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