[#11815] problems with DBM module — Eric Sven Ristad <ristad@...>
[#11822] RCR: Input XML support in the base Ruby — Dave Thomas <Dave@...>
Hi,
TAKAHASHI Masayoshi <maki@inac.co.jp> writes:
On Fri, 2 Mar 2001, Dave Thomas wrote:
David Alan Black <dblack@candle.superlink.net> writes:
[#11832] Re: RCR: Input XML support in the base Ruby — "Conrad Schneiker" <schneik@...>
Dave Thomas Wrote:
[#11868] Re: RCR: Input XML support in the base Ruby — "Mike Wilson" <wmwilson01@...>
Ok, first off I feel I am at least semi-intelligent
[#11876] Option to allow Python style indenting? — "chris" <nospam@6666666.com>
Don't know whether this discussion would be better here or on the email
[#11884] Re: Seeking Ruby/Tk sensei... — Kevin Smith <sent@...>
>Hal 9000 Fulton wrote:
[#11893] Re: rewrite with Ruby — ts <decoux@...>
>>>>> "M" == Max Ischenko <max@malva.com.ua> writes:
>>>>> "M" == Max Ischenko <max@malva.com.ua> writes:
I have a class where the initializer takes a filename
[#11915] Why I bought a second copy of The Book. — jfn@... (Jeremy Nelson)
It was the book that exposed me to ruby and caused me to absolutely fall
[#11960] Not Ruby, for me, for the moment at least — "Michael Kreuzer" <mkreuzer@... (nospam)>
I wrote on this newsgroup last weekend about how I was considering using
"Michael Kreuzer" <mkreuzer(nospam)@mail.usyd.edu.au> wrote in
[#11986] possible memory leak in GDBM/gdbm — Eric Sven Ristad <ristad@...>
The following program suggests there is a small memory leak in
[#12000] Re: Seeking Ruby/Tk sensei... — "Conrad Schