minor source code refactoring

Author: jkyberneees

lib/router/sequential.js

@@ -25,8 +25,8 @@ module.exports = (config = {}) => {
   }
 
   const routers = {}
-  const hasCache = config.cacheSize > 0
-  const cache = hasCache ? new LRU(config.cacheSize) : null
+  const isCacheEnabled = config.cacheSize > 0
+  const cache = isCacheEnabled ? new LRU(config.cacheSize) : null
   const router = new Trouter()
   router.id = config.id
 
@@ -59,7 +59,7 @@ module.exports = (config = {}) => {
     queryparams(req, req.url)
 
     let match
-    if (hasCache) {
+    if (isCacheEnabled) {
       const reqCacheKey = req.method + req.path
       match = cache.get(reqCacheKey)
       if (!match) {