[racket-users] Re: Problem with macro which implements selectors for mutable pairs

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[racket-users] Re: Problem with macro which implements selectors for mutable pairs

Sorry, In my code, there is (car l) but of course it should be (car selectors). (let ((loop (gensym))) `(let ,loop ((selectors (,seek2 (quote ,@body)) )) ;;list of selectors (cond ((null? selectors) (,@body)) (else (define (car selectors)

[racket-users] Problem with macro which implements selectors for mutable pairs

Hi, I'm trying to program a macro which defines different selectors for mutable pairs. I know in Racket it's possible to use only mcar and mcdr, but mcdar etc. could be useful for me. I would like to use macro this way: (with-mcxrs (let ((a (mcons (mcons 1 2) (mcons (mcons 3 4) '()

[racket-users] Re: Problem with # and mutable lists

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[racket-users] Re: Problem with # and mutable lists

Thank you very much, but although I changed else expresion, Racket sometimes returns same warning(but now with #f instead of #). But when I click Run again (sometimes twice or more) it returns what I want. That´s the strangest thing. Could it be an error in Racket settings? I attach my code,

[racket-users] Re: Problem with # and mutable lists

Thank for your answer, but how should I change the procedure and ged rid of Racket warning? I cant figure it out. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email

[racket-users] Re: Problem with # and mutable lists

Dne neděle 10. dubna 2016 13:29:43 UTC+2 Joan Martin napsal(a): > Hello, > I try to write a programme (a game), where I use lots of mutable lists (named > environment).Something like this: > (define environment > (mcons (mcons (mcons 1 (mcons (mcons 2(

[racket-users] Problem with # and mutable lists

Hello, I try to write a programme (a game), where I use lots of mutable lists (named environment).Something like this: (define environment (mcons (mcons (mcons 1 (mcons (mcons 2(mcons 5(mcons 8 '('() )) (mcons (mcons 2 (mcons (mcons 1(mcons 3(mcons 10 '( '() ))