Self documenting api in node.js

gistfile1.js

app.get('/api/', function(req, res) {
    // This endpoint
    //returns the routes available in the api
  var routes = [];
  for(var verb in app.routes){
    app.routes[verb].forEach(function(route) {
        var doc = route.callbacks[route.callbacks.length-1].toString().split('\n').filter(function(str) {
         var doc = str.match(/(?:\s\/\/)(.*)/);
         if(doc == null) return false;
         return true;
     }).map(function(doc) {
        return doc.match(/(?:\s\/\/)(.*)/)[1];
     }).join('\n');
        routes.push({method: verb, path: route.path, keys: route.keys, doc: doc});
    });
  }
  res.json(routes);
});

All comments are returned in the doc as documentation for the endpoint.