[#28015] RCR: RUBY_VERSION_INT — Roger Pack <rogerdpack2@...>

Situation:

14 messages 2010/02/02

[#28113] [Bug #2723] $: length affects re-require time of already loaded files — Greg Hazel <redmine@...>

Bug #2723: $: length affects re-require time of already loaded files

16 messages 2010/02/08

[#28151] [Bug #2739] ruby 1.8.7 built with pthreads hangs under some circumstances — Joel Ebel <redmine@...>

Bug #2739: ruby 1.8.7 built with pthreads hangs under some circumstances

31 messages 2010/02/11

[#28188] [Bug #2750] build fails on win32/MinGW: "executable host ruby is required." even when --with-baseruby is used — Christian Bodt <redmine@...>

Bug #2750: build fails on win32/MinGW: "executable host ruby is required." even when --with-baseruby is used

9 messages 2010/02/16

[#28206] Is Math module a wrapper of libm? — Yusuke ENDOH <mame@...>

Hi matz --

23 messages 2010/02/18
[#28212] Re: Is Math module a wrapper of libm? — Yukihiro Matsumoto <matz@...> 2010/02/18

Hi,

[#28219] Re: Is Math module a wrapper of libm? — Yusuke ENDOH <mame@...> 2010/02/18

Hi,

[#28225] Re: Is Math module a wrapper of libm? — Marc-Andre Lafortune <ruby-core-mailing-list@...> 2010/02/18

Hi,

[#28233] Re: Is Math module a wrapper of libm? — Kenta Murata <muraken@...> 2010/02/18

Hi,

[#28265] Re: Is Math module a wrapper of libm? — Marc-Andre Lafortune <ruby-core-mailing-list@...> 2010/02/20

Hi,

[#28286] Re: Is Math module a wrapper of libm? — Kenta Murata <muraken@...> 2010/02/21

Hi

[#28291] Re: Is Math module a wrapper of libm? — Marc-Andre Lafortune <ruby-core-mailing-list@...> 2010/02/22

Hi!

[#28235] [Feature #2759] Regexp /g and /G options — Michael Fellinger <redmine@...>

Feature #2759: Regexp /g and /G options

35 messages 2010/02/18

[#28329] [ANN] Ruby 1.9.2dev has passed RubySpec! — Yusuke ENDOH <mame@...>

Hi,

12 messages 2010/02/24

[#28355] [ANN] Toward rich diversity of Ruby development. — Urabe Shyouhei <shyouhei@...>

A short announcement: thanks to some helps of GitHub people, I now have

12 messages 2010/02/27

[#28365] Indentifying key MRI-on-Windows issues — Jon <jon.forums@...>

In an effort to begin summarizing key MRI-on-Windows open issues I'm starting this thread in hopes that those interested will respond with details on the key MRI issues they feel need resolution for Windows users.

11 messages 2010/02/27
[#28690] Re: Indentifying key MRI-on-Windows issues — Roger Pack <rogerdpack2@...> 2010/03/16

> My key concern is http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-=

[ruby-core:28274] Re: [Feature #2772] Matrix: Calculating determinant using Bareiss algorithm [patch]

From: Yu Ichino <noagony@...>
Date: 2010-02-21 02:08:19 UTC
List: ruby-core #28274
Dear Marc and everyone,

It is great relief to see my request had a kind response.
My gratitude goes to pains you took, Marc!
Thank you for peering through the algorithm and revising it up to the
library level.

After my initial post,
I came to conclude that the slower performance in the Float case
is due to additional multiplication a[k][k]*a[i][j]
and is unavoidable.
Am I correct?

If so,
you better keep the original algorithm for Float matrix
(still I don't get the reason of many swap operations)
and use Bareiss only for Integer one.
It depends on the library policy of which I am completely ignorant.
(Matrix#determinant might be the only interface users want to see)

See you,
Yu

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