[#80776] prerelease of Guis-1.3pre1 (a GTK widget server) for Ruby — Basile STARYNKEVITCH <basile@...>

Dear All,

11 messages 2003/09/01

[#80849] Simple question(s) — Michael Campbell <michael_s_campbell@...>

(I think...)

16 messages 2003/09/02

[#80870] show me the ruby way — nord ehacedod <nordehacedod@...>

This works, but there must be a more natural way to do

18 messages 2003/09/02
[#80916] Re: show me the ruby way — aero6dof@... (Alan Chen) 2003/09/02

ts <decoux@moulon.inra.fr> wrote in message news:<200309021525.h82FPkM17085@moulon.inra.fr>...

[#80918] Re: show me the ruby way — "Warren Brown" <wkb@...> 2003/09/02

alan,

[#80873] RDoc: how to turn off automatic linking for a word? — leikind@... (Yuri Leikind)

Hello all,

12 messages 2003/09/02
[#80962] Re: RDoc: how to turn off automatic linking for a word? — William Webber <wew@...> 2003/09/03

On Wed, Sep 03, 2003 at 12:32:23AM +0900, Yuri Leikind wrote:

[#81014] unknown node type 0 — Hal Fulton <hal9000@...>

Hello, all.

15 messages 2003/09/03

[#81028] webrick and ruby — ahoward <ahoward@...>

12 messages 2003/09/03

[#81057] WEBrick and mod_ruby performance — quixoticsycophant@... (Jeff Mitchell)

I've been scoping out ruby for an upcoming server project.

16 messages 2003/09/03

[#81075] Unit Tests and Encapsulation — Scott Thompson <easco@...>

This may be off-topic in a Ruby list, although I have noticed that a

18 messages 2003/09/04

[#81167] Difference between .. and ... in boolean ranges — Oliver Dain <odain2@...>

I'm a bit confused by some Ruby behavior I'm seeing with ranges. As I

12 messages 2003/09/04

[#81234] Correction: "religious" — Daniel Carrera <dcarrera@...>

It has come to my attention that the word religious can, indeed, be

12 messages 2003/09/05

[#81239] rcalc 2.0 (Ruby Calculator) — "Josef 'Jupp' Schugt" <jupp@...>

Saluton!

14 messages 2003/09/05

[#81345] ANN: MetaTags 1.0 — Ryan Pavlik <rpav@...>

MetaTags 1.0

73 messages 2003/09/08
[#81361] Re: ANN: MetaTags 1.0 — Tobias Peters <tpeters@...> 2003/09/08

Ryan Pavlik wrote:

[#81371] Re: ANN: MetaTags 1.0 — why the lucky stiff <ruby-talk@...> 2003/09/08

On Monday 08 September 2003 06:58 am, Tobias Peters wrote:

[#81384] Re: ANN: MetaTags 1.0 — Chad Fowler <chad@...> 2003/09/08

On Tue, 9 Sep 2003, why the lucky stiff wrote:

[#81386] Re: ANN: MetaTags 1.0 — dblack@... 2003/09/08

Hi --

[#81394] Re: ANN: MetaTags 1.0 — why the lucky stiff <ruby-talk@...> 2003/09/08

On Monday 08 September 2003 12:08 pm, dblack@superlink.net wrote:

[#81396] Re: ANN: MetaTags 1.0 — Hal Fulton <hal9000@...> 2003/09/08

why the lucky stiff wrote:

[#81452] Re: ANN: MetaTags 1.0 — matz@... (Yukihiro Matsumoto) 2003/09/09

Hi,

[#81454] Re: ANN: MetaTags 1.0 — Dave Thomas <Dave@...> 2003/09/09

[#81615] Re: ANN: MetaTags 1.0 — Richard Kilmer <rich@...> 2003/09/10

On Monday, September 8, 2003, at 11:59 PM, Dave Thomas wrote:

