Refactor codebase a bit

Author: arunoda

lib/server/balancer/utils.js

@@ -103,9 +103,12 @@ function _sendSockJsInfo(req, res, cookies) {
   }
 
   var endpointHash = Cluster.discovery.endpointToHash(endpoint);
-  // when no balancer url is provided, using endpoint's absolute path instead of relative path
+  // when no balancer url is provided, 
+  // using endpoint's absolute path instead of relative path
   var balancer = Cluster.discovery.pickBalancer(endpointHash) || endpoint || "";
-  if (!/(\w+)\/$/.test(balancer)) balancer += '/'; // add tail backslash if path not end with it
+  // add tail backslash if path not end with it
+  balancer = (/\/$/).test(balancer)? balancer : balancer + '/';
+
   var base_url =
     urlResolve(balancer, "cluster-ddp/" + endpointHash + "/" + serviceName);