History of Lab on Local Bindings

Monday, 2 October 2000 [Samuel A. Rebelsky]

• Created. Many of the problems were taken from http://www.cs.grinnell.edu/~stone/courses/scheme/spring-2000/local-bindings.xhtml
• This version is available as http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2000S/Labs/local-bindings.html

Wednesday, 28 February 2001 [Samuel A. Rebelsky]

• Removed a problem created last semester but inappropriate for this semester's class.
• Added comments in the longest string exercise and fixed some errors that I'd introduced into that exercise. (Bad Sam!)
• Added exercises 6 and 7 (further followups on the longest string exercise).
• Updated formatting.

Thursday, 1 March 2001 [Samuel A. Rebelsky]

• Updated problem 2 to use the names alpha to epsilon rather than a to e because the a was too frequently read as an article rather than a name.
• This version is available as http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2001S/Labs/let.html.

Monday, 7 October 2002 [Samuel A. Rebelsky]

• Updated slightly.

Tuesday, 8 October 2002 [Samuel A. Rebelsky]

• Inserted exercise 4 (a simple test of local procedures).

Wednesday, 9 October 2002 [Samuel A. Rebelsky]

• Updated final problem slightly (clarified what the procedure should do if the preconditions were not met).
• This version is available as http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2002F/Labs/let.html.

Sunday, 2 February 2003 [Samuel A. Rebelsky]

• Replaced the longest-string-on-list problems with longest-list-in-list.
• Added extra work for those who finish early.
• This version is available as http://www.cs.grinnell.edu/~rebelsky/Courses/CS153/2003S/Labs/let.html.

Thursday, 9 September 2003 [Samuel A. Rebelsky]

• Added summary.
• This version is available as http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2003F/Labs/let.html.

Tuesday, 26 September 2006 [Samuel A. Rebelsky]

• Added link to PDF version.
• Added a variety of problems, mostly having to do with ordering lets and lambdas.
• Moved history to a separate file.
• This version is available as http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2006F/Labs/let.html.

Thursday, 15 February 2007 [Samuel A. Rebelsky]

• Removed a problem having to do with input and output.
• Added yet another ordering problem.
• Added the closest-to-zero problem.
• Removed an extra problem on timing.
• Moved one of the problems on longest-in-list to the extra section.
• This version is available as http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2007S/Labs/let.html.

Saturday, 13 October 2007 [Samuel A. Rebelsky]

• Significant rewrite for media computing class.
  • Early "nesting lets" problem now deals with colors.
  • Removed many problems, particularly those having to do with longest lists in a list of lists, which tended to confuse students.
  • Added new blend problem.
  • Added new "For those with extra time" problems on leftmost spots.
• Removed dependency on the verbose versions of let, let star, and the ilk, since those are no longer available here (and I'm not sure that I want to take the time to rewrite them).

Sunday, 14 October 2007 [Samuel A. Rebelsky]

• Minor cleanup after practice run-through with lab.
• This version is available as http://www.cs.grinnell.edu/~rebelsky/Courses/CS151/2007F/Labs/let-lab.html.