[RedNifre]

You can also remove the commas in the arrays.

[practal]

You could, there is no fixed syntax for arrays in Practal, so it would depend on which custom syntax becomes popular. But for expressions that are bracketed anyway, it makes sense to have commas (or other separators), because otherwise you write something like

    [(a b) (x y)]

instead of

    [a b, x y]

Personally, i like the second option better.