[plt-scheme] htdp section 17.7

From: wooks . (wookiz at hotmail.com)
Date: Wed Jul 5 19:11:32 EDT 2006


re 17.7.2 - Am I right to say that the data definitions for parameter name 
and expression have to allow for "nulls". I ask with particular reference to 
problems 3 and 5 which seem to require a null parameter and a null 
expression respectively.

re 17.7.3 - Can I have an example of what is required as I don't 
sufficiently "get" the problem as it is set.


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