comparison
for your own types.
</p>
<p>The polymorphic comparison operators all use a function called <code class="mendoza-code">compare</code>
to establish an ordering between janet values.  The <code class="mendoza-code">compare</code> function
compares two values (here called <code class="mendoza-code">a</code> and <code class="mendoza-code">b</code>), and returns -1, 0, or
1 for <code class="mendoza-code">a &lt; b</code>, <code class="mendoza-code">a = b</code>, <code class="mendoza-code">a &gt; b</code