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Turn numbers into strings with thousands' separators (See related posts)

Turn numbers into strings with thousands' separators (from zenspider)

class Numeric
  def commify(dec='.', sep=',')
    num = to_s.sub(/\./, dec)
    dec = Regexp.escape dec
    num.reverse.gsub(/(\d\d\d)(?=\d)(?!\d*#{dec})/, "\\1#{sep}").reverse
  end
end


So, you get:

1233232423424.23423.commify # => "1,233,232,423,424.23"
to ruby zenspider by nicwilliams on Thu Apr 12 05:14:54 -0400 2007

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