Check if at least one key in array starts with character
<p>I have an array with terms and definitions></p>

<pre><code>$myArray = array("apple" =&gt; "Fruit that grows ...", "car" =&gt; "Vehicle on four...");  
</code></pre>

<p>How do I determine if I have words starting with a particular letter? Say, "c" for car? </p>

<p>I need to do this check with JS if possible, without reloading the page.</p>
