CSC302 2007S, Class 25: Discussion of Mid-Semester Examination

Admin:
* Three readings for Wednesday: 
  (a) A Quick (and Hopefully Painless) Ride Through Ruby (with Cartoon Foxes);
  (b) Chapter 1 of A Little Ruby, A Lot of Objects;
  (c) Chapter 2 of A Little Ruby, A Lot of objects
* Since there were significant problems on the exam, we should decide 
  what to do about those problems.
  * More class time going over the exam?
  * More credit for those closer to 75?
* Why are there no CS t-shirts?

Overview:
* General Issues.
  * Bad citations
  * No citations
  * Sam is trying to leave as little on the Web as possible
* Problem 1.
  SOME OF YOU WROTE, NOT NECESSARILY CORRECTLY
  In Algol, if can have form
    if test then goto X

* Problem 2.
  * Significant misunderstanding
    (define proc body)
    * Usually
      (define proc (lambda (params) body))
    * One point of HOP is that the lambda is unnecessary
      Instead of (define add2 (lambda (x) (+ 2 x)))
      Write (define add2 (l-s + 2))
* Sam expected
  (define curry2 ...)
  (define no-inexact-odds ...)
  (define selector ...)
* In many cases, Sam got
  (define (curry2 x y) ...)
* Problem 3.
  * Yay, fun coding
* Problem 4.

Be prepared to answer the following two questions on Wednesday

(1) Given that I care about you learning / understanding the material,
what can I do to help with that?

(2) Given that grades should be secondary to (1), what should I do
about the grades?

The Ruby readings are now due Friday, but start them soon anyway.