Newlisp - Reasoned Schemer - kanren-book

[Tim Johnson]

I just got the "Reasoned Schemer".



The code that supports the lessons in the book are at:

http://sourceforge.net/project/showfiles.php?group_id=99654">http://sourceforge.net/project/showfile ... p_id=99654">http://sourceforge.net/project/showfiles.php?group_id=99654



I'd welcome comments on how difficult it might be to port

the kanren code to newlisp.



On a scale of 1 to 10? :-)

thanks

Tim

[cormullion]

I suspect that it wouldn't be too hard, if you understood Scheme. I can guess  at one:

Code Select Expand

(define nl (string #newline))

could be

Code Select Expand

(define (nl) (string "n"))

Luckily there are some schemers on this forum.

[Tim Johnson]

Sounds promising. I've barely fooled around with scheme, but

I do have a couple of books here on the language specs.

thnx

tim

[Lutz]

The newLISP equivalent would be:

Code Select Expand

(define nl "n")

This is not defining a procedure but only a variable. Also newLISP does not have a character data type, but uses strings of length one for characters. Therefore we do not need to use 'string' to transform #newline.



So in the end above statement is valid in newLISP and Scheme.