Module: Split::Algorithms::WeightedSample

Defined in:
lib/split/algorithms/weighted_sample.rb

Class Method Summary collapse

Class Method Details

.choose_alternative(experiment) ⇒ Object 



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# File 'lib/split/algorithms/weighted_sample.rb', line 5

def self.choose_alternative(experiment)
  weights = experiment.alternatives.map(&:weight)

  total = weights.inject(:+)
  point = rand * total

  experiment.alternatives.zip(weights).each do |n,w|
    return n if w >= point
    point -= w
  end
end