Class: EenieMeenie::Sorters::LateCoercion

Inherits:
Base
  • Object
show all
Defined in:
lib/eenie_meenie/sorters/late_coercion.rb

Instance Method Summary collapse

Methods inherited from Base

#load_option, #load_options

Constructor Details

#initialize(*args, options) ⇒ LateCoercion

Returns a new instance of LateCoercion.



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# File 'lib/eenie_meenie/sorters/late_coercion.rb', line 4

def initialize(*args, options)
  load_options(:groups, :population, options)
end

Instance Method Details

#assign ⇒ Object 



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# File 'lib/eenie_meenie/sorters/late_coercion.rb', line 18

def assign
  coercion_threshold_reached? ? assign_with_coercion : assign_without_coercion
end

#assign_with_coercion ⇒ Object 



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# File 'lib/eenie_meenie/sorters/late_coercion.rb', line 35

def assign_with_coercion
  group = @groups.sample
  group_tally = count_for_group(group)
  other_group = (@groups - [group]).first
  group = other_group if group_tally > count_for_group(other_group) + rand(leeway)

  group
end

#assign_without_coercion ⇒ Object 



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# File 'lib/eenie_meenie/sorters/late_coercion.rb', line 22

def assign_without_coercion
  selected_group = @groups.sample
  if rand(@population) >= (@population / 2)
    group = selected_group
  else
    group = the_other_group(selected_group)
  end
end

#coercion_threshold_reached? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/eenie_meenie/sorters/late_coercion.rb', line 56

def coercion_threshold_reached?
  (current_population / @population) >= 0.9
end

#count_for_group(group) ⇒ Object 



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# File 'lib/eenie_meenie/sorters/late_coercion.rb', line 44

def count_for_group(group)
  @results[group].to_f
end

#current_population ⇒ Object 



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# File 'lib/eenie_meenie/sorters/late_coercion.rb', line 52

def current_population
  @results.values.inject(&:+).to_f
end

#leeway ⇒ Object 



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# File 'lib/eenie_meenie/sorters/late_coercion.rb', line 48

def leeway
  ((current_population / 2 ) * 0.01).round
end

#sort ⇒ Object 



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# File 'lib/eenie_meenie/sorters/late_coercion.rb', line 8

def sort
  @results = {}
  @groups.each { |group| @results.merge!(group => 0) }

  @population.times do |i|
    @results[assign] += 1
  end
  groups = @results
end

#the_other_group(group) ⇒ Object 



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# File 'lib/eenie_meenie/sorters/late_coercion.rb', line 31

def the_other_group group
  (@groups - [group]).first
end