Hi, Is there a way I can apply '+ to '( 1 2 3)?
edit: what i am trying to say is that the function i get will be a symbol. Is there a way to apply that?
Thanks.
I got an error " compile: unbound identifier (and no #%top syntax transformer is bound) in: +"
kunjaan
2009-06-25 18:04:47
what version of scheme? I tested that in Dr. Scheme before posting
Ben Hughes
2009-06-25 18:33:09
This is interesting. the statement by itself will not compile. It needs to be within a function or can be evaluated in the REPL.Are there restrictions to the binding regarding eval?
kunjaan
2009-06-25 18:59:10
A:
How about the scheme "apply"
(apply + `(1 2 3)) => 6
I hope that was what you were asking :)
micmoo
2009-06-25 17:11:01
+2
A:
In R5RS you need
(apply (eval '+ (scheme-report-environment 5)) '(1 2 3))
The "Pretty Big" language in Dr. Scheme allows for:
(apply (eval '+) '(1 2 3))
Davorak
2009-06-25 18:22:44
A:
;; This works the same as funcall in Common Lisp:
(define (funcall fun . args)
(apply fun args))
(funcall + 1 2 3 4) => 10
(funcall (lambda (a b) (+ a b) 2 3) => 5
(funcall newline) => *prints newline*
(apply newline) => *ERROR*
(apply newline '()) => *prints newline*
Btw, what's the deal with this "syntax highlighting" ??
Jyaan
2010-07-26 06:46:01