CSC 151 2019S, Class 09: Boolean values, predicate procedures, and conditionals

Overview

• Preliminaries
  • Notes and news
  • Upcoming work
  • Extra credit
  • Questions
• About exam 1
• Lab

Preliminaries

News / Etc.

• Mentor sessions Wednesday 8-9 p.m., Thursday 8-9 p.m., Sunday 5-6 p.m.
• The mentors want you to know that it’s relatively easy to find documentation for regular expressions online. (There are slight differences in RegExp syntax, but not many.)
• On Friday, I will distribute the final class code of conduct.
• Congrats to your classmate who I hear placed second on bar at a recent AAU gymnastics meet.
• I’m going to try to limit Q&A time so that we have enough time for lab.
• Advance warning! We’ll have a guest speaker at the start of class on Friday. We’ll have the quiz after she’s finished.

Upcoming work

• Readings due before class Friday
  • Documentation, revisited
  • Verifying preconditions
• Exam 1 due Tuesday night.
  • Details to be discussed later.
• Flash cards due Wednesday at 8:00 p.m.
  • Covers Wednesday/Friday/Monday classes
• Lab writeup due before class Friday.
  • Exercise: 5
  • Subject: CSC 151.01 Writeup for Class 9 (YOUR NAMES)
  • To: csc151-01-grader@grinnell.edu
• Quiz Friday
  • Regular expressions
  • List operations

Extra Credit

Extra credit (Academic/Artistic)

• Convo Thursday at 11 (JRC 101): John Hassard, founding associate director of the Institute for Security, Science, and Technology at Imperial College London, will present, “Envisioning the Post-Hydrocarbon World”
• CS Extras, Thursday, 4:15 p.m. Science 3821: Summer Code Camps. (Snacks at 4pm in the CS Commons.)
• Any Data Week activity this week.
• HackGC weekend of 15-17 February 2019. (I’m still looking for links.)

Extra credit (Peer)

• Conference Swim and Dive meet, 15-17 February 2019. Dive times to be announced later. (noon or 1, 7pm, Fri and Sat)
• Lunar New Year Celebration, 6pm February 17, Harris Gym

Extra credit (Wellness)

• HIIT training, 4:30 pm, Tuesday, Dance Studio, Bear. (Cap of two EC units.)
• HIIT training, 10:00 am, Saturday, Dance Studio, Bear
• Hatha Yoga, 7:00 pm, Tuesday, Dance Studo, Bear. (Cap of two EC units.)
• Brazilian Jiu-Itsu, Wednesday and Friday, 6:30, Dance Studio (cap of two EC units.)
• Any Sex Week activity this week. (If you don’t feel comfortable telling me about the particular activity, you can just say that you participated and give a vague reflection.)

Extra credit (Misc)

• Host a prospie! (Details forthcoming.)

Other good things

Questions

I’ve hosted a prospie already, can I get extra credit?

Sure.

What are the caps?

Complicated.

About Exam 1

Will you reward especially nice solutions?

Possibly. Probably.

What should our log look like?

; Time Log:
;   Date        Start   Finish  Elapsed Activity
;  2019-02-13   13:00   13:10   10      Read the problem, drew a picture
;  2019-02-15   13:00   13:30   30      Wrote a procedure that ...; watched X dive
;  2019-02-17   19:00   19:10   10      Wrapped up the work

; Time Spent: 50 minutes

Lab

How do I check if a string starts with a capital letter?

Use (regexp-match? pattern string) or (regexp-match-exact? pattern string)

What about “at the start of the word”?

See the p-words instruction. A caret not in the square brackets means “start of string” (or, sometimes, start of line”)

And “end of the string”?

Google says that $ is the regexp for end of string/line.