History of Pairs Reading

Friday, 21 February 1997 [Henry Walker and John David Stone]

• Created as joint reading/lab.

Friday, 17 March 2000 [Henry Walker and John David Stone]

• Last update by Walker and Stone.
• This version is available at http://www.cs.grinnell.edu/~stone/courses/scheme/spring-2000/pairs.xhtml.

Monday, 18 September 2000 [Samuel A. Rebelsky]

• Moved the narrative/reading portion to a separate document.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2000F/Labs/pairs.html.

Wednesday, 21 February 2001 [Samuel A. Rebelsky]

• Reformatted.
• Added a note on exercise 5 (now exercise 8).
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2001S/Labs/pairs.html.

Sunday, 29 September 2002 [Samuel A. Rebelsky]

• Updated exercises 2 and 3 slightly.
• Updated formatting slightly.
• Added new exercises 5 and 6 (listp? and number-tree?).
• Added the If You Have Extra Time section.

Monday, 30 September 2002 [Samuel A. Rebelsky]

• Added the sum-of-number-tree problem (currently problem 7).
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2002F/Labs/pairs.html.

Wednesday, 12 February 2003 [Samuel A. Rebelsky]

• Fixed code for sum-of-number-tree (whoops!).
• Added alt tag to image.
• Noted that the HTML is valid.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS153/2003S/Labs/pairs.html.

Monday, 3 March 2003 [Samuel A. Rebelsky]

• No real changes.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2003S/Labs/pairs.html.

Monday, 13 October 2003 [Samuel A. Rebelsky]

• Added introductory summary.
• Updated problem 0.
• Excised all deep recursion problems.
• Added the extra last problem.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2003F/Labs/pairs.html.

Sunday, 8 Octboer 2006 [Samuel A. Rebelsky]

• Added link to PDF version.
• Other, unknown changes.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2006F/Labs/pairs.html.

Sunday, 11 March 2007 [Samuel A. Rebelsky]

• Minor cleanup.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2007S/Labs/pairs.html.