Lecture 13

Lecture 13: Haskell
Date: Friday, October 4, 2019

Agenda

Announcements
- Problem Set 1 grades are up, please take a look, make sure all is accurate and that you understand those things that weren't quite right
- Problem Set 3: [HTML] [PDF] finish up if you haven't
- Problem Set 4: [HTML] [PDF] due in a little over a week
- Coming soon: evening exam on Monday, October 14, available 6-10 PM, take any 2 hours
New reading and group assignment: Sebesta Ch. 5, see your email for the link to the shared document to edit
In-class review exercise on Haskell so far
1. Given the list a = [1,2,3,4,5], what is the result of each of the following?
```
length a
head a
tail a
init a
last a
```
2. Given a list a, how would you do each of the following?
  - retrieve the 3rd element of the list
  - generate a new list which has all of the list elements of a followed by another copy of all of the list elements of a
  - generate a new list which has the same elements as a, but rotated right by 2, so [1,2,3,4,5] would become [4,5,1,2,3].
3. Write a function to compute the area of a circle, given its radius
More Haskell from Learn You a Haskell for Great Good!
- list comprehensions
  - filtering
- tuples
  - basic idea
  - fst, snd
  - zip

Terminology