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Dr Nic Williams http://drnicwilliams.com

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Turn numbers into strings with thousands' separators

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 Apr 12, 2007
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