Добре дошли в DrRacket, версия 7.0 [3m].
Език: R5RS [потребителски]; memory limit: 128 MB.
> al
((a . 1) (b . 2) (c . 3))
> (keys al)
(a b c)
> (values al)
(1 2 3)
> (assoc 'a al)
(a . 1)
> (assq 'a al)
(a . 1)
> (assv 'a al)
(a . 1)
> (del-assoc 'a al)
((b . 2) (c . 3))
> (del-assoc 'c al)
((a . 1) (b . 2))
> (add-assoc 'a 10 al)
((a . 10) (b . 2) (c . 3))
> (add-assoc 'c 10 al)
((c . 10) (a . 1) (b . 2))
> (exists? odd? '(1 2 3 4 5))
#t
> (exists? negative? '(1 2 3 4 5))
#f
> (exists? negative? '(1 2 3 4 5))
#f
> (exists? (lambda (l) (memq 1 l)) '((2 4 6) (3 2 5) (7 8 9)))
#f
> (exists? (lambda (l) (memq 1 l)) '((2 4 6) (3 1 5) (7 8 9)))
(1 5)
#t
#f
> (search (lambda (l) (memq 1 l)) '((2 4 6) (3 1 5) (7 8 9)))

#t
#f
> (exists? (lambda (l) (memq 1 l)) '((2 4 6) (3 2 5) (7 8 9)))
#f
> (exists? (lambda (l) (memq 1 l)) '((2 4 6) (3 1 5) (7 8 9)))
#t
> (search (lambda (l) (memq 1 l)) '((2 4 6) (3 1 5) (7 8 9)))
(1 5)
> (assoc 'a al)
(a . 1)
> (assoc 'c al)
(c . 3)
#t
#f
> (all? odd? '(1 3 5))
#t
> (all? odd? '(1 3 2 5))
#f
> (all? odd? '(1 3 2 5))
#f
> (all? odd? '(1 3 5))
#t
> (not 'a)
#f