30 lines
755 B
Plaintext
30 lines
755 B
Plaintext
#lang slideshow
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(define (my-map f lst)
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(cond
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[(empty? lst) empty]
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[else (cons (f (first lst))
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(my-map f (rest lst)))]))
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(define (rainbow p)
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(map (lambda (color)
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(colorize p color))
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(list "red" "orange" "yellow" "green" "blue" "purple")))
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(rainbow (circle 10))
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;(define (rainbow2 color-list)
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; (define (color-mapper gr-obj color-list)
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; (cond
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; [(empty? color-list) empty]
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; [else (cons(colorize gr-obj (first color-list)))
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; (color-mapper gr-obj (rest color-list))
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; (color-mapper gr-obj (list "red" "orange" "yellow" "green" "blue" "purple"))]
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; )
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; )
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;)
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;[else (cons (colorize gr-obj (first color-list))
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; (color-mapper gr-obj (rest color-list)))])) |