misc refactor of parseCookie()

lib/utils.js

@@ -136,13 +136,11 @@ exports.parseCookie = function(str){
       , key = pair.substr(0, eqlIndex).trim().toLowerCase()
       , val = pair.substr(++eqlIndex, pair.length).trim();
 
-    // Quoted values
-    if (val[0] === '"') {
-      val = val.slice(1, -1);
-    }
+    // quoted values
+    if ('"' == val[0]) val = val.slice(1, -1);
 
-    // Only assign once
-    if (obj[key] === undefined) {
+    // only assign once
+    if (undefined == obj[key]) {
       val = val.replace(/\+/g, ' ');
       try {
         obj[key] = decodeURIComponent(val);