do stuff some times

# This class takes a job, and maybe does it.
# Usage `Slacker.maybe(probability: 0.1) { something() }
class Slacker
  # Probability should be a float between 0 and 1.
  def self.maybe(probability:)
    raise "Slacker needs a job to skip out on." unless block_given?
    yield if rand() < probability
  end

  def self.often(&block)
    maybe(probability: 0.5) { block.call }
  end

  def self.rarely(&block)
    maybe(probability: 0.01) { block.call }
  end

  def self.one_in(i, &block)
    maybe(probability: 1.0 / i.to_f) { block.call }
  end
end