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Versions: 18
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Contents
module Bridge
class Card
include Comparable
attr_reader :card
# Creates a new card
def initialize(card)
@card = card.to_s.upcase
raise ArgumentError, "invalid card: #{card}" unless Bridge.card?(@card)
end
# Returns the suit of the card
def suit
card[0..0]
end
# Returns the suit of the card
def value
card[1..1]
end
# Returns the honour card points
def honour_card_points
(%w(J Q K A).index(value) || -1) + 1
end
alias :hcp :honour_card_points
# Compares the card with the other card
def <=>(other)
case other
when Card
raise ArgumentError, "comparing card of suit #{suit} with suit #{other.suit}" unless suit == other.suit
Bridge.compare_cards(self.card, other.card)
when String
self <=> Card.new(other)
else
begin
a, b = other.coerce(self)
a <=> b
rescue
end
end
end
def eql?(other)
self == other && other.instance_of?(Card)
end
def hash
card.hash
end
def coerce(other)
[Card.new(other.to_s), self]
end
def inspect
card.inspect
end
def to_s
card
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems