Top "Htdp" questions

Use this tag both for questions concerning exercises from the book and for questions regarding the teaching HtDP teaching languages in DrRacket.

Use of local in Racket/Scheme

In Exercise 18.1.12 from htdp, I've re-written the maxi function using "local". ;; maxi : non-empty-lon -> number ;; to determine the largest …

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scheme racket htdp
How to make a GUI using Lisp: DrScheme or Common Lisp

Or the basic work need to do to create a GUI. I know the basic Components of GUI, but where …

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user-interface lisp racket htdp
How to do a powerset in DrRacket?

I'm using the beginning language with list abbreviations for DrRacket and want to make a powerset recursively but cannot figure …

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scheme racket powerset htdp