Module: Kernel

Defined in:
lib/arithmetic.rb

Instance Method Summary collapse

Instance Method Details

#∏(values) ⇒ Object 



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# File 'lib/arithmetic.rb', line 13

def ∏(values)
  values.inject(:*)
end

#∏x(expression, variable, values) ⇒ Object 



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# File 'lib/arithmetic.rb', line 17

def ∏x(expression, variable, values)
   ∏ (values.map {|value| eval(expression.gsub(variable, value.to_s))})
end

#∑(values) ⇒ Object 



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# File 'lib/arithmetic.rb', line 5

def ∑(values)
  values.inject(&:+)
end

#∑x(expression, variable, values) ⇒ Object 



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# File 'lib/arithmetic.rb', line 21

def ∑x(expression, variable, values)
   ∑ (values.map {|value| eval(expression.gsub(variable, value.to_s))})
end

#√(root) ⇒ Object 



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# File 'lib/arithmetic.rb', line 9

def √(root)
   Math.sqrt(root)
end