 get values contained in a data structure
but will throw errors on bad keys to arrays, tuple, and string-likes. You should prefer `in` going forward as
it can be used to better detect errors. For tables and structs, `in` behaves identically to `get`.
</p>
<pre class="mendoza-codeblock"><code data-language="janet">(<span class="mdzsyn-coresym">in</span> @[<span class="mdzsyn-keyword">:a</span> <span class="mdzsyn-keyword">:b</span> <span class="mdzsyn-keyword">:c</span>] <span class="mdzsyn-number">2</span>)