Update README

README.md

@@ -49,4 +49,28 @@ router.route('/some/path/here', function (err, maybeResults) {
   //    Error: missing route or any other error that might happen
   // maybeResults: The return value from the hander from add
 })
+
+// add routes with regex
+router.add(['/by/regex', /(\d+)/g], function (one, two, three) {
+  // one === '1', two === '2', three === '3'
+})
+router.route('/by/regex/1-2-3')
+
+function toInt(part) {
+  var results = /^(\d+)$/.exec(part)
+  return results ? parseInt(results[0], 10) : null
+}
+
+// add routes with function
+var router = new Router()
+router.add(['by', 'func', toInt], function (val) {
+  // val === 123
+})
+
+router.route('/by/func/123')
+
+// Can check for not found route
+router.route('/unknown/route', function (err) {
+  // Router.isNotFound(err) === true
+})
 ```