Module: Kernel

Defined in:
lib/arithmetic.rb

Instance Method Summary collapse

Instance Method Details

#∏(values) ⇒ Object 



12
13
14
 
# File 'lib/arithmetic.rb', line 12

def ∏(values)
  values.inject(:*)
end

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



16
17
18
 
# File 'lib/arithmetic.rb', line 16

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

#∑(values) ⇒ Object 



4
5
6
 
# File 'lib/arithmetic.rb', line 4

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

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



20
21
22
 
# File 'lib/arithmetic.rb', line 20

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

#√(root) ⇒ Object 



8
9
10
 
# File 'lib/arithmetic.rb', line 8

def √(root)
   Math.sqrt(root)
end