orresponding function above.  <code>&quot;===&quot;</code> and <code>&quot;!==&quot;</code> do simple
string comparison, but are included for completeness.  Throws if an
invalid comparison string is provided.</li>
<li><code>compare(v1, v2)</code>: Return <code>0</code> if <code>v1 == v2</code>, or <code>1</code> if <code>v1</code> is greater, or <code>-1</code> if
<code>v2</code> is greater.  Sorts in ascending order if passed to <code>Array.sort()</code>.</li>
<li><code>rcompare(v1, v2)</code>: The reverse