Notes for week 7 modules

Links:

• Chapter 7 agenda
• Online chapter
• How to write a Haskell Program

Exercises:

Question 1

Hide foldr and foldl.

Question 2

What is the standard directory structure for a Haskell project?

Question 3

Run the function 'l16' in week7.hs to print out:

[1]:selectf (borrower)
---------------------
|cstmr-name|loan-num|
---------------------
|Adams     |L-16    |
---------------------

To do this you'll need to complete the export specification which includes a data type constructor and any functions in the module RelationalAlgebra.hs.

This includes:

• Any imports,
• Types:
• Records is an Array of Record
• Record is an Array of Value
• Schema is an Array of Fields
• Value, Field and Name are Strings
• The datatype Table derives Eq and Show and is made of a Name, a Schema and Records.
• Any functions required by week7.hs.

Questions raised during the group:

Answers to Exercises:

Interesting Asides

• Question 2 inspired by this post on a Haskell project http://news.ycombinator.com/item?id=3390786
• Steve Yegge in Execution in the Kingdom of Nouns
• Neal Ford on "Functional Thinking"