[#81374] problem with Module#append_features — Ferenc Engard <ferenc@...>

Hi all,

24 messages 2003/09/08

[#81503] Memory consumption of Ruby/mod_ruby combo on Apache — David Heinemeier Hansson <david@...>

I'm seeing memory consumption in the area of 30-35mb per Apache process

12 messages 2003/09/09
[#81504] Re: Memory consumption of Ruby/mod_ruby combo on Apache — mgarriss <mgarriss@...> 2003/09/09

David Heinemeier Hansson wrote:

[#81535] using a filter inside Ruby — Eric Schwartz <emschwar@...>

I've the contents of a raw log file in memory, and a program that will

12 messages 2003/09/09

[#81587] Fwd: Calling fun taking struct and not pointer to struct? — Robert Feldt <feldt@...>

Related to the recent thread about nested structs

16 messages 2003/09/10
[#81590] Re: Calling fun taking struct and not pointer to struct? — "Nathaniel Talbott" <nathaniel@...> 2003/09/10

Robert Feldt [mailto:feldt@ce.chalmers.se] wrote:

[#81594] Re: Calling fun taking struct and not pointer to struct? — Robert Feldt <feldt@...> 2003/09/10

Nathaniel Talbott <nathaniel@NOSPAMtalbott.ws> skrev den Wed, 10 Sep 2003 22:42:24 +0900:

[#81596] Re: Calling fun taking struct and not pointer to struct? — "Nathaniel Talbott" <nathaniel@...> 2003/09/10

Robert Feldt [mailto:feldt@ce.chalmers.se] wrote:

[#81597] Re: Calling fun taking struct and not pointer to struct? — Robert Feldt <feldt@...> 2003/09/10

Nathaniel Talbott <nathaniel@NOSPAMtalbott.ws> skrev den Thu, 11 Sep 2003 00:06:18 +0900:

[#81612] What *are* variables? Which are nil now? — Hugh Sasse Staff Elec Eng <hgs@...>

Reading about reflection, ObjectSpace will give you the objects in

22 messages 2003/09/10
[#81632] Re: What *are* variables? Which are nil now? — Austin Ziegler <austin@...> 2003/09/10

> raise "@b1 is nil" if @b1.nil

[#81623] Chasing a garbage collection bug — "Thomas Sondergaard" <thomas@...>

I just discovered that I have a GC related bug, or that is to say it doesn't

17 messages 2003/09/10

[#81755] Passing an Object Class from a method to a caller — "RLMuller" <RLMuller@...>

Hi All,

14 messages 2003/09/11

[#81840] Re: Dir.foreach not with patterns? — "Weirich, James" <James.Weirich@...>

I like the Dir[] form (or its "glob" alternative). I used to write

14 messages 2003/09/12
[#82500] Re: Dir.foreach not with patterns? — Jason Creighton <androflux@...> 2003/09/19

On Thu, 18 Sep 2003 15:59:25 +0100

[#81871] Duck Typing — Jim Weirich <jweirich@...>

In the Method Redefinition thread, this explanation of Duck Typing is

38 messages 2003/09/13
[#81884] Re: Duck Typing — dblack@... 2003/09/13

Hi --

[#81929] actual debian ruby packages are unuseable with tk — Ferenc Engard <ferenc@...>

Dear debian ruby package maintainers,

12 messages 2003/09/13

[#81960] Dot versus double-colon — Hal Fulton <hal9000@...>

OK, I've been thinking (always dangerous after 11 pm).

