\begin{center}\begin{minipage}{15cm}\begin{Verbatim}[frame=single]
> L = [| "foo" |];
> L = L:.1;
> L = "bar".:L;
> L;
[|"bar", "foo", 1|]
> L[1];
foo
> L@L;
[|"bar", "foo", 1, "bar", "foo", 1|]
\end{Verbatim}
\end{minipage}\end{center}
