Note that you'll need to change (def base-url "http://news.ycombinator.com/ http://news.ycombinator.com/) to (def base-url "https://news.ycombinator.com/ https:

Note that you'll need to change (def base-url "http://news.ycombinator.com/ http://news.ycombinator.com/) to (def base-url "https://news.ycombinator.com/ https://news.ycombinator.com/) in the first example in order for it to work properly.