made filter to work by regex (untested)

.jshintrc

@@ -1,5 +1,4 @@
-{ "es5": true
-, "node": true
+{ "node": true
 , "browser": true
 , "jquery": true
 

lib/walk.js

@@ -37,7 +37,7 @@
     me._wq = [];
     me._wqueue = [me._wq];
     me._wcurpath = undefined;
-    me._wfilters = options.filters;
+    me._wfilters = options.filters || [];
     me._wfirstrun = true;
     me._wcurpath = pathname;
 
@@ -185,30 +185,32 @@
       me._wReadFiles();
     });
   };
-  Walker.prototype._wWalkSync = function () {
-    console.log('walkSync');
-    var err
-      , files
-      , me = this
+  Walker.prototype._wFilter = function () {
+    var me = this
+      , exclude
       ;
 
     // Stop directories that contain filter keywords
     // from continuing through the walk process
-    if (me._wfilters != undefined) {
-      var shouldExclude = false;
-      for (var iFilter=0; iFilter<me._wfilters.length; ++iFilter) {
-        if (me._wcurpath.indexOf(me._wfilters[iFilter]) != -1 ) {
-          me._wNext();
-        }
+    exclude = me._wfilters.some(function (filter) {
+      if (me._wcurpath.match(filter)) {
+        return true;
       }
-    }
+    });
 
-    if( !shouldExclude ) {
-      try {
-        files = fs.readdirSync(me._wcurpath);
-      } catch(e) {
-        err = e;
-      }
+    return exclude;
+  };
+  Walker.prototype._wWalkSync = function () {
+    //console.log('walkSync');
+    var err
+      , files
+      , me = this
+      ;
+
+    try {
+      files = fs.readdirSync(me._wcurpath);
+    } catch(e) {
+      err = e;
     }
 
     me._wReaddirHandler(err, files);
@@ -218,16 +220,6 @@
     var me = this
       ;
 
-    // Stop directories that contain filter keywords
-    // from continuing through the walk process
-    if (me._wfilters != undefined) {
-      for (var iFilter=0; iFilter<me._wfilters.length; ++iFilter) {
-        if (me._wcurpath.indexOf(me._wfilters[iFilter]) != -1 ) {
-          me._wNext();
-        }
-      }
-    }
-
     // TODO how to remove this anony?
     fs.readdir(me._wcurpath, function (err, files) {
       me._wReaddirHandler(err, files);
@@ -242,13 +234,20 @@
     }
     if (me._wq.length) {
       me._wcurpath = me._wq.pop();
-      me._wWalk();
+      while (me._wq.length && me._wFilter()) {
+        me._wcurpath = me._wq.pop();
+      }
+      if (me._wcurpath) {
+        me._wWalk();
+      } else {
+        me._wNext();
+      }
       return;
     }
     me._wqueue.length -= 1;
     if (me._wqueue.length) {
       me._wq = me._wqueue[me._wqueue.length - 1];
-      return this._wNext();
+      return me._wNext();
     }
 
     // To not break compatibility