18 messages 2003/09/14

[#82012] performance and style advice requested — Alex Martelli <aleaxit@...>

I'm trying to learn some Ruby, so I want to write some Ruby code, starting

53 messages 2003/09/14
[#82028] Re: performance and style advice requested — Ben Giddings <bg-rubytalk@...> 2003/09/14

Some style advice:

[#82029] Linguistics 0.02 — Michael Granger <ged@...>

Hi fellow Rubyists,

19 messages 2003/09/14

[#82056] Test::Unit -- multiple errors in test method ??? — Johan Holmberg <holmberg@...>

14 messages 2003/09/15

[#82166] scrambler one-liner — Xavier Noria <fxn@...>

I just came across this interesting article at Slashdot that explains that

27 messages 2003/09/16

[#82206] #{} and \" don't like each other — Peter <Peter.Vanbroekhoven@...>

From the Programming Ruby book:

32 messages 2003/09/16

[#82419] wiki reccomendations — ahoward <ahoward@...>

15 messages 2003/09/18

[#82448] closing stderr — Michael Garriss <mgarriss@...>

I would like to prevent some output that is going to stderr during a

15 messages 2003/09/18

[#82547] fork not available? — walter@...

I am running windows 2000 using the PragProgs install.

14 messages 2003/09/19

[#82561] Trouble with binary files? — <agemoagemo@...>

I'm trying to write a program that will read a binary

24 messages 2003/09/19
[#82562] Re: Trouble with binary files? — Heinz Werntges <werntges@...> 2003/09/19

agemoagemo@yahoo.com wrote:

[#82583] Re: Trouble with binary files? — Tim Hammerquist <tim@...> 2003/09/19

<agemoagemo@yahoo.com> graced us by uttering:

[#82575] Article on oreilly.net on how to build Unix tools with Ruby — Xavier <NOSPAM@...>

Thought you'd like to know about this article

24 messages 2003/09/19
[#82829] Re: Article on oreilly.net on how to build Unix tools with Ruby — Paul Brannan <pbrannan@...> 2003/09/23

On Sat, Sep 20, 2003 at 06:00:21AM +0900, Xavier wrote:

[#82589] POP3Filter for SoBig.F Virus: — Austin Ziegler <austin@...>

Here's an updated version of the Ruby pop3filter that was written. This

32 messages 2003/09/20
[#82592] Re: POP3Filter for SoBig.F Virus: — Austin Ziegler <austin@...> 2003/09/20

I've made more updates. Rather than just putting them here, I've created a

[#82609] Re: POP3Filter for SoBig.F Virus: — Austin Ziegler <austin@...> 2003/09/20

On Sat, 20 Sep 2003 10:14:39 +0900, Austin Ziegler wrote:

[#82617] Re: POP3Filter for SoBig.F Virus: — "Shashank Date" <sdate@...> 2003/09/20

[#82618] Re: POP3Filter for SoBig.F Virus: — Gavin Sinclair <gsinclair@...> 2003/09/20

On Saturday, September 20, 2003, 9:03:18 PM, Shashank wrote:

[#82621] Re: POP3Filter for SoBig.F Virus: — Austin Ziegler <austin@...> 2003/09/20

On Sat, 20 Sep 2003 22:15:40 +0900, Gavin Sinclair wrote:

[#82623] Re: POP3Filter for SoBig.F Virus: — Jose Quesada <quesadaj@...> 2003/09/20

On Sat, 20 Sep 2003 23:52:39 +0900, Austin Ziegler <austin@halostatue.ca>

[#82624] Re: POP3Filter for SoBig.F Virus: — Xavier Noria <fxn@...> 2003/09/20

On Saturday 20 September 2003 18:56, Jose Quesada wrote:

[#82632] Real emails on newsgroup version (was Re: POP3Filter) — Ben Giddings <bg-rubytalk@...> 2003/09/20

This whole worm thing brings up a question:

[#82683] Re: Real emails on newsgroup version (was Re: POP3Filter) — Dave Thomas <Dave@...> 2003/09/22

[#82661] Performance: Ruby vs Java — lalit_pant@... (Lalit Pant)

I'm a newcomer to Ruby, and thought I would write a little

18 messages 2003/09/22

[#82715] Ruby package for Linux — Jim Freeze <jim@...>

Ok, I know nothing about linux packages.

