diff --git a/.gitignore b/.gitignore
index 3c3629e..ec7a3a3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,5 @@
 node_modules
+.idea
+*.swp
+*.log
+
diff --git a/lib/memcached.js b/lib/memcached.js
index d699f2b..be2882f 100644
--- a/lib/memcached.js
+++ b/lib/memcached.js
@@ -31,8 +31,7 @@ var curry = Utils.curry;
 function Client (args, options) {
   var servers = []
     , weights = {}
-    , regular = 'localhost:11211'
-    , key;
+    , regular = 'localhost:11211';
 
   // Parse down the connection arguments
   switch (Object.prototype.toString.call(args)) {
@@ -112,8 +111,7 @@ Client.config = {
   nMemcached.prototype.__proto__ = require('events').EventEmitter.prototype;
 
   var memcached = nMemcached.prototype
-    , privates = {}
-    , undefined;
+    , privates = {};
 
   // Creates or generates a new connection for the give server, the callback
   // will receive the connection if the operation was successful
@@ -319,7 +317,7 @@ Client.config = {
         var S = {
           serverAddress: server,
           tokens: server.split(':').reverse()
-        }
+        };
         var message = error || 'Unable to connect to server';
         memcached.connectionIssue(message, S);
         return query.callback && memcached.makeCallback(query.callback,new Error(message));
@@ -706,8 +704,7 @@ Client.config = {
       , dataSet
       , resultSet
       , metaData
-      , err = []
-      , tmp;
+      , err = [];
 
     while(S.bufferArray.length && privates.allCommands.test(S.bufferArray[0])) {
       token = S.bufferArray.shift();
diff --git a/lib/utils.js b/lib/utils.js
index a450d9c..0757ffd 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -31,9 +31,13 @@ exports.validateArg = function validateArg (args, config) {
         }
         if (!err && key === 'key') {
           for (var vKey in value) {
+            if (!value.hasOwnProperty(vKey)) continue;
             var vValue = value[vKey];
             var result = validateKeySize(config, vKey, vValue);
             if (result.err) {
+              if (result.err === 'function') {
+                continue;
+              }
               err = result.err;
             } else {
               args.command = args.command.replace(vValue, result['value']);
@@ -87,6 +91,10 @@ exports.validateArg = function validateArg (args, config) {
 };
 
 var validateKeySize = function validateKeySize(config, key, value) {
+  if (typeof value === 'function') {
+    return { err: 'function' };
+  }
+
   if (value.length > config.maxKeySize) {
     if (config.keyCompression){
       return { err: false, value: createHash('md5').update(value).digest('hex') };
@@ -111,6 +119,7 @@ exports.fuse = function fuse (target, handlers) {
 // merges a object's proppertys / values with a other object
 exports.merge = function merge (target, obj) {
   for (var i in obj) {
+    if (!obj.hasOwnProperty(i)) continue;
     target[i] = obj[i];
   }