module SplitBetween
Public Instance Methods
/(*_params)
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Override division – should not do it, but use split_between
# File lib/money_extensions/split_between.rb, line 7 def /(*_params) raise "Division of money NOT allowed - use 'split_between' to avoid rounding errors" end
split_between(params)
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Split the money between the specified number - and return an array of money Remainder in splits are given to the highest value e.g. $2.00 splits [40, 81, 40] into [49, 102, 49] $1.01 splits [ 1, 1, 1] into [35, 33, 33]
# File lib/money_extensions/split_between.rb, line 25 def split_between(params) # if just a number is passed in, then money is split equally if params.is_a?(Integer) results = split_evenly_between(params) # if an array of monies is passed in, then split in proportions elsif params.is_a?(Array) raise ArgumentError, 'Can only split up over at least one ration' if params.empty? && !zero? results = params.map { |p| p.is_a?(::Money) ? p.cents : p } total = results.inject(:+) if total.zero? return Array.new(results.size, ::Money.new(0)) if zero? raise ArgumentError, "Total of ratios should not be zero! You sent in: #{params.inspect}" end results.map! do |ratio| ::Money.new((cents * (ratio.to_f / total)).round) end # Distribute rounding to max absolute to avoid a $0 amount getting the rounding remainder = self - results.total_money if !remainder.zero? biggest_value_index = results.index(results.max_by(&:abs)) results[biggest_value_index] += remainder end else raise 'Either a Integer or array has to be passed in for splitting money' end results end
split_evenly_between(number)
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# File lib/money_extensions/split_between.rb, line 17 def split_evenly_between(number) Money.split_evenly_between(cents, number) end