[plt-scheme] Teaching languages and 2htdp/image

From: Justin Zamora (justin at zamora.com)
Date: Fri Jun 4 10:52:58 EDT 2010

I would like to use 2htdp/universe and 2htdp/image with the HTDP
teaching languages, but I get conflicts because image? is defined
differently in 2htdp/image and the teaching languages.  For example:

#lang racket

(require lang/htdp-beginner)
(require 2htdp/universe)
(require 2htdp/image)

results in the error:

simple-world.rkt:5:9: module: identifier already imported from a
different source in:

I can avoid this by using (require (rename-in lang/htdp-beginner
(image? htdp/image))), but that seems inappropriate "magic" to use
with beginning students.  Is there a better way to achieve this?


Posted on the users mailing list.