What does .equals() do?
<p>I saw the use of an <code>.equals()</code> method in a Stackoverflow posting:</p>

<p><a href="https://stackoverflow.com/questions/3390930/any-way-to-make-jquery-inarray-case-insensitive">Any way to make jQuery.inArray() case insensitive?</a></p>

<pre><code>var matchString = "MATCHME";
var rslt = null;
$.each(['foo', 'bar', 'matchme'], function(index, value) { 
  if (rslt == null &amp;&amp; value.toLowerCase().equals(matchString.toLowerCase())) {
    rslt = index;
    return false;
  }
});
</code></pre>

<p>Yet I cannot find any documentation on this method. Any references would help.</p>