22 messages 2003/09/22

[#82832] upper to lower first letter of a word — yvon.thoravallist@... (Yvon Thoraval)

Recently, i get a vintage list (more than 500 items) with poor typo, for

30 messages 2003/09/23

[#82884] When threads block — Hans Fugal <fugalh@...>

It's difficult to do any serious multi-threaded network programming when

13 messages 2003/09/24

[#82964] Re: Prove internet package for Microsoft Internet Explorer — "Anthony Neville" <anthony.neville@...>

13 messages 2003/09/25

[#83002] TCPSocket.gethostbyname difficulties — "Nathaniel Talbott" <nathaniel@...>

I'm trying to use TCPSocket.gethostbyname to verify that a given domain

35 messages 2003/09/25
[#83006] Re: TCPSocket.gethostbyname difficulties — Peter <Peter.Vanbroekhoven@...> 2003/09/25

> I can browse to either of those hosts, so what's different about them? Any

[#83014] Re: TCPSocket.gethostbyname difficulties — "Nathaniel Talbott" <nathaniel@...> 2003/09/26

Peter [mailto:Peter.Vanbroekhoven@cs.kuleuven.ac.be] wrote:

[#83030] Re: TCPSocket.gethostbyname difficulties — ts <decoux@...> 2003/09/26

>>>>> "N" == Nathaniel Talbott <nathaniel@NOSPAMtalbott.ws> writes:

[#83035] Re: TCPSocket.gethostbyname difficulties — "Nathaniel Talbott" <nathaniel@...> 2003/09/26

ts [mailto:decoux@moulon.inra.fr] wrote:

[#83036] Re: TCPSocket.gethostbyname difficulties — ts <decoux@...> 2003/09/26

>>>>> "N" == Nathaniel Talbott <nathaniel@NOSPAMtalbott.ws> writes:

[#83037] Re: TCPSocket.gethostbyname difficulties — "Nathaniel Talbott" <nathaniel@...> 2003/09/26

ts [mailto:decoux@moulon.inra.fr] wrote:

[#83011] Adding, removing and redefining features at runtime — "Thomas Sondergaard" <thomas@...>

I am working on an article on the subject of implementing dynamically typed

23 messages 2003/09/26

[#83105] Fwd: FW: Porting Suggestions: Lucene to Ruby; Perl Text::Balanced — Erik Hatcher <erik@...>

I was alerted about me being mentioned on ruby-talk, as I was not

12 messages 2003/09/27
[#83117] OT: alerts - was Re: Fwd: FW: Porting Suggestions: Lucene to Ruby; Perl Text::Balanced — Hal Fulton <hal9000@...> 2003/09/27

Erik Hatcher wrote:

[#83140] Thoughts on yield — nolan_d@... (Nolan J. Darilek)

I've begun working on a music-related ruby project, and recently I've

17 messages 2003/09/28

[#83223] Article on ARTIMA — Peter Hickman <peter@...>

There is the start of a series of articles on ARTIMA with Matz.

21 messages 2003/09/29

[#83310] Making == symmetric? — elbows@... (Nathan Weston)

It has always bothered me that == is not symmetric in ruby:

22 messages 2003/09/30

Re: performance and style advice requested

From: Ben Giddings <bg-rubytalk@...>
Date: 2003-09-15 22:40:34 UTC
List: ruby-talk #82127
Alex Martelli wrote:
> Heh -- matter of taste, I guess; what _I_ personally find ugly is
> that leading $, and I left the underscores in to try to ameliorate
> that.  Of course, nothing stops you from moving to a camelCaseish
> $factMemo -- however, not only do I personally find that less
> readable, but I'd also like to leave a hint that the memo is an
> internal implementation detail, not a feature meant for external
> consumption, and I like the convention of a leading _ for that.
> (Of course, I _could_ wrap up the fact function and its memo in
> a single package in any of various ways, I'm sure, so the "hint"
> aspect is quite secondary).

