gistfile1.rb

require 'bio'

class Bio::Sequence::NA
  def self.compute_melting_temperature(nastr)
    10 # code here ...
  end

  def melting_temperature
    if @melting_temperature
      @melting_temperature
    else
      @melting_temperature = self.class.compute_melting_temperature(self)
    end
  end
end


if __FILE__ == $0
  # as a class method (static method ?)
  p Bio::Sequence::NA.compute_melting_temperature("ACGT")
  
  # as an instance method
  na = Bio::Sequence::NA.new("ACGT")
  p na.melting_temperature
end