CISC108 exam 2

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(define T1 (make-tool 'ax 3)) (define T2 (make-tool 'abacus 27)) (define P1 (make-player 100 (list T1 T2) #true)) ;; WRONG!!!!!!!: (define P1 (make-player 100 '(T1 T2) #true)) (define P2 (make-player 23 (list T2) #false)) Rewrite using local Trees(3) (define (listing-fun l) ( ... (show-fun (listing-show l)) ... (nat-fun (listing-season l)) Rewrite Local
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; Functional abstraction: ; two functions with a lot in common: abstract to a general function ; add more arguments: including arguments that are functions. ; Functions are another type of data: (X -> Y) ; Signatures can be parameterized! ; [List-of X] denotes the type "list of X" (require 2htdp/image) (define (big? img) (> (* (image-height img) (image-width img)) 100)) ;; [List-of Image] -> [List-of Image]
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