Contents

class Integer
  def hexagonal?
    return true if zero?
    n = ((Math.sqrt((8*self) + 1) + 1)/4)
    n == n.to_i
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
numb-0.21.0	lib/numb/hexagonal.rb
numb-0.20.0	lib/numb/hexagonal.rb