I just have to say that that's really cool. Corey <div>On 12/19/05, Robby Findler <<a href="mailto:robby@cs.uchicago.edu">robby@cs.uchicago.edu</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Images are special cased in the teaching language's implementation of equal? to look at the pixels and do a structural comparison. In the professional languages, they are just treated as any other object, and the comparison is identity-based (ie, if I mutate one of them, does the other change). hth, Robby At Sun, 18 Dec 2005 16:09:41 -0800, Joshua Zucker wrote: > Hi folks, > I would love some help understanding the different behavior of equal? > with images in beginning student vs pretty big (and maybe some clue > about at what language levels the difference happens, and what to do > if I want to reproduce the beginning student behavior at the pretty > big level). > > Thanks! > --Joshua Zucker > _________________________________________________ >   For list-related administrative tasks: >   <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme">http://list.cs.brown.edu/mailman/listinfo/plt-scheme </a> _________________________________________________   For list-related administrative tasks:   <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme">http://list.cs.brown.edu/mailman/listinfo/plt-scheme </a> </blockquote></div> -- ((lambda (y) (y y)) (lambda (y) (y y)))