Outline 39: Pause for Breath

Held: Tuesday, 10 November 2015

Summary

Related Pages

Overview

Administrivia

Continue partners!
We will finish the Vectors lab today and do the Trees lab another day.
Review sessions this week:
- Wednesday, 8pm (Caleb)
- Thursday, 10am (SamR)
- Thursday, 8pm (Erin)
Office hours this week and next: MWF 8:30-9:00, 11:00-11:45, 1:00-2:00; Tu 1:00-2:00.
I am home sick today. Because of that, you have an extension on the exam until Thurday night. When I have a chance, I will answer questions sent via email.
When asking for help, it's important that you choose your procedure and variable names well, and that you document your procedures a bit. Neither I nor the tutors appreciate the overhead of dealing with something like
```
(define fiddledidee
  (lambda (a b)
    (let kernel ([thinga ""]
                 [mabob (cons a b)])
      ...)))
```
I've gotten reinforcement that Problem 5 is really easy once you think it through (of course, the statement was preceded by "Sam, you are evil").
So, to reiterate the Q&A section:
- for-each typically takes a procedure and a list as parameters.
- Think about the form of the list that you will give as an argument to for-each in this problem.
- Think about what type of value the procedure you give as an argument to for-each will take as its input.
- For example, what do you know about x in (for-each (lambda (x) ...) (iota 10))?

Readings for Wednesday:
Elements and Principles of Two-Dimensional Design and About the Project
Today's Lab writeup (due before class Friday)
- Email to grader-151-01@cs.grinnell.edu
- Subject: CSC 151 Lab Writeup Class 38 (Your Names)
- Exercises:

Pals of PALS, pals@grinnell.edu, normally Saturday at 7:45 am (breakfast included; felines only), and Mondays at 4:45. Requires sign up in advance. MORE HELP NEEDED!
Socrates Cafe', Saturdays, Younker, 2pm.
Pun Club, Saturdays, 4pm, Way over Younker.