the metrics of numbers

gistfile1.rb

module Metric
    PREFIXES = {
        :yotta =>  8,
        :zetta =>  7,
        :exa   =>  6,
        :peta  =>  5,
        :tera  =>  4,
        :giga  =>  3,
        :mega  =>  2,
        :kilo  =>  1,
        :hecto =>  2/3,
        :deca  =>  1/3,

        :deci  => -1/3,
        :centi => -2/3,
        :milli => -1,
        :micro => -2,
        :nano  => -3,
        :pico  => -4,
        :femto => -5,
        :atto  => -6,
        :zepto => -7,
        :yocto => -8,
    }

    PREFIXES.each do |key, exponent|
        define_method(key) { self * 1_000**exponent  }
    end
end

module Bytes
    PREFIXES = {
        :yotta => [:Y, 8],
        :zetta => [:Z, 7],
        :exa   => [:E, 6],
        :peta  => [:P, 5],
        :tera  => [:T, 4],
        :giga  => [:G, 3],
        :mega  => [:M, 2],
        :kilo  => [:K, 1],
    }

    PREFIXES.each do |key, (symbol, exponent)|
        define_method(:"#{key}bits") { self * 1024**exponent }

        alias_method :"#{symbol}b", :"#{key}bits"

        alias_method :"#{key}bytes", :"#{key}bits"
        alias_method :"#{symbol}B", :"#{key}bytes"
    end

    def bits
        self * 8
    end
end

class Fixnum
    include Metric
    include Bytes
end