Comments (1)
gus-massa
commented on July 19, 2024
The result of display-frame is a bitmap% object. The results of each top expression have an implicit println, so the first example,
(println (set-frame dc (make-color 255 255 255))) ; --> (println (void)) doen't show anything
(println (display-frame dc)) ; --> shows a square
The expressions inside for or any other construction don't have the implicit println. So in the second example
(for ([x (in-range 4)])
(set-frame dc (make-color 255 0 0)) ; --> not shown
(display-frame dc); --> not shown
) ; --> the result of for is (void), so --> (println (void)) doen't show anything
from draw.
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from draw.