Re: Filtering chars from string

[Luiz Henrique de Figueiredo <lhf@...>]

> Is there a limit to how big those sets can be? In practice I'd be
> looking at a few dozen allowed chars.

No limit.
But as Francisco Olarte said, you may need to escape magic characters.
See http://www.lua.org/manual/5.3/manual.html#6.4.1