How to sort an array of dictionaries : <p>I have an array of dictionaries that looks like the following:</p>

<pre><code>locationArray [{
    annotation = "&lt;MKPointAnnotation: 0x7fb75a782380&gt;";
    country = Canada;
    latitude = "71.47385399229037";
    longitude = "-96.81064609999999";
}, {
    annotation = "&lt;MKPointAnnotation: 0x7fb75f01f6c0&gt;";
    country = Mexico;
    latitude = "23.94480686844645";
    longitude = "-102.55803745";
}, {
    annotation = "&lt;MKPointAnnotation: 0x7fb75f0e6360&gt;";
    country = "United States of America";
    latitude = "37.99472997055178";
    longitude = "-95.85629150000001";
}]
</code></pre>

<p>I would like sort on longitude.</p>
