Contents

class Allocate
  attr_accessor :amount
  attr_accessor :ratios

  def initialize(amount = 0 , ratios = [])
    @amount = amount
    @ratios = ratios
  end

  def divided
    divided_ratios = @ratios.map { |ratio| ratio.to_d/ratios.sum_me.to_d }
    rates = divided_ratios.map { |ratio| ((@amount * ratio).round(2)) }
    compensate_last_slice(rates)
  end

  def compensate_last_slice(rates)
    rates.tap do |rates|
      max_rate = rates.max.abs
      rates[-1] = (rates[-1] + (amount - rates.sum_me)).round(2)
      if  rates[-1].abs > (2 * max_rate.abs )
        raise "Number is too small to be allocated on that number of slices(#@amount on #{@ratios.size} slices)."
      end
    end
  end

  def self.evenly(amount, number_of_slices)
    Allocate.new.tap do |a|
      a.amount = amount
      a.ratios = (1..number_of_slices).map { 1.to_d/number_of_slices }
    end.divided
  end
end #Allocate

Version data entries

7 entries across 7 versions & 1 rubygems

Version	Path
guerrilla_patch-3.0.3	lib/guerrilla_patch/allocate.rb
guerrilla_patch-3.0.2	lib/guerrilla_patch/allocate.rb
guerrilla_patch-2.8.7	lib/guerrilla_patch/allocate.rb
guerrilla_patch-2.8.6	lib/guerrilla_patch/allocate.rb
guerrilla_patch-2.8.5	lib/guerrilla_patch/allocate.rb
guerrilla_patch-2.8.4	lib/guerrilla_patch/allocate.rb
guerrilla_patch-2.8.3	lib/guerrilla_patch/allocate.rb