From: James Edward Gray II <james@...>
Date: 2005-10-29T12:06:51+09:00
Subject: Re: csv.rb a start on refactoring.

On Oct 28, 2005, at 8:43 PM, Ara.T.Howard wrote:

>>> can you post the optimized re?
>>>
>>
>> Yes.  I have to run out right now, but I will post it at some  
>> point this weekend...
>>
>
> great.

Here's the hyper-optimized version with an example of how he uses it  
(translated from Perl to Ruby by me):

 >> data = %Q{Ten Thousand,10000, 2710 ,,"10,000","It's ""10 Grand"",  
baby",10K}
=> "Ten Thousand,10000, 2710 ,,\"10,000\",\"It's \"\"10 Grand\"\",  
baby\",10K"
 >> results = Array.new
=> []
 >> data.scan(/\G(?:^|,)(?:"((?>[^"]*)(?>""[^"]*)*)"|([^",]*))/) do
?>   if $1.nil?
 >>     results << $2
 >>   else
?>     results << $1.gsub(%Q{""}, %Q{"})
 >>   end
 >> end
=> "Ten Thousand,10000, 2710 ,,\"10,000\",\"It's \"\"10 Grand\"\",  
baby\",10K"
 >> results
=> ["Ten Thousand", "10000", " 2710 ", "", "10,000", "Ten Thousand",  
"10000", " 2710 ", "", "10,000", "It's \"10 Grand\", baby", "10K"]

James Edward Gray II