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module Runby # Represents a distance (distance UOM and multiplier) class Distance attr_reader :uom, :multiplier def initialize(uom = :km, multiplier = 1) case uom when Distance return init_from_clone uom when DistanceUnit return init_from_distance_unit uom, multiplier when String return init_from_string uom when Symbol return init_from_symbol uom, multiplier else raise 'Invalid distance unit of measure' end end def meters kilometers = @multiplier * @uom.conversion_factor kilometers * 1000.0 end def self.parse(str) str = str.strip.chomp.downcase multiplier = str.scan(/[\d,.]+/).first.to_f uom = str.scan(/[-_a-z ]+$/).first raise "Unable to find distance unit in '#{str}'" if uom.nil? parsed_uom = Runby::DistanceUnit.parse uom raise "'#{uom.strip}' is not recognized as a distance unit" if parsed_uom.nil? self.new parsed_uom, multiplier end def to_s "#{format('%g', @multiplier.round(2))} #{pluralized_uom}" end def pluralized_uom uom_description = @uom.description.downcase if @multiplier > 1 then uom_description += 's' end uom_description end private def init_from_clone(distance) @uom = distance.uom @multiplier = distance.multiplier end def init_from_distance_unit(uom, multiplier) @uom = uom @multiplier = multiplier end def init_from_string(string) init_from_clone Distance.parse string end def init_from_symbol(distance_uom_symbol, multiplier) raise "Unknown unit of measure #{distance_uom_symbol}" unless Runby::DistanceUnit.known_uom? distance_uom_symbol raise 'Invalid multiplier' unless multiplier.is_a?(Numeric) @uom = DistanceUnit.new distance_uom_symbol @multiplier = multiplier * 1.0 end end end
Version data entries
2 entries across 2 versions & 1 rubygems
Version | Path |
---|---|
runby_pace-0.6.88 | lib/runby_pace/distance.rb |
runby_pace-0.6.87 | lib/runby_pace/distance.rb |