perf: use arrow function

lib/walkers/flat.js

@@ -24,34 +24,24 @@ module.exports = function (info, add, callback) {
             return callback(err);
         }
 
-        files.forEach(processFile);
+        files.forEach(basename => {
+            const splited = basename.split('.');
+
+            // has tech
+            if (splited.length > 1) {
+                const entity = parseEntityName(splited.shift());
+
+                if (entity) {
+                    add({
+                        path: path.join(levelpath, basename),
+                        entity: entity,
+                        tech: splited.join('.'),
+                        level: levelpath
+                    });
+                }
+            }
+        });
 
         callback();
     });
-
-    /**
-     * Processes file.
-     *
-     * If file name is valid BEM entity with tech extention
-     * then will be called `add` with info about this file.
-     *
-     * @param {string} basename - the file name (the last portion of a path).
-     */
-    function processFile (basename) {
-        const splited = basename.split('.');
-
-        // has tech
-        if (splited.length > 1) {
-            const entity = parseEntityName(splited.shift());
-
-            if (entity) {
-                add({
-                    path: path.join(levelpath, basename),
-                    entity: entity,
-                    tech: splited.join('.'),
-                    level: levelpath
-                });
-            }
-        }
-    }
 };