Re: Question on HtDP

[Matthias Felleisen <matthias@ccs.neu.edu>]

Yes, HtDP is incorrect in a number of claims of this form. 
What is meant with these statements is 
 
 "The Scheme language level that you should be using 
  has only one primitive for dealing with symbols: symbol=?." 

They should all be rewritten, but I thought that this was too 
complicated. 

The require mechanism provides a good way for making drscheme
programs run in mzscheme. Indeed, you shouldn't know about this 
either. Just built launchers if you wish to produce "standalone"
programs from your drscheme functions. (Not totally easy but doable.) 

-- Matthias