Re: (pack (intern NIL)) bug?

On Wed, Apr 22, 2009 at 10:07:54AM +0100, Tomas Hlavaty wrote: Are there other special symbols in the 32bit PicoLisp that behave like NIL? Not that I can think of any. Except for the mentioned example where symbols look like numbers. Cheers, - Alex -- UNSUBSCRIBE:

Re: (pack (intern NIL)) bug?

Hi Alex, The question is: What is the correct way? I am writing my own sexp reader which is safe against malicious input, i.e. it does not call eval (the escape chars like ` are not understood). : (intern 123) - 123 : (+ @ 7) 123 -- Number expected I thought I could use

'chain' and atom argument

Hi Alex, (chain 'lst ..) - lst is there a reason 'chain' does not work with atoms? : (make (link 1)) - (1) : (make (link 1) (chain 2)) - (1) : (make (link 1) (chain (cons 2 3))) - (1 2 . 3) : (make (link 1) (chain 2) (chain (cons 3 4))) - (1 3 . 4) : (make (link 1) (chain 2) (chain (cons 3

Re: 'chain' and atom argument

Hi Alex, I would expect: : (make (link 1) (chain 2)) - (1 . 2) In this respect, 'chain' is analogous, it simply processes the cell arguments, and does not preserve any CDRs, as it cannot not know if later more elements will be added with 'link' or 'chain'. Yes, I think the behaviour

Re: collect and db difference?

Hi Alex, 1. You could use the Pilog functions 'pilog' or 'solve' and 'select' 2. The most efficient way is to use an '+Aux' key. This generates a combined key in addition to the two indexes for 'usr' and 'doc'. Thank you for the examples, Tomas -- UNSUBSCRIBE: