[#6143] — Christophe Poucet <christophe.poucet@...>

Hello,

17 messages 2005/10/04
[#6147] Re: patch.tgz — nobu.nokada@... 2005/10/04

Hi,

[#6199] Kernel rdoc HTML file not being created when rdoc is run on 1.8.3 — James Britt <ruby@...>

When 1.8.3 came out, I grabbed the source and ran rdoc on it. After

9 messages 2005/10/08

[#6251] RubyGems, upstream releases and idempotence of packaging — Mauricio Fern疣dez <mfp@...>

[sorry for the very late reply; I left this message in +postponed and forgot

14 messages 2005/10/12

[#6282] Wilderness: Need Code to invoke ELTS_SHARED response — "Charles E. Thornton" <ruby-core@...>

Testing the My Object Dump and I am trying to cause creation

13 messages 2005/10/14
[#6283] Re: Wilderness: Need Code to invoke ELTS_SHARED response — Mauricio Fern疣dez <mfp@...> 2005/10/14

On Fri, Oct 14, 2005 at 05:04:59PM +0900, Charles E. Thornton wrote:

[#6288] Re: Wilderness: Need Code to invoke ELTS_SHARED response — "Charles E. Thornton" <ruby-core@...> 2005/10/14

Mauricio Fern疣dez wrote:

[#6365] Time for built-in Rational and Complex classes? — Gavin Sinclair <gsinclair@...>

There has been some support for, but no comment on, RCR #260 ("Make

12 messages 2005/10/24
[#6366] Re: Time for built-in Rational and Complex classes? — "Ara.T.Howard" <Ara.T.Howard@...> 2005/10/24

On Mon, 24 Oct 2005, Gavin Sinclair wrote:

[#6405] Re: [PATCH] Pathname.exists?() — "Berger, Daniel" <Daniel.Berger@...>

12 messages 2005/10/25
[#6406] Re: [PATCH] Pathname.exists?() — TRANS <transfire@...> 2005/10/25

On 10/25/05, Berger, Daniel <Daniel.Berger@qwest.com> wrote:

[#6408] Re: [PATCH] Pathname.exists?() — Gavin Sinclair <gsinclair@...> 2005/10/25

On 10/26/05, TRANS <transfire@gmail.com> wrote:

[#6442] Wilderness: I Have formatted README.EXT into an HTML Document — "Charles E. Thornton" <ruby-core@...>

I have taken README.EXT (English Version Only) and have reformatted

14 messages 2005/10/27

[#6469] csv.rb a start on refactoring. — Hugh Sasse <hgs@...>

For a database application I found using CSV to be rather slow.

50 messages 2005/10/28
[#6470] Re: csv.rb a start on refactoring. — "Ara.T.Howard" <Ara.T.Howard@...> 2005/10/28

[#6471] Re: csv.rb a start on refactoring. — James Edward Gray II <james@...> 2005/10/28

On Oct 28, 2005, at 8:53 AM, Ara.T.Howard wrote:

[#6474] Re: csv.rb a start on refactoring. — "Ara.T.Howard" <Ara.T.Howard@...> 2005/10/28

On Fri, 28 Oct 2005, James Edward Gray II wrote:

[#6484] Re: csv.rb a start on refactoring. — James Edward Gray II <james@...> 2005/10/29

On Oct 28, 2005, at 9:58 AM, Ara.T.Howard wrote:

[#6485] Re: csv.rb a start on refactoring. — "Ara.T.Howard" <Ara.T.Howard@...> 2005/10/29

On Sat, 29 Oct 2005, James Edward Gray II wrote:

[#6486] Re: csv.rb a start on refactoring. — James Edward Gray II <james@...> 2005/10/29

On Oct 28, 2005, at 8:25 PM, Ara.T.Howard wrote:

[#6487] Re: csv.rb a start on refactoring. — "Ara.T.Howard" <Ara.T.Howard@...> 2005/10/29

On Sat, 29 Oct 2005, James Edward Gray II wrote:

[#6491] Re: csv.rb a start on refactoring. — James Edward Gray II <james@...> 2005/10/29

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

[#6493] Re: csv.rb a start on refactoring. — James Edward Gray II <james@...> 2005/10/29

On Oct 28, 2005, at 10:06 PM, James Edward Gray II wrote:

[#6496] Re: csv.rb a start on refactoring. — "Ara.T.Howard" <Ara.T.Howard@...> 2005/10/29

On Sun, 30 Oct 2005, James Edward Gray II wrote:

[#6502] Re: csv.rb a start on refactoring. — James Edward Gray II <james@...> 2005/10/30

On Oct 29, 2005, at 12:11 PM, Ara.T.Howard wrote:

[#6505] Re: csv.rb a start on refactoring. — "Ara.T.Howard" <Ara.T.Howard@...> 2005/10/30

On Mon, 31 Oct 2005, James Edward Gray II wrote:

[#6511] Planning FasterCSV (was Re: csv.rb a start on refactoring.) — James Edward Gray II <james@...> 2005/10/30

I've decided to create a FasterCSV library, based on the code we

[#6516] Re: Planning FasterCSV (was Re: csv.rb a start on refactoring.) — "Ara.T.Howard" <Ara.T.Howard@...> 2005/10/31

On Mon, 31 Oct 2005, James Edward Gray II wrote:

[#6518] Re: Planning FasterCSV (was Re: csv.rb a start on refactoring.) — "NAKAMURA, Hiroshi" <nakahiro@...> 2005/10/31

-----BEGIN PGP SIGNED MESSAGE-----

Re: csv.rb a start on refactoring.

From: James Edward Gray II <james@...>
Date: 2005-10-29 00:24:27 UTC
List: ruby-core #6484
On Oct 28, 2005, at 9:58 AM, Ara.T.Howard wrote:

> do you have a better reference for the re?  or is that the one?

This is a pretty good size section of the book that goes into much  
detail.  I'm going to try and show the simplest solution he claims  
fully functional here and I've trimmed even that.  Just understand  
that this isn't his complete solution.  I'll use whitespace and  
comments liberally in the hopes of making it easier to follow:

(?: ^|, )  # fields must be at the beginning of the string, or after  
a comma
(?:        # now match either...
         "  # a double-quoted field...
                 (?: [^"] | "" )*
         "
|          # or some non-quote/non-comma text...
         [^",]*
)

He goes on to dramatically optimize that, which leads me to a few  
questions:

1.  Does Ruby support \G?
2.  What about atomic grouping like Perl's (?> ... )?

Obviously, this gets more complicated or possibly even falls apart if  
you start changing the delimiters, which I believe the library does  
allow.  Still, maybe we could default use this in the common case...   
If it even turns out to be faster.

I hope that answers your questions.

James Edward Gray II


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