Class: Maxima::Rational

Inherits:
Unit
  • Object
show all
Defined in:
lib/maxima/rational.rb

Constant Summary collapse

REGEX = 
/\s*(\d+)\s*\/\s*(\d+)\s*/

Instance Attribute Summary collapse

Attributes inherited from Unit

#maxima_output, #plot_title

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Unit

#==, #===, #at, #gnu_plot_options, #gnu_plot_text, #gnu_plot_w, #inspect, #negative?, parse_float, #positive?, #simplified, #through_maxima, #to_gnu_plot, #to_maxima_input, #to_pdf, #to_s, #with_plot_title, #zero?

Constructor Details

#initialize(numerator, denominator, **options) ⇒ Rational

Returns a new instance of Rational.



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# File 'lib/maxima/rational.rb', line 6

def initialize(numerator, denominator, **options)
  super(**options)
  @numerator = numerator
  @denominator = denominator
end

Instance Attribute Details

#denominator ⇒ Object

Returns the value of attribute denominator.



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# File 'lib/maxima/rational.rb', line 4

def denominator
  @denominator
end

#numerator ⇒ Object

Returns the value of attribute numerator.



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# File 'lib/maxima/rational.rb', line 4

def numerator
  @numerator
end

Class Method Details

.parse(maxima_output) ⇒ Object 



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# File 'lib/maxima/rational.rb', line 13

def self.parse(maxima_output)
  _, numerator, denominator = REGEX.match(maxima_output).to_a

  return if numerator.nil? || denominator.nil?

  if numerator == 0
    Float.new(0, maxima_output: maxima_output)
  else
    Rational.new(numerator.to_f, denominator.to_f, maxima_output: maxima_output)
  end
rescue StandardError
  nil
end

Instance Method Details

#<=>(other) ⇒ Object 



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# File 'lib/maxima/rational.rb', line 39

def <=>(other)
  case other
  when ::Float, ::Rational, Float, Rational
    self.to_f <=> other.to_f
  else
    -1
  end
end

#imaginary? ⇒ Boolean

Returns:



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# File 'lib/maxima/rational.rb', line 31

def imaginary?
  false
end

#real? ⇒ Boolean

Returns:



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# File 'lib/maxima/rational.rb', line 27

def real?
  true
end

#to_f ⇒ Object 



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# File 'lib/maxima/rational.rb', line 35

def to_f
  @to_f ||= numerator.fdiv(denominator)
end