Class: Fractify::Operator

Inherits:
Object
  • Object
show all
Defined in:
lib/fractify/operator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(operator_character, rank, to_left = nil, to_right = nil) ⇒ Operator

Returns a new instance of Operator.



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# File 'lib/fractify/operator.rb', line 8

def initialize(operator_character, rank, to_left = nil, to_right = nil)
  if to_left && !to_left.is_a?(Fractify::Fraction) || to_right && !to_right.is_a?(Fractify::Fraction)
    raise IncorrectArgumentsError
  end

  self.operator_character = operator_character
  self.rank = rank
  self.to_left = to_left
  self.to_right = to_right
  self.executed = false
end

Instance Attribute Details

#executed ⇒ Object

Returns the value of attribute executed.



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# File 'lib/fractify/operator.rb', line 6

def executed
  @executed
end

#operator_character ⇒ Object

Returns the value of attribute operator_character.



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# File 'lib/fractify/operator.rb', line 6

def operator_character
  @operator_character
end

#rank ⇒ Object

Returns the value of attribute rank.



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# File 'lib/fractify/operator.rb', line 6

def rank
  @rank
end

#to_left ⇒ Object

Returns the value of attribute to_left.



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# File 'lib/fractify/operator.rb', line 6

def to_left
  @to_left
end

#to_right ⇒ Object

Returns the value of attribute to_right.



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# File 'lib/fractify/operator.rb', line 6

def to_right
  @to_right
end

Instance Method Details

#<=>(other) ⇒ Object

Raises:



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# File 'lib/fractify/operator.rb', line 20

def <=>(other)
  raise IncorrectArgumentsError unless other.is_a? Fractify::Operator
  return 0 if rank == other.rank
  return 1 if rank > other.rank

  -1
end

#decrease_rank!(number = 1) ⇒ Object 



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# File 'lib/fractify/operator.rb', line 32

def decrease_rank!(number = 1)
  @rank -= number
end

#executed! ⇒ Object 



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# File 'lib/fractify/operator.rb', line 40

def executed!
  self.executed = true
end

#executed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fractify/operator.rb', line 44

def executed?
  executed
end

#increase_rank!(number = 1) ⇒ Object 



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# File 'lib/fractify/operator.rb', line 36

def increase_rank!(number = 1)
  @rank += number
end

#not_executed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fractify/operator.rb', line 48

def not_executed?
  !executed
end

#to_s ⇒ Object 



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# File 'lib/fractify/operator.rb', line 28

def to_s
  "(#{operator_character}, #{rank})"
end