Class: Rational
- Inherits:
-
Object
- Object
- Rational
- Defined in:
- lib/rubysl/mathn/mathn.rb
Constant Summary collapse
- Unify =
true
Instance Method Summary collapse
Instance Method Details
#**(other) ⇒ Object
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# File 'lib/rubysl/mathn/mathn.rb', line 131 def ** (other) if other.kind_of?(Rational) other2 = other if self < 0 return Complex.new!(self, 0) ** other elsif other == 0 return Rational(1,1) elsif self == 0 return Rational(0,1) elsif self == 1 return Rational(1,1) end npd = numerator.prime_division dpd = denominator.prime_division if other < 0 other = -other npd, dpd = dpd, npd end for elm in npd elm[1] = elm[1] * other if !elm[1].kind_of?(Integer) and elm[1].denominator != 1 return Float(self) ** other2 end elm[1] = elm[1].to_i end for elm in dpd elm[1] = elm[1] * other if !elm[1].kind_of?(Integer) and elm[1].denominator != 1 return Float(self) ** other2 end elm[1] = elm[1].to_i end num = Integer.from_prime_division(npd) den = Integer.from_prime_division(dpd) Rational(num,den) elsif other.kind_of?(Integer) if other > 0 num = numerator ** other den = denominator ** other elsif other < 0 num = denominator ** -other den = numerator ** -other elsif other == 0 num = 1 den = 1 end Rational.new!(num, den) elsif other.kind_of?(Float) Float(self) ** other else x , y = other.coerce(self) x ** y end end |
#inspect ⇒ Object
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# File 'lib/rubysl/mathn/mathn.rb', line 125 def inspect format "%s/%s", numerator.inspect, denominator.inspect end |
#power! ⇒ Object
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# File 'lib/rubysl/mathn/mathn.rb', line 129 alias power! ** |
#power2(other) ⇒ Object
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# File 'lib/rubysl/mathn/mathn.rb', line 192 def power2(other) if other.kind_of?(Rational) if self < 0 return Complex(self, 0) ** other elsif other == 0 return Rational(1,1) elsif self == 0 return Rational(0,1) elsif self == 1 return Rational(1,1) end dem = nil x = self.denominator.to_f.to_i neard = self.denominator.to_f ** (1.0/other.denominator.to_f) loop do if (neard**other.denominator == self.denominator) dem = neaed break end end nearn = self.numerator.to_f ** (1.0/other.denominator.to_f) Rational(num,den) elsif other.kind_of?(Integer) if other > 0 num = numerator ** other den = denominator ** other elsif other < 0 num = denominator ** -other den = numerator ** -other elsif other == 0 num = 1 den = 1 end Rational.new!(num, den) elsif other.kind_of?(Float) Float(self) ** other else x , y = other.coerce(self) x ** y end end |