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Topics - incogn1to

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#1
newLISP Graphics & Sound / graphic file
July 13, 2011, 08:56:08 PM
Is there a way to open graphic file in newLisp? For example jpeg or gif file? I understand that there is a way to import C libs, but libjpeg, for example, includes work with pointers and I don't know how to make it possible in newLisp.
#2
newLISP in the real world / destructive functions & trees
April 30, 2011, 05:40:01 PM
I have a few questions about destructive functions. Can anybody explain why setf doesn't work with passed values ? It may return correct value, but it doesn't change the variable itself.



PS maybe it would be better if I describe full problem:

I need to edit branches or / and leafs inside a tree. I wanted to pas the branch as a parameter to my changing function, and process it with destructive pop and push functions, but it doesn't work. Is there a right way to do this?
#3
newLISP in the real world / [solved] OOP
March 05, 2011, 01:55:14 PM
I found an interesting piece of code in scheme, but I failed to make it work in newLisp. Can anybody explain why?


Code Select
(define (make-square side)
   (lambda (msg)
    (cond ((eq? msg 'area) (* side side))
      ((eq? msg 'perimeter) (* 4 side))
      (else (error "unknown message")))))

> (define s1 (make-square 4))
> (s1 'area)
> 16
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