rex usage examples
(user input is shown in bold)
rex > length([ [1, 2], [3, 4], [5, 6] ]);
3

rex > sort([3, 9, 1, 2, 8, 7, 5, 6, 4]);
[1, 2, 3, 4, 5, 6, 7, 8, 9]

rex > sort(["oats", "peas", "beans", "barley"]);
[barley, beans, oats, peas]

rex >