Contents

# frozen_string_literal: true

module Split
  module Algorithms
    module WeightedSample
      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
    end
  end
end

Version data entries

6 entries across 6 versions & 1 rubygems

Version	Path
split-4.0.4	lib/split/algorithms/weighted_sample.rb
split-4.0.3	lib/split/algorithms/weighted_sample.rb
split-4.0.2	lib/split/algorithms/weighted_sample.rb
split-4.0.1	lib/split/algorithms/weighted_sample.rb
split-4.0.0.pre2	lib/split/algorithms/weighted_sample.rb
split-4.0.0.pre	lib/split/algorithms/weighted_sample.rb