Sorry, I wasn't completely clear.  It's the leading underscores that I 
object to.  I don't mind underscores_in_names at all.  The reason I 
dislike leading underscores is that they tend to be holdovers to 
languages that don't have proper access control.  (C mostly)

In any situation where someone is tempted to use them, I find that they 
normally should be using something else (like using instance variables 
which are by their nature private).

As for the ugliness of '$', it has been said that it is supposed to be 
ugly.  Global variables in general are ugly code, and so people tend to 
avoid using '$', making their programs better.

> However, it will be very rare for any given x to NOT be already
> memoized (i.e., fact is called with a very modest variety of
> arguments, compared to the number of calls to it, in any typical
> combinatorial-arithmetic application); while calls with x<0 are
> going to be exceedingly rare.  So, the relative costs of array
> indexing vs (operator< + conditional) shouldn't matter -- trying
> to get the result off the array first _should_ be a win anyway
> (or at least, that's what my optimization experience as built on
> a wide variety of languages tells me -- admittedly I have no such
> experience in Ruby, but I fail to see how it would differ on this
> specific point).

Ah, I see what you mean.  I'm sure you're right that it's faster the way 
you now have it.  I didn't think things through fully and realize that 
95% of the time the number will be positive and so it will have to 
evaluate the conditional then do the array lookup.  It is also going to 
be *much* faster to do the array lookup rather than the triple 
conditional for the "comb" case.

> Actually, I find the oneliner body
> 
>     $_fact_memo[x] ||= if x<0 then 0 else x * fact(x-1) end
> 
> quite clear and readable, given that one must grok the semantics
> of ||= anyway.

Yeah.  That "||=" is a little hard the first time you notice it, but 
once you realize how useful it is, you'll use it so often it becomes 
second nature.

You could also use the other form, which as a C++ coder I'm sure you'd 
recognize:

$_fact_memo[x] ||= (x<0) ? 0 : fact(x-1)

Which also works in Ruby.  I don't like it as much, but it's a 
preference I guess.

> Very good point, and an excellent suggestion at least for concision &
> readability purposes -- I'll definitely keep the idiom
>     <container>[<index>] ||= <value>
> in mind for the future -- thanks!

Note it also works for non container objects:

var ||= "new val";

and in other types of expression:

var = other_var || "default val"

> Performance-wise, there ain't all that much in it for this app.
> 
> I've managed to scrounge some diskspace on Linux and compile both
> Python and Ruby (1.6.8 only, unfortunately -- the link I downloaded
> from mentioned 1.8, but I found out only when everything was built
> that I had 1.6.8 instead [how I found out: I had thoughtlessly left
> a trailing colon on an "if" statement -- 1.8 was quite cool about
> it, while 1.6.8 gave me three weird errors for that one mistake;-)].

If you have the chance to try it on Ruby 1.8 I (and others I'm sure) 
would be interested in hearing how it stacks up both to Python and to 
Ruby 1.6.

(In another post) Alex Martelli wrote:
>> While I doubt you should compare these languages on performance merits
> *blink* why not, pray?  While clarity, productivity, simplicity, and so on,
> are surely all crucial attributes in a language, what's wrong with wanting
> to ascertain how it performs (when used in the best/fastest way, at least)
> in typical problems in one's domains of interest...?

I don't think that it's wrong to compare the speed of the languages.  I 
just wouldn't be surprised if Python is faster by a healthy margin, 
especially for a very simple numerical program like this.  In Ruby, 
*everything* is an object, including numbers.  This has certain 
advantages, but definitely carries some speed penalties.

By using a scripting language rather than assembly or C, you've already 
decided you're willing to sacrifice some performance for ease of use.  I 
expect that both Perl and Python would beat Ruby in nearly any 
benchmark, but I find Ruby much easier to use than both.  For tasks 
where a scripting language is appropriate, I choose Ruby.



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