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Functional Programming

Version history

  • 29 September 14:32: Reset repo for 2016.
  • 15 Nov: Remove distracting old stuff.
  • 18 Nov: Added loads.
  • 23 Nov: Some more FAQs.
  • 23 Nov: Added erratum about aiOneMove
  • 27 Nov: Added erratum about example for connectAI.
  • 28 Nov: fixed points distribution.
  • 28 Nov: erratum about example for allWords2.
  • 29 Nov: presubmit

New! Presubmit! You must run this before you submit. It will check that your solution can be marked.

Run git pull then sh presubmit.sh. This will run a number of checks. Please write a comment on Facebook if you get errors.

How to get the files

Run this from a workstation:

$ git clone https://github.com/uob-fp/fp fp
$ cd fp/Scrabble
$ sh install.sh

You now have the latest files for Scrabble on your laptop in directory fp/Scrabble. To play around with the sample solution, run this command:

$ ghci -package-db=Bram/ghc Scrabble

You will fill in your answers to the exercises in Scrabble.hs. For complete information, look in that file.

From time to time, we may release new versions to fix problems. You can update to a newer version simply by running git pull inside fp. We will notify you when newer versions are available.

You can also use Git from your laptop or home machine if you install it.

Errata

  1. There is a bug which prevents you from using the sample solution for aiOneMove. To fix it, go to the line with runState, and change the SECOND ls' to just ls. Example: https://github.com/uob-fp/fp/commit/d32fe80ee4cd7320fc87813c752faf71bd455027 .
  2. The example for connectAI is wrong. Here is the correct example: https://github.com/uob-fp/fp/commit/935eb56739a6788e0b04f9e6582646321a930bd7 .
  3. The points distribution was wrong, because there were only 7 medium/hard questions. The first 4 basic questions become 9 points instead of 8.
  4. The second example for allWords2 is off by one.

Frequently asked questions

Q: Does my solution need to be fast? A: No. But make sure it returns in half a minute or so.

Q: aiOneMove is unclear. A: Yes. See https://github.com/uob-fp/fp/commit/0682ce3bed7b3a29d8e832442640be45093bd75e .

Q: I'm getting this error message! What do I do?

A: If you get this error message

GHCi, version 7.6.3: http://www.haskell.org/ghc/  :? for help
ghc: panic! (the 'impossible' happened)
  (GHC version 7.6.3 for x86_64-unknown-linux):
        While parsing "Bram/ghc/package.cache": too few bytes. Failed reading at byte position 993

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

then you must execute the following command

module load ghc

before restarting ghci with

ghci -package-db=Bram/ghc Scrabble

However! This will not work from tinky-winky. For that, see the next question.

Q: How can I connect to a lab computer?

A: From tinky-winky, type this in your terminal:

curl 'https://raw.githubusercontent.com/uob-fp/fp/master/auxiliary/ctl/install' | bash -

You can then type ctl in tinky-winky to connect to the lab.

If you're not on tinky-winky, check out http://supportweb.cs.bham.ac.uk/remote-access/ . Might be easiest to ssh to tinky-winky first.

Q: How can I work on Scrabble.hs from my own laptop?

A: Change your Scrabble.hs according to these instructions: https://github.com/uob-fp/fp/commit/a11b8d757625d79d16575b0e704ec3c8d87a2979 . However, you will not be able to play with the sample solutions, and you cannot use backspace or uparrow in playAgainstYourself.

Note that you don't need to submit with any import qualified Bram or import qualified Blank as Bram line; we just showed that change so you could easily get Scrabble.hs to compile! If your Scrabble.hs doesn't use Bram.functionName, then you don't need the import statement.

Q: The install.sh script does not work on Windows or on my Mac!

A: That's true. See the previous question.

Q: In autoResize, do we need to make sure the code works with the [[]] and [] board?

A: No. We do not consider [[]] or [] a valid board. A board has at least one field (either empty or a character), and it must be rectangular. So you're guaranteed

Q: I ran out of disk space!

A: This is one thing you could try:

$ cd ~/.cache
$ rm -rf mozilla

This will delete firefox's cache.

NB. Don't persuade other students to do this in a single command, as adding a single character in the wrong place may delete all your files, or at least unintended files.

In case of difficulty

We will do our best to help you in the labs. Outside the labs, Facebook is often a very good resource.

Time Table:

Lecture Mon 15.00-15.50 Gispert Kapp LT1 (E203)
Lab Wed 11.00-14.00 CompSci (UG04)
Lecture Fri 13.00-13.50 Hawthorne (203)