[luckydude]

You are kind of making my point. In tcl, they'd just give you "", but you can't tell the difference between "past the end of the array" or an element where you said

set foo[i] = ""

In Little you can tell, we'll return undef (your clear "error" though in these languages it is a supported feature, not an error). So we support the auto expanding array but give you that extra bit of info that you are past the end.