From 300ae386621fa53c44989f3fa6937adc159d5071 Mon Sep 17 00:00:00 2001
From: Eduardo-M-Cavalcanti <eduardo.m.cavalcanti@uol.com.br>
Date: Tue, 17 Nov 2015 11:41:25 -0200
Subject: [PATCH 1/2] =Avoids duplicated registration of event handler

---
 ng-websocket.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ng-websocket.js b/ng-websocket.js
index ca65608..c5d85a8 100644
--- a/ng-websocket.js
+++ b/ng-websocket.js
@@ -200,7 +200,8 @@
 
             me.$$eventMap[event] = me.$$eventMap[event] || [];
             for (var i = 0; i < handlers.length; i++) {
-                me.$$eventMap[event].push(handlers[i]);
+                if (me.$$eventMap[event].indexOf(handlers[i]) < 0)
+                    me.$$eventMap[event].push(handlers[i]);
             }
 
             return me;

From e0f43587f53fa68244a4d1f651b89cbe4a22b475 Mon Sep 17 00:00:00 2001
From: Eduardo-M-Cavalcanti <eduardo.m.cavalcanti@uol.com.br>
Date: Tue, 17 Nov 2015 12:04:11 -0200
Subject: [PATCH 2/2] Optional deregistration of event handlers. Allows
 deregistration of multiple handlers with the same call.

---
 ng-websocket.js | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/ng-websocket.js b/ng-websocket.js
index c5d85a8..41fe976 100644
--- a/ng-websocket.js
+++ b/ng-websocket.js
@@ -207,12 +207,29 @@
             return me;
         };
 
-        me.$un = function (event) {
+        me.$un = function () {
+
+            var handlers = [], index, eventMap;
+
+            Array.prototype.push.apply(handlers, arguments);
+
+            var event = handlers.shift();
+
             if (typeof event !== 'string') throw new Error('$un needs a String representing an event.');
 
-            if (typeof me.$$eventMap[event] !== 'undefined') delete me.$$eventMap[event];
+            if (handlers.length == 0) {
+                if (typeof me.$$eventMap[event] !== 'undefined')
+                    delete me.$$eventMap[event];
+                }
+            else {
+                for (var i = 0; i < handlers.length; i++) {
+                  index = me.$$eventMap[event].indexOf(handlers[i]);
 
-            return me;
+                  if (index >= 0 ) {
+                    me.$$eventMap[event].splice(index, 1);
+                    }
+                  }
+                }
         };
 
         me.$$send = function (message) {