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The r-cade package is a very simple game engine for the Racket programming language
https://github.com/massung/r-cade
Size: a a a
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(define (proper->dotted lst)
(cond
[(eq? '() (cddr lst))
(cons (car lst) (cadr lst))]
[else
(cons (car lst) (proper->dotted (cdr lst)))]))
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