (var i in regexes) {
+                if (extensions[i] && extensions[i].length % 2 === 0) {
+                    margedRegexes[i] = extensions[i].concat(regexes[i]);
+                } else {
+                    margedRegexes[i] = regexes[i];
                 }
             }
-            return regexes;
+            return margedRegexes;
         },
         has : function (str1, str2) {
           if (typeof str1 === "string") {
@@ -531,7 +534,7 @@
             /(alcatel|geeksphone|huawei|lenovo|nexian|panasonic|(?=;\s)sony)[_\s-]?([\w-]+)*/i
                                                                                 // Alcatel/GeeksPhone/Huawei/Lenovo/Nexian/Panasonic/Sony
             ], [VENDOR, [MODEL, /_/g, ' '], [TYPE, MOBILE]], [
-                
+
             /(nexus\s9)/i                                                       // HTC Nexus 9
             ], [MODEL, [VENDOR, 'HTC'], [TYPE, TABLET]], [
 
@@ -651,7 +654,7 @@
             ], [VENDOR, MODEL, [TYPE, MOBILE]], [
             /(i-STYLE2.1)/i                                                     // i-mobile i-STYLE 2.1
             ], [[MODEL, 'i-STYLE 2.1'], [VENDOR, 'i-mobile'], [TYPE, MOBILE]], [
-            
+
             /(mobiistar touch LAI 512)/i                                        // mobiistar touch LAI 512
             ], [[MODEL, 'Touch LAI 512'], [VENDOR, 'mobiistar'], [TYPE, MOBILE]], [
 
@@ -794,7 +797,6 @@
             ua = uastring;
             return this;
         };
-        this.setUA(ua);
         return this;
     };
 
@@ -853,7 +855,7 @@
     }
 
     // jQuery/Zepto specific (optional)
-    // Note: 
+    // Note:
     //   In AMD env the global scope should be kept clean, but jQuery is an exception.
     //   jQuery always exports to global scope, unless jQuery.noConflict(true) is used,
     //   and we should catch that.