[#41581] Ruby 1.6.7 dieing of segfault — Dossy <dossy@...>

I've got something that's fairly reproducible in 1.6.7. Is

11 messages 2002/06/02
[#41582] Re: Ruby 1.6.7 dieing of segfault — Nobuyoshi Nakada <nobu.nokada@...> 2002/06/02

Hi,

[#41660] dynamic attr_accessor?? — Markus Jais <mjais@...>

hello

16 messages 2002/06/03

[#41755] HTML Parser suggestions wanted — Ned Konz <ned@...>

I've written an HTML parser that builds trees from HTML source. After

13 messages 2002/06/04

[#41809] eval and local variable — "Park Heesob" <phasis@...>

15 messages 2002/06/05

[#41819] mod_ruby and module space — "Sean O'Dell" <sean@...>

It seems that if I execute a script using mod_ruby, I cannot call

18 messages 2002/06/05

[#41867] Pascal-like 'with' statement? — Philip Mak <pmak@...>

Is there something like Pascal's with statement? I'd like to turn this

18 messages 2002/06/06

[#41919] 1-second events — Paul Brannan <pbrannan@...>

I need to create an event that occurs exactly once per second.

15 messages 2002/06/06

[#42086] ANN: REXML 2.3.5 && 2.2.3 — Sean Russell <ser@...>

<posted & mailed>

31 messages 2002/06/09
[#42091] Re: ANN: REXML 2.3.5 && 2.2.3 — Sean Russell <ser@...> 2002/06/09

<posted & mailed>

[#42092] RE: ANN: REXML 2.3.5 && 2.2.3 — <james@...> 2002/06/09

> Well, XMLSchema may be troublesome to interpret, but it isn't

[#42192] ruby-dev summary 17252-17356 — Minero Aoki <aamine@...>

Hi all,

81 messages 2002/06/11
[#42290] Re: a new block parameter/variable notation (Re: ruby-dev summary 17252-17356) — Kent Dahl <kentda@...> 2002/06/12

Not wanting to flog a dead horse, but I just wonder what the final word

[#42295] Re: a new block parameter/variable notation (Re: ruby-dev summary 17252-17356) — matz@... (Yukihiro Matsumoto) 2002/06/12

Hi,

[#42455] Application server & web developement enviroment — "Radu M. Obad磚 <whizkid@...>

Howdy,

14 messages 2002/06/14
[#42459] Re: Application server & web developement enviroment — Austin Ziegler <austin@...> 2002/06/14

On Fri, 14 Jun 2002 15:55:31 +0900, Radu M. Obadwrote:

[#42472] ANN: Programmierung in Ruby — "Juergen Katins" <katins.juergen@...>

Programmierung in Ruby Online gibt es jetzt mit ausfrlichem

14 messages 2002/06/14

[#42504] Are Unix tools just slow? — Chris Gehlker <gehlker@...>

Awhile back I was asking for help with a unixy way to search the mounted

48 messages 2002/06/14
[#42506] Re: Are Unix tools just slow? — Rick Bradley <rick@...> 2002/06/14

* Chris Gehlker (gehlker@fastq.com) [020614 17:18]:

[#42512] Re: Are Unix tools just slow? — Chris Gehlker <gehlker@...> 2002/06/15

On 6/14/02 3:34 PM, "Rick Bradley" <rick@rickbradley.com> wrote:

[#42513] opengl for ruby, please help — ccos <ccos@...> 2002/06/15

unix newby failing miserably here:

[#42516] Re: Are Unix tools just slow? — "Daniel P. Zepeda" <daniel@...> 2002/06/15

On Sat, 15 Jun 2002 07:14:38 +0900

[#42507] mpg123 — Tobias Reif <tobiasreif@...>

Hi,

15 messages 2002/06/14

[#42546] File.new('foo', 0600 , 'wb') — Tobias Reif <tobiasreif@...>

Hi,

21 messages 2002/06/15
[#42552] Re: File.new('foo', 0600 , 'wb') — Tobias Reif <tobiasreif@...> 2002/06/15

Dossy wrote:

[#42591] Kernel#select questions — Wilkes Joiner <boognish23@...>

I'm trying to track down a bug where Kernel#select is returning [[],[],[]] as

12 messages 2002/06/17

[#42617] eRuby on Mac OS X — Jim Menard <jimm@...>

I've searched ruby-talk for this topic, and the only messages I found show

13 messages 2002/06/17

[#42674] REXML in C — "Radu M. Obad磚 <whizkid@...>

Hi,

20 messages 2002/06/18

[#42771] Why is I/O slow? — Clifford Heath <cjh_nospam@...>

Ok, folk, time to try again. It's nothing to do with SHA-1.

