History of Reading on Conditionals

Sunday, 2 September 1997 [John David Stone]

• First version of a combined reading on Lists, Booleans, and predicates.
• This version available at http://www.math.grin.edu/~stone/courses/scheme/fall-1997/lists.html.

Friday, 7 September 1997 [John David Stone]

• First version of conditionals reading.
• This version available at http://www.math.grin.edu/~stone/courses/scheme/fall-1997/conditional-evaluation.html.

Friday, 17 March 2000 [John David Stone]

• Last update in the Stone branches before the Rebelsky branch.
• Latest version of procedure definitions reading (now incorporating conditionals and predicates) available at http://www.math.grin.edu/~stone/courses/scheme/spring-2000/procedure-definitions.xhtml.
• Latest version of conditionals available at http://www.math.grin.edu/~stone/courses/scheme/spring-2000/conditional-evaluation.xhtml.

Wednesday, 6 September 2000 [Samuel A. Rebelsky]

• Merged the Boolean and predicates into the conditionals.
• Extracted exercises from Stone's combined reading/lab.
• Revised the exericses.

Friday, 8 September 2000 [Samuel A. Rebelsky]

• Fixed some problems.
• Added new exercise on classifying data.
• Added links to readings.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151//2000F/Labs/conditionals.html.

Wednesday, 31 January 2001 [Samuel A. Rebelsky]

• Added the getting started step.
• Added new problem on calling and and or with no parameters.

Thursday, 1 February 2001 [Samuel A. Rebelsky]

• Added many new problems (taken from an an earlier lab on basic types).
• Updated formatting.
• A few minor changes.
• Adding links to references.
• Added notes on new problem on calling and and or with no parameters.

Wednesday, 7 February 2001 [Samuel A. Rebelsky]

• Closed a parenthesis in 14.e
• Clarified 16
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151//2001S/Labs/conditionals.html.

Tuesday, 10 September 2002 [Samuel A. Rebelsky]

• Updated formatting slightly.
• Updated links to point to the Glimmer Scheme Reference.
• Added introductory phrase and list of procedures.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151//2002F/Labs/conditionals.html.

Tuesday, 28 January 2003 [Samuel A. Rebelsky]

• Added link to the Scheme Report.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS153//2003S/Labs/conditionals.html.

Tuesday, 4 February 2003 [Samuel A. Rebelsky]

• Added note to problem on triangle?.
• Added examples to exercise 18.
• Added more investigation to and/or exercise.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151//2003S/Labs/conditionals.html.

Monday, 15 September 2003 [Samuel A. Rebelsky]

• Updated the first problem to make it clear that filling in the entire table is pointless.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151//2003F/Labs/conditionals.html.

Saturday, 9 September 2006 [Samuel A. Rebelsky]

• Significant rewrite (not all changes necessarily described).
• Removed all problems that describe the basics of Boolean values (those problems are now in the Boolean values lab at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151//2006F/Labs/boolean.html.
• Wrote the type-of problem (without first realizing that I'd written a similar problem) and then deleted the old version.
• Rewrote most problems.
• Added date problem. (Suggested by Janet Davis.)
• Added alternate version of disparity problem. (The idea was suggested by Janet Davis, although not as a problem.)
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151//2006F/Labs/conditionals.html.

Sunday, 4 February 2007 [Samuel A. Rebelsky]

• Adedd prehistory and some links to labs in the Rebelsky branch.
• Moved history to a separate file.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151//2006F/Labs/conditionals.html.

Monday, 5 February 2007 [Samuel A. Rebelsky]

• Removed a problem that asks students to rewrite disparity (the discussion is now in the reading).
• Added links to and from the notes on problem 5. (The notes were there, but the links were not.)
• Moved the last few problems to a For Those With Extra Time section.
• Other, minor, cleanup.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151//2007S/Labs/conditionals.html.

Tuesday, 18 September 2007 [Samuel A. Rebelsky]

• Complete rewrite from scratch for the image-based 151. All new problems!

Wednesday, 19 September 2007 [Samuel A. Rebelsky]

• Added a line-drawing problem.
• Added a trianble problem.
• Updated instructions for drawing shapes.
• This version available at http://www.cs.grinnell.edu/~rebelsky/Courses/CS151//2007S/Labs/conditionals.html.