Contents

require 'darkext/array'

class Integer
  # Computes the factorial of the Integer
  def fact
    raise ArgumentError.new('Cannot compute factorial of negative number') if 0 > self
    return 1 if self.zero?
    return (1..self).to_a.product
  end
end

Version data entries

5 entries across 5 versions & 2 rubygems

Version	Path
darkhelmet-darkext-0.11.0	lib/darkext/integer.rb
darkhelmet-darkext-0.11.1	lib/darkext/integer.rb
darkhelmet-darkext-0.11.2	lib/darkext/integer.rb
darkhelmet-darkext-0.12.0	lib/darkext/integer.rb
darkext-0.12.0	lib/darkext/integer.rb