History of the Reading on Local Bindings and Recursion

March 2, 1997 [John David Stone]

• Created

March 17, 2000 [John David Stone]

• Last revised by Mr. Stone.
• This version available at http://www.cs.grinnell.edu/~stone/courses/scheme/spring-2000/local-binding-and-recursion.xhtml.

24 October 2000 [Samuel A. Rebelsky]

• Removed problems.
• Reformatted.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2000F/Readings/letrec.html

Sunday, 11 March 2001 [Samuel A. Rebelsky]

• Reformatted (including new section headings).
• Added alternate code to explain letrec.
• Added 6 P's and comments to code.
• A few minor changes to the text.

Monday, 9 April 2001 [Samuel A. Rebelsky]

• Fixed an inconsistency in the different versions of index (some returned #f on failure, some returned -1).
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2001S/Readings/letrec.html

Tuesday, 15 October 2002 [Samuel A. Rebelsky]

• Updated formatting slightly.
• Updated the produces and postconditions sections for some procedures.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2002F/Readings/letrec.html

Sunday, 2 February 2003 [Samuel A. Rebelsky]

• Copied into the CS153 course web.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS153/2003S/Readings/letrec.html

Tuesday, 25 February 2003 [Samuel A. Rebelsky]

• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2003S/Readings/letrec.html

Tuesday, 26 September 2006 [Samuel A. Rebelsky]

• Added link to PDF version.
• Other minor cleanup.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2006F/Readings/letrec.html

Saturday, 13 October 2007 [Samuel A. Rebelsky]

• Replaced some examples to correspond to similar examples in other readings.
• Other, minor, cleanup.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2007F/Readings/letrec-reading.html