e><span class="label label-meta label-meta-value" title="@:value metadata">@:value(HashKey.next())</span><span class="label">read only</span><a href="../../polygonal/ds/Array2.html#key"><span class="identifier">key</span></a>:<span class="type">Int</span><span> = HashKey.next()</span></code></h3><div class="doc"><p>A unique identifier for this object.</p>
<p>A hash table transforms this key into an index of an array element by using a hash function.</p></div></div><div class="field "><a name="reuseIterator"