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From: bh@anarres.CS.Berkeley.EDU (Brian Harvey)
Newsgroups: comp.lang.logo
Subject: New "Logo-like" Scheme-based text
Date: 23 Jan 1994 18:34:21 GMT
Organization: University of California, Berkeley
Lines: 53
Message-ID: <2hufvd$dar@agate.berkeley.edu>
NNTP-Posting-Host: anarres.cs.berkeley.edu

Fans of _Computer Science Logo Style_ might be interested in a new text:

	Simply Scheme: Introducing Computer Science
	Brian Harvey and Matthew Wright

Scheme is the language in which Logo-style computer science education
is mostly done at the college level.  Our Scheme book relies on many
ideas carried over from Logo:

	* We've implemented the Logo word and sentence operations
	  (first, butfirst, etc.) in Scheme so that some of the
	  classic Logo examples, like Pig Latin, are available.

	* Procedure calling is explained using the "little people" model.

	* The treatment of recursion is similar to that in CSLS, taking
	  up several chapters, but reorganized for greater clarity.
	  (Look for a similar reorganization when I get the second
	  edition of CSLS done!)

But there are also differences, reflecting the nature of Scheme:

	* Functional programming is emphasized.  (Imagine Logo with
	  no commands, only operations.)

	* Scheme procedures are a first-class data type.  We make
	  heavy use of higher-order procedures (procedures that take
	  other procedures as inputs, similar to MAP and FILTER in
	  CSLS).

Because we wrote the book for a course at Berkeley that's taken by
non-computer-science majors, such as businessoids, we conclude with
"practical" programs: a spreadsheet program that we write as an
example, and a database program that the reader writes as a project.


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