Class: Musa::Darwin::Darwin
- Inherits:
-
Object
- Object
- Musa::Darwin::Darwin
- Defined in:
- lib/musa-dsl/generative/darwin.rb
Defined Under Namespace
Classes: MainContext, Measure, MeasuresEvalContext
Instance Method Summary collapse
- #evaluate_weights(measure_a, measure_b) ⇒ Object
-
#initialize(&block) ⇒ Darwin
constructor
A new instance of Darwin.
- #select(population) ⇒ Object
Constructor Details
#initialize(&block) ⇒ Darwin
Returns a new instance of Darwin.
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# File 'lib/musa-dsl/generative/darwin.rb', line 6 def initialize(&block) raise ArgumentError, 'block is needed' unless block main_context = MainContext.new &block @measures = main_context._measures @weights = main_context._weights end |
Instance Method Details
#evaluate_weights(measure_a, measure_b) ⇒ Object
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# File 'lib/musa-dsl/generative/darwin.rb', line 60 def evaluate_weights(measure_a, measure_b) measure_b.evaluate_weight(@weights) <=> measure_a.evaluate_weight(@weights) end |
#select(population) ⇒ Object
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# File 'lib/musa-dsl/generative/darwin.rb', line 15 def select(population) measured_objects = [] population.each do |object| context = MeasuresEvalContext.new context.with object, **{}, &@measures measure = context._measure measured_objects << { object: object, measure: context._measure } unless measure.died? end limits = {} measured_objects.each do |measured_object| measure = measured_object[:measure] measure.dimensions.each do |measure_name, value| limit = limits[measure_name] ||= { min: nil, max: nil } limit[:min] = value.to_f if limit[:min].nil? || limit[:min] > value limit[:max] = value.to_f if limit[:max].nil? || limit[:max] < value limit[:range] = limit[:max] - limit[:min] end end # warn "Darwin.select: weights #{@weights}" measured_objects.each do |measured_object| measure = measured_object[:measure] measure.dimensions.each do |dimension_name, value| limit = limits[dimension_name] measure.normalized_dimensions[dimension_name] = (value - limit[:min]) / limit[:range] end # warn "Darwin.select: #{measured_object[:object]} #{measured_object[:measure]} weight=#{measured_object[:measure].evaluate_weight(@weights).round(2)}" end measured_objects.sort! { |a, b| evaluate_weights a[:measure], b[:measure] } measured_objects.collect { |measured_object| measured_object[:object] } end |