title: Getting error CreateListFromArrayLike called on non-object when trying to use .apply()
body: <p>I've created a simple little route parsing function so that I can keep my code clean and easily maintainable, this is the little function that gets ran when the app starts up and parses the <code>config.json</code> file and binds the appropriate methods and request paths:</p>
  
  <pre><code>const fs = require('fs');
  const path = require('path');
  module.exports = function(app, root) {
    fs.readdirSync(root).forEach((file) =&gt; {
      let dir = path.resolve(root, file);
      let stats = fs.lstatSync(dir);
      if (stats.isDirectory()) {
        let conf = require(dir + '/config.json');
        conf.name = file;
        conf.directory = dir;
        if (conf.routes) route(app, conf);
      }
    })
  }
  
  function route(app, conf) {
    let mod = require(conf.directory);
  
    for (let key in conf.routes) {
      let prop = conf.routes[key];
      let method = key.split(' ')[0];
      let path = key.split(' ')[1];
  
      let fn = mod[prop];
      if (!fn) throw new Error(conf.name + ': exports.' + prop + ' is not defined');
      if (Array.isArray(fn)) {
        app[method.toLowerCase()].apply(this, path, fn);
      } else {
        app[method.toLowerCase()](path, fn);
      }
    }
  }
  </code></pre>
  
  <p>The problem I have is some times I need to pass in multiple arguments to an express router, e.g. in the case of using passport something like this:</p>
  
  <pre><code>exports.authSteam = [
    passport.authenticate('facebook', { failureRedirect: '/' }),
    function(req, res) {
      res.redirect("/");
    }
  ];
  </code></pre>
  
  <p>So I figure I can just pass them as an array, and then parse them into the router appropriately, my config for example looks like this:</p>
  
  <pre><code>{
    "name": "Routes for the authentication",
    "description": "Handles the authentication",
    "routes": {
      "GET /auth/facebook": "authFacebook",
      "GET /auth/facebook/return": "authFacebookReturn"
    }
  }
  </code></pre>
  
  <p>The only problem is I'm getting this error:</p>
  
  <pre><code>     app[method.toLowerCase()].apply(this, path, fn);
                                  ^
  
  TypeError: CreateListFromArrayLike called on non-object
  </code></pre>
  
  <p>if I <code>console.log(fn)</code> I see <code>[ [Function: authenticate], [Function] ]</code></p>
  
  <p>I'm not exactly sure what I am doing wrong, any information would be great thanks.</p>