IPRUG Ruby Golf 2013

IPRUG, 2 April 2013

Time for another Ruby golf challenge – can you pare your code down to fewer characters than everyone else?

There will be nine "holes" to complete. I'll provide the tests to describe them on the night, to stop anyone getting a head start. And because I haven't written them yet.

The winner is whoever gets the lowest total score for all nine, or if no-one finishes then the lowest total for the furthest hole (if that makes sense). No prizes I'm afraid, apart from the admiration of your peers.

Requirements

Ruby 1.9.3 (any patchlevel, but has to be 1.9.3 so everyone's on a level playing field in terms of language features).

Setup

Before you turn up (to avoid having to download everything on the night over dodgy wifi):

git clone https://github.com/kerryb/iprug-rubygolf-2013.git
cd iprug-rubygolf-2013
gem install bundler
bundle

You'll probably want to grab an offline copy of the Ruby core API docs too.

Testing

Run rake, and you should see something like this:

$ rake
ruby -S rspec ./spec/golf_spec.rb
FFFFFFFFF

Failures:

  1) Golf.hole_1 needs a problem to solve
     Failure/Error: fail
     RuntimeError:
     # ./spec/golf_spec.rb:6:in `block (3 levels) in <top (required)>'

  # ... more failure messages ...

Finished in 0.00355 seconds
9 examples, 9 failures

Failed examples:

rspec ./spec/golf_spec.rb:5 # Golf.hole_1 needs a problem to solve
rspec ./spec/golf_spec.rb:11 # Golf.hole_2 needs a problem to solve
rspec ./spec/golf_spec.rb:17 # Golf.hole_3 needs a problem to solve
rspec ./spec/golf_spec.rb:23 # Golf.hole_4 needs a problem to solve
rspec ./spec/golf_spec.rb:29 # Golf.hole_5 needs a problem to solve
rspec ./spec/golf_spec.rb:35 # Golf.hole_6 needs a problem to solve
rspec ./spec/golf_spec.rb:41 # Golf.hole_7 needs a problem to solve
rspec ./spec/golf_spec.rb:47 # Golf.hole_8 needs a problem to solve
rspec ./spec/golf_spec.rb:53 # Golf.hole_9 needs a problem to solve

  +--------+---------+---------+
  |  Hole  |  Shots  |  Total  |
  +--------+---------+---------+
  |    1   |  Failed |   ----  |
  +--------+---------+---------+
  |    2   |  Failed |   ----  |
  +--------+---------+---------+
  |    3   |  Failed |   ----  |
  +--------+---------+---------+
  |    4   |  Failed |   ----  |
  +--------+---------+---------+
  |    5   |  Failed |   ----  |
  +--------+---------+---------+
  |    6   |  Failed |   ----  |
  +--------+---------+---------+
  |    7   |  Failed |   ----  |
  +--------+---------+---------+
  |    8   |  Failed |   ----  |
  +--------+---------+---------+
  |    9   |  Failed |   ----  |
  +--------+---------+---------+

Rules

• No editing of any file apart from lib/golf.rb
• All code must go in the methods that are already there (hole_1 etc)
• No extra classes or methds, evaluation of other files or any other creative cheating
• The def ... line and the final end of each method don't count towards the score
• Whitespace does count, apart from newlines and indentation