code sample pattern

code.js

// this outlines the recommended approach for handling code samples in the book
// block 1 introdcues a stubbed module
// block 2 contains implementation details for subbed module method
// this prevents duplication while still providing context
// comments before code block would be the code block tile in the book

// [[app_stub_2_4]]
// Application Stub
export default class Application {
  
  constructor(routes, options) {
    
  }
  
  navigate(url, push=true) {
    
  }
  
  start() {
    
  }
  
}

// [[app_constructor_2_4]]
// <<app_stub_2_4>> constructor method
constructor() {
  // save off routes as look up table for controllers
  this.routes = routes;
  this.options = options;
  // create a call router instance
  this.router = new Call.Router();
  this.registerRoutes(routes);  
}