[#7500] Re: how to introduce reference objects into ruby — "Geert Fannes" <Geert.Fannes@...>

The problem with the code you sent is that you have to go through ALL

16 messages 2006/03/10

[#7553] "not" operator used in expression that is a method parameter can generate syntax error — noreply@...

Bugs item #3843, was opened at 2006-03-15 22:09

27 messages 2006/03/16
[#7554] Re: [ ruby-Bugs-3843 ] "not" operator used in expression that is a method parameter can generate syntax error — nobu@... 2006/03/16

Hi,

[#7557] Re: [ ruby-Bugs-3843 ] "not" operator used in expression that is a method parameter can generate syntax error — 卜部昌平 <shyouhei@...> 2006/03/16

Nobu, you are not answering to the question.... You have to unveil why

[#7559] Re: [ ruby-Bugs-3843 ] "not" operator used in expression that is a method parameter can generate syntax error — Yukihiro Matsumoto <matz@...> 2006/03/16

Hi,

[#7560] Rant about keyword logical operators was : (Re: [ ruby-Bugs-3843 ] "not" operator used in expression that is a method parameter can generate syntax error) — "Zev Blut" <rubyzbibd@...> 2006/03/16

Hello,

[#7565] Re: [ ruby-Bugs-3843 ] "not" operator used in expression that is a method parameter can generate syntax error — mathew <meta@...> 2006/03/16

Yukihiro Matsumoto wrote:

[#7566] Re: [ ruby-Bugs-3843 ] "not" operator used in expression that is a method parameter can generate syntax error — "Brian Mitchell" <binary42@...> 2006/03/16

On 3/16/06, mathew <meta@pobox.com> wrote:

[#7567] Re: [ ruby-Bugs-3843 ] "not" operator used in expression that is a method parameter can generate syntax error — mathew <meta@...> 2006/03/16

Brian Mitchell wrote:

[#7568] Re: [ ruby-Bugs-3843 ] "not" operator used in expression that is a method parameter can generate syntax error — "Brian Mitchell" <binary42@...> 2006/03/16

On 3/16/06, mathew <meta@pobox.com> wrote:

[#7614] PATCH: A subclassable Pathname — "Evan Phoenix" <evanwebb@...>

A simply change (changing all references of "Pathname.new" to

19 messages 2006/03/27
[#7618] Re: PATCH: A subclassable Pathname — Tanaka Akira <akr@...17n.org> 2006/03/27

In article <92f5f81d0603262350k796fe48fp2224b9f2108ac507@mail.gmail.com>,

[#7619] Re: PATCH: A subclassable Pathname — "Evan Phoenix" <evan@...> 2006/03/27

Quite right on the .glob and .getwd. I guess the tests don't test hit

[#7620] Re: PATCH: A subclassable Pathname — Tanaka Akira <akr@...17n.org> 2006/03/27

In article <92f5f81d0603270903g2fb02244i6a395be708dfffa3@mail.gmail.com>,

Re: how to introduce reference objects into ruby

From: Jim Weirich <jim@...>
Date: 2006-03-10 21:02:50 UTC
List: ruby-core #7507
Jim Weirich wrote:
 > What does your C/C++ program do to get around this difficulty?

Geert Fannes wrote:
> The columns store the actual values (doubles), and the rows store 
 > pointers to the corresponding doubles. This way, I can update a
 > double directly via the columns, via the rows after dereferencing
 > the pointers.
> 
> (The real truth is a bit more complex since pointers on a 64 bit 
 > machine take 64 bit, which wastes too much memory space. I
 > store float and unsigned int indices instead of pointers, but
 > the principle is the same)

I think you are saying that the rows of your matrix contain the value, 
and the columns contain references (either pointers or indices) to the 
row values.  Is that correct (modulo having rows/columns reversed)?

I'm still unclear why this solution wouldn't work in Ruby.

-- 
-- Jim Weirich       jweirich@one.net      http://onestepback.org
-----------------------------------------------------------------
"Beware of bugs in the above code; I have only proved it correct,
not tried it." -- Donald Knuth (in a memo to Peter van Emde Boas)

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