Class: Card

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
lib/card.rb

Constant Summary collapse

SUITS = 
"cdhs"
FACES = 
"L23456789TJQKA"
SUIT_LOOKUP = 
{
  'c' => 0,
  'd' => 1,
  'h' => 2,
  's' => 3,
  'C' => 0,
  'D' => 1,
  'H' => 2,
  'S' => 3,
}
FACE_VALUES = 
{
  'L' =>  1,   # this is a magic low ace
  '2' =>  2,
  '3' =>  3,
  '4' =>  4,
  '5' =>  5,
  '6' =>  6,
  '7' =>  7,
  '8' =>  8,
  '9' =>  9,
  'T' => 10,
  'J' => 11,
  'Q' => 12,
  'K' => 13,
  'A' => 14,
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*value) ⇒ Card

Returns a new instance of Card.



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# File 'lib/card.rb', line 70

def initialize(*value)
  if (value.size == 1)
    if (value[0].respond_to?(:to_card))
      build_from_card(value[0])
    elsif (value[0].respond_to?(:to_str))
      build_from_string(value[0])
    elsif (value[0].respond_to?(:to_int))
      build_from_value(value[0])
    end
  elsif (value.size == 2)
    if (value[0].respond_to?(:to_str) &&
        value[1].respond_to?(:to_str))
      build_from_face_suit(value[0], value[1])
    elsif (value[0].respond_to?(:to_int) &&
           value[1].respond_to?(:to_int))
      build_from_face_suit_values(value[0], value[1])
    end
  end
end

Instance Attribute Details

#face ⇒ Object (readonly)

Returns the value of attribute face.



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# File 'lib/card.rb', line 90

def face
  @face
end

#suit ⇒ Object (readonly)

Returns the value of attribute suit.



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# File 'lib/card.rb', line 90

def suit
  @suit
end

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/card.rb', line 90

def value
  @value
end

Class Method Details

.face_value(face) ⇒ Object 



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# File 'lib/card.rb', line 31

def Card.face_value(face)
  if (face)
    FACE_VALUES[face.upcase] - 1
  else
    nil
  end
end

Instance Method Details

#<=>(card2) ⇒ Object

Compare the face value of this card with another card. Returns: -1 if self is less than card2 0 if self is the same face value of card2 1 if self is greater than card2



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# File 'lib/card.rb', line 109

def <=> card2
  @face <=> card2.face
end

#==(card2) ⇒ Object Also known as: eql?

Returns true if the cards are the same card. Meaning they have the same suit and the same face value.



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# File 'lib/card.rb', line 115

def == card2
  @value == card2.value
end

#hash ⇒ Object

Compute a hash-code for this Card. Two Cards with the same content will have the same hash code (and will compare using eql?).



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# File 'lib/card.rb', line 122

def hash
  @value.hash
end

#to_card ⇒ Object

If to_card is called on a Card it should return itself



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# File 'lib/card.rb', line 101

def to_card
  self
end

#to_s ⇒ Object

Returns a string containing the representation of Card

Card.new(“7c”).to_s # => “7c”



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# File 'lib/card.rb', line 96

def to_s
  FACES[@face].chr + SUITS[@suit].chr
end