61 messages 2002/06/20
[#42831] Re: Why is I/O slow? — Clifford Heath <cjh_nospam@...> 2002/06/21

Yukihiro Matsumoto wrote:

[#42836] RE: Why is I/O slow? — "Mike Campbell" <michael_s_campbell@...> 2002/06/21

> With respect, this doesn't sound like a smart idea. The glibc folk have

[#42838] Re: Why is I/O slow? — Albert Wagner <alwagner@...> 2002/06/21

On Thursday 20 June 2002 10:10 pm, Mike Campbell wrote:

[#42839] Re: Why is I/O slow? — Austin Ziegler <austin@...> 2002/06/21

On Fri, 21 Jun 2002 12:16:24 +0900, Albert Wagner wrote:

[#42928] GOOD DEAL — "DR. ISA BELLO" <dr_isa@...>

FROM:DR ISA BELLO

11 messages 2002/06/22

[#42982] No exceptions from String#to_i — "Hal E. Fulton" <hal9000@...>

I've been bitten by this before... maybe

19 messages 2002/06/24
[#42983] Re: No exceptions from String#to_i — ts <decoux@...> 2002/06/24

>>>>> "H" == Hal E Fulton <hal9000@hypermetrics.com> writes:

[#42986] Re: No exceptions from String#to_i — Nikodemus Siivola <tsiivola@...> 2002/06/24

[#43122] Re: help (ruby-talk ML) — Benjamin Peterson <bjsp123@...>

20 messages 2002/06/27
[#43123] Re: help (ruby-talk ML) — Dave Thomas <Dave@...> 2002/06/27

Benjamin Peterson <bjsp123@yahoo.com> writes:

[#43124] RE: help (ruby-talk ML) — Bob Calco <robert.calco@...> 2002/06/27

Yes, I would gladly volunteer considerable effort to this end. I have

[#43147] Ruby on Mac OS X — Tobias Reif <tobiasreif@...>

Hi,

24 messages 2002/06/28

[#43174] eruby SAFE question — Dylan Northrup <docx@...>

I'm trying to implement a replacement for the standard apache file listings

39 messages 2002/06/28
[#43249] documentation licenses (was: eruby SAFE question) — Tobias Reif <tobiasreif@...> 2002/06/30

Dave Thomas wrote:

[#43250] Re: documentation licenses (was: eruby SAFE question) — Dave Thomas <Dave@...> 2002/06/30

Tobias Reif <tobiasreif@pinkjuice.com> writes:

[#43255] RE: documentation licenses (was: eruby SAFE question) — <james@...> 2002/06/30

>

[#43280] Re: documentation licenses (was: eruby SAFE question) — "Juergen Katins" <juergen.katins@...> 2002/07/01

Tobias Reif wrote

[#43282] Re: documentation licenses (was: eruby SAFE question) — David Alan Black <dblack@...> 2002/07/01

On Mon, 1 Jul 2002, Juergen Katins wrote:

[#43381] RE: documentation licenses (was: eruby SAFE question) — <james@...> 2002/07/02

> From: David Alan Black [mailto:dblack@candle.superlink.net]

Re: Relational operators redux (returning RHS)

From: Austin Ziegler <austin@...>
Date: 2002-06-13 18:35:00 UTC
List: ruby-talk #42427
On Fri, 14 Jun 2002 02:05:07 +0900, Christoph wrote:
> "Austin Ziegler" <austin@halostatue.ca> wrote in
>> is fundamentally sound (warning; the following is untested
>> air-code).
> Still way above my standard;-)

Heh. Actually, it was tested, and I just forgot to remove that out.

>> alias :oeq, :==
>> 
>> def == (other)
>>     if other.nil?
>>         false
>>     elsif oeq(other)
>>         other
>>     else
>>         false
>>     end
>> end
> This would also imply false == false # => false

Just as we'd have to do with NilClass#==, FalseClass#== would be
necessary:

class FalseClass
    def ==(other)
        if other.kind_of?(FalseClass)
            true
        else
            false
        end
    end
end

Or something like that. It's not pretty, but I think that there's
few edge cases around this particular concept which would have to be
dealt with, and NilClass#== and FalseClass#== should take care of
most of them. I think. (The fact that most classes seem to get their
#== from Comparable helps.)

>> As I said, I *like* the idea that nil isn't equal to anything,
>> including nil.

> I don't like this idea, and I am not so sure if the C-heritage of
> 
> nan = 0.0 / 0.0
> nan.equal? nan # => true but
> nan == nan # => false
> 
> is really such a good idea.

I don't see why it's a bad idea. It does present a few surprises to
people who aren't used to a language distinguishing between 0 and
NULL, but it's intimately familiar to people who do anything with
SQL databases. Literally, when I set colval = NULL in a database, I
am setting it to an 'unset' value, which means that I can't possibly
trust anything about that value except the fact that it's unset.

It's rather like doing the following in C (dangerous and stupid):

    int *p, *c;

    if (*p == *c)
        puts("Miracle!");

We haven't initialised the pointers p & c, so we're picking up
whatever values are there. The likelihood of these values actually
matching is minimal. In C, NULL is simply 0, which represents its
*own* danger. I think that Ruby has a great step toward what I
consider Very Good NULL value handling (the more explicitly you
handle unset values, the better, as far as I'm concerned), but I
think that this would actually make it even better (that is, more
explicit).

If something isn't a "real" value -- much like NaN isn't a real
value but a concept, the same with nil, why should testing that
imaginary value against itself result in equality? By definition,
these 'values' aren't actually values, but concepts.

Just my .02 Canadian,
-a
-- Austin Ziegler, austin@halostatue.ca on 2002.06.13 at 14.22.12


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