I think I'm beginning to see the picture and I have to work on it more. Data definitions and design recipes. I finished all the exercises from earlier 10 sections without them, but now I see how helpful they are. While being blocked on 11.5.3 I started working on the next one, about deep-lists, and used the design recipe approach seriously. It made the dl concept so easy! Thank you all!
On 29 May 2011 03:30, Stephen Bloch <[email protected]> wrote: > > On May 28, 2011, at 3:30 PM, Matthias Felleisen wrote: > >> >> Follow the design recipe. >> >> A natural number is one of: >> -- 0 >> -- one more than n for some natural number n > > I don't think that's the issue: he's already successfully written a couple of > functions using this template. > > Problem 11.5.3 says "develop the function exponent ... Eliminate * from this > definition too." The natural-number template is fine for putting together > the right number of x's, but how do you multiply the (not necessarily > natural) x's together without * ? > > > Stephen Bloch > [email protected] _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
