Module: Apportion

Defined in:
lib/apportion.rb,
lib/apportion/util.rb,
lib/apportion/setup.rb,
lib/apportion/version.rb,
lib/apportion/algorithm/equal_proportions.rb

Overview

Top level interface, or API, to distribute a quantity among recipients

Defined Under Namespace

Modules: Algorithm, Setup, Util

Constant Summary collapse

VERSION = 
'0.0.2'

Class Method Summary collapse

Class Method Details

.division(weights, size, options = {}) ⇒ Hash

Distributes a quantity among recipients by dividing proportionally according to relative weights using the ‘equal proportions’ algorithm

Examples:

division({a: 41, b: 32, c: 27}, 7)
# => {a: 3, b: 2, c: 2}

Parameters:

  • weights (Hash) —

    relative integer proportions

  • size (Integer) —

    quantity to apportion

  • options (Hash) (defaults to: {})

Options Hash (options):

  • :prior_portions (Hash) —

    from a previous apportionment

  • :required_minimum (Integer) —

    smallest portion for each recipient

Returns:

  • (Hash) —

    portions



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# File 'lib/apportion.rb', line 22

def division(weights, size, options = {})
  portions = Setup.initial_portions(weights.keys, options)
  sum_portions = Util.hash_values_sum(portions)
  Setup.validate(size, sum_portions)
  next_step(weights, portions, sum_portions, size)
end