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Value objects for length, area, volume and weight.
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ScalarTypes =========== This plugin provides value objects for modelling attributes such as length, area, volume and weight. Useful when used with ActiveRecord::Aggregations, e.g: composed_of :weight, :mapping => [ %w(weight_amount amount), %w(weight_units units)] Where possible when value objects are multiplied together the appropriate object is returned, e.g. length * length = area Copyright (c) 2008 Andrew White, released under the MIT license