To compile js, run gulp. Solution uses AngularJs. To view recursive solution - open recursive.htrml. To view iterative solution - open iterative.htrml. For each solution, there is diferent module - app.js and app-iterative.js . which uses diferent list modules - egList or egListIterativeController. To run tests execute command kartma start (need karma-cli - npm install -g karma-cli).