Author

Rob Olson

Email

first name

at

thinkingdigitally.com

GitHub

github.com/robolson/ruby-poker

Ruby-Poker handles the logic for getting the rank of a poker hand. It can also be used to compare two or more hands to determine which hand has the highest poker value.

Card representations can be passed to the PokerHand constructor as a string or an array. Face cards (cards ten, jack, queen, king, and ace) are created using their letter representation (T, J, Q, K, A).

gem install ruby-poker

require 'rubygems'
require 'ruby-poker'

hand1 = PokerHand.new("8H 9C TC JD QH")
hand2 = PokerHand.new(["3D", "3C", "3S", "KD", "AH"])
puts hand1                => 8h 9c Tc Jd Qh (Straight)
puts hand1.just_cards     => 8h 9c Tc Jd Qh
puts hand1.rank           => Straight
puts hand2                => 3d 3c 3s Kd Ah (Three of a kind)
puts hand2.rank           => Three of a kind
puts hand1 > hand2        => true

By default ruby-poker will not raise an exception if you add the same card to a hand twice. You can tell ruby-poker to not allow duplicates by doing the following

PokerHand.allow_duplicates = false

Place that line near the beginning of your program. The change is program wide so once allow_duplicates is set to false, all poker hands will raise an exception if a duplicate card is added to the hand.

Ruby-Poker is compatible with Ruby 1.8, Ruby 1.9, and Ruby 2.X.

View the generated documentation for ruby-poker on rdoc.info.

bundle exec rake

There is also a more compreshenive test, testing all permuations of poker hands, but it requires a large data file that must be downloaded first.

wget -P ./test/support/fixtures http://archive.ics.uci.edu/ml/machine-learning-databases/poker/poker-hand-testing.data
bundle exec rake test:integration

In the 0.2.0 release Patrick Hurley’s Texas Holdem code from www.rubyquiz.com/quiz24.html was merged into ruby-poker.

This is free software; you can redistribute it and/or modify it under the terms of the BSD license. See LICENSE for more details.