Overview

• Preliminaries.
  • Admin.
  • Upcoming Work.
  • Extra Credit.
  • Questions.
• Lab.

Preliminaries

Admin

• New partners.
• The food I brought for today seems to have disappeared.

Reminders

• Office hours this week
  • See http://rebelsky.youcanbook.me.
  • Ask me about other available times.
• Tutor hours
  • Sunday, 3-5 p.m.
  • Sunday-Thursday, 7-10 p.m.
• Review Sessions
  • Wednesday at 8pm in CS commons with Sarah
  • Thursday at 10 am with SamR
  • Thursday at 8pm in CS commons with Kumar

Upcoming Work:

• NO READING FOR TUESDAY!
• Lab Writeup: Exercise 4
  • Send email titled CSC 151 Lab Writeup 49 (Your Names)
  • Do not include the underscores.
  • Send to CSC151-02-grader@grinnell.edu
  • Due before class on Monday.
• Projects due tomorrow night at 10:30 p.m..
• Exam 4 to be distributed tomorrow.
• Exam 3 hopes to be returned Wednesday.

Extra Credit

• Send your reports to rebelsky@grinnell.edu with subject "CSC 151 Extra Credit". (Do not include the quotation marks.)
• Send opportunities to me before class with subject "CSC 151 EXTRA CREDIT OPPORTUNITY!"

Academic / Artistic

• Scholars' Convocation: Dutch Global Horizons, Thursday, April 28, 11 am, JRC 101
• Damon Williams: Bigger Than The Cops, April 28, 4pm or 5:15 pm
• Met Opera, Saturday, April 30, talk at 11:30, Opera at noon.

Peer

• Friday, Break Beat Poets performing behind Eco House at 4:30 p.m.
  • Eco house is across from Cleveland.
• Maybe GMon, Thursday, 7:30 p.m., Loose Lounge.
• Rushdie's East/West, May 6/7 at 7:30 p.m.

Regular Peer

• Social Dance Workshop Tuesdays 7:00-8:00 in Bucksbaum Dance Studio
• Post-break ExCo on British Politics Wednesdays at 8:00 in JRC 203.
  Just show up; you don't need to sign up.
• Pun club Saturdays at 4pm in Younker
• Electronic Potpourri on KDIC Fridays at Five
• Space Odyssey KDIC Fridays at Six
• Bollywood, Fridays, 7:30-8:30, Younker
• Effective Altruism club, 2:30-3:30 Sundays in JRC 226.

Misc

Not for Extra Credit

Questions

When is the final?

Thursday of finals week, 9am-noon.

Is it optional?

Yes.

Will we know something about our grade before then?

Yes. Grades will be distributed Sunday before finals.

Will it be an in-class final?

Yes.

Will we get a sample?

Yes.

My turtle doesn't work when the drawing is smaller than 50x50. What should I do

Document the issue. It's okay.

Can the final hurt us?

Your brain may hurt. It will not hurt your grade.

What are my options if I have a conflicting final?

I think the other class's final is Wednesday, 2-5 pm.

Can you get the brush size to change?

It works with some brushes, but not others. Ask JS the elder for help.

How does the final work?

It replaces the lowest exam grade, provided the final is higher than the lowest exam grade.

Q

Yes.

Lab

What's better?

(compose car cdr cdr cdr cdr cdr)
(r-s list-ref 5)
(lambda (entry) (list-ref entry 5))
(compose caddr reverse)

Writeup 49: Exercise 4

• Hint: Think about the values of lower-bound and upper-bound when you decide the value is not there.