Amen.
On Feb 21, 2012, at 12:01 PM, Stephen Bloch wrote: > > On Feb 21, 2012, at 11:45 AM, Matthias Felleisen wrote: > >> How can they do that [read and modify code written by bad OO programmers] if >> we teach them only bad OO programming? > > I wouldn't suggest that, of course. The last time I taught CS2 (or rather > CS1 in Java, having been expressly forbidden to use any other language), I > had students build lists and trees with polymorphism, then do it again with > nulls. > > I also had them build a list-of-lista data structure from scratch with a > functional API, and use this to solve the "permutations" problem; then I had > them do the same problem again using Java's built-in collection classes > (which have a very stateful API). The results were enlightening: almost > everybody got it working the functional way, but when we did it using Java > collection classes, ONE student in the class turned in a solution that > FREQUENTLY (not always) produced correct answers. > > > Stephen Bloch > [email protected] > ____________________ Racket Users list: http://lists.racket-lang.org/users
