section>
        <section id="objects-and-arrays">
          <%= htmlFor('objects_and_arrays') %>
        </section>
        <section id="comments">
          <%= htmlFor('comments') %>
        </section>
        <section id="lexical-scope">
          <%= htmlFor('lexical_scope') %>
        </section>
        <section id="conditionals">
          <%= htmlFor('conditionals') %>
        </section>
        <section id="splats">
          <%= htmlFor('splats') %>
        </section>
        <section id="loops">
