The item exists in the array but it says that the array is 0 length?
<p>I can add an item to an array it and I can access that item, but the <code>length</code> reports <code>0</code>. Why?</p>

<pre><code>var arr = [];
arr[4294967300] = "My item";
console.log(arr[4294967300], arr.length); // Outputs "My item", 0
</code></pre>
