/
multiremberandcoexpansion.scm
82 lines (70 loc) · 2.32 KB
/
multiremberandcoexpansion.scm
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(define multirember&co
(lambda (a lat col)
(cond
((null? lat)
(col '() '()))
((eq? (car lat) a)
(multirember&co a (cdr lat)
(lambda (newlat seen)
(col newlat (cons (car lat) seen)))))
(else
(multirember&co a (cdr lat)
(lambda (newlat seen)
(col (cons (car lat) newlat) seen)))))))
(define last-friend
(lambda (x y)
(length x)))
(multirember&co 'tuna '(strawberries tuna and swordfish) last-friend)
(multirember&co 'tuna '(tuna and swordfish)
(lambda (newlat seen)
(last-friend (cons 'strawberries newlat) seen))
)
(multirember&co 'tuna '(and swordfish)
(lambda (newlat seen)
(lambda (newlat seen)
(last-friend (cons 'strawberries newlat) seen)
) newlat (cons 'tuna seen))
)
(multirember&co 'tuna '(swordfish)
(lambda (newlat seen)
(lambda (newlat seen)
(lambda (newlat seen)
(last-friend (cons 'strawberries newlat) seen)
) newlat (cons 'tuna seen)
) (cons 'and newlat) seen)
)
(multirember&co 'tuna '()
(lambda (newlat seen)
(lambda (newlat seen)
(lambda (newlat seen)
(lambda (newlat seen)
(last-friend (cons 'strawberries newlat) seen)
) newlat (cons 'tuna seen)
) (cons 'and newlat) seen
) (cons 'swordfish newlat) seen)
)
((lambda (newlat seen)
(lambda (newlat seen)
(lambda (newlat seen)
(lambda (newlat seen)
(last-friend (cons 'strawberries newlat) seen)
) newlat (cons 'tuna seen)
) (cons 'and newlat) seen
) (cons 'swordfish newlat) seen) '() '())
((lambda (newlat seen)
(lambda (newlat seen)
(lambda (newlat seen)
(last-friend (cons 'strawberries newlat) seen)
) newlat (cons 'tuna seen)
) (cons 'and newlat) seen
) '(swordfish) '())
((lambda (newlat seen)
(lambda (newlat seen)
(last-friend (cons 'strawberries newlat) seen)
) newlat (cons 'tuna seen)
) '(and swordfish) '())
((lambda (newlat seen)
(last-friend (cons 'strawberries newlat) seen)
) '(and swordfish) '(tuna))
(last-friend '(strawberries and swordfish) '(tuna))
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