his means that can associate keys with values for
arrays, tables, and buffers. If an index is given that is past the
end of the array, the array is first padded with nils so that it is large
enough to accommodate the new element.
</p>
<pre class="mendoza-codeblock"><code data-language="janet">(<span class="mdzsyn-coresym">def</span> <span class="mdzsyn-symbol">arr</span> @[])
(<span class="mdzsyn-coresym">put</span> <span class="mdzsyn-symbol">arr</span> <span class="mdzsyn-number">0</span> <span class="mdz