Overview

• Preliminaries.
  • Admin.
  • Upcoming Work.
  • Extra Credit.
  • Questions.
• What is a procedure?
• Describing procedures.
• Anonymous procedures.
• Anonymous procedures through lambda expressions.
• Other kinds of anonymous procedures.

Preliminaries

Admin

• New partners!
• Prof. Curtsinger will be teaching class for the rest of the week.
  • If anyone wants to take notes for eboards, I'll provide extra credit.
• Things I owe you.
  • I will mail you your exams on Tuesday night.
  • I will mail you sample answers to HW4 and HW5 on Wednesday night.
  • I will mail you current grades later in the week.
• Some of you have been asking whether you have to be in class on the day before spring break. I know that the end of the day right before break is a horrible time. You can miss class. However, (a) you should arrange to take the quiz on Thursday and (b) I will still record it as an excused absence.

Reminders

• Office hours this week: M 10-11
  • Sign up at http://rebelsky.youcanbook.me.
  • I'll do a lot of email or text Q&A this week.
• Tutor hours
  • Sunday, 3-5 p.m.
  • Sunday-Thursday, 7-10 p.m.
• Weekly review sessions:
  • Wednesday at 8pm in the CS Commons with
  • No Thursday review session next week .... )-:
  • Thursday at 8pm in the CS Commons with

Upcoming Work:

• Reading for Tuesday
  • Building Images by Iterating Over Positions
• Exam 2 to be distributed on Wednsday.
• Lab Writeup: Exercise 5cdef
  • Send email titled CSC 151 Lab Writeup 21 (Your Names)
  • Do not include the underscores.
  • Send to CSC151-02-grader@grinnell.edu
  • Due before class on 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

• Wes Moore talk tonight at 7:00 in Bucksbaum on leading a meaningful life.
• CS Table, Tuesday, Apple vs. the FBI.
• Met Opera Simulcast, Saturday, March 5.

Peer

• Vote for SGA positions. (Today)
• Pub Quiz Wednesday at 10, hosted by Neuro/Psych SEPC. You can eat food, or pay to participate in the quiz ($3/team).

Regular Peer

• Social Dance Workshop Tuesdays 7:00-8:00 in Bucksbaum Dance Studio
• Pun club Saturdays at 4pm in Younker
• Electronic Potpourri on KDIC Fridays at Five
• Space Odyssey KDIC Fridays at Six

Misc

• Christine Tran show in Smith Gallery.
• Thursday evening Pub talk on Plans - Grinnell's own contribution to social media

Far in the Future

• Lords of the Flies, April.

No Extra Credit, But Still Good

Questions

How do we document procedures defined within lets?

(let (; (square x) - squares x. duh [square (lambda (x) (* x x))])

But I'm also okay if you don't document, as long as the name is clear.

And if they are anonymnous, don't worry about it at all.

Lab

(l-s - 5) => (section - 5 <>) (r-s - 5) => (section - <> 5)

Writeup: 5cdef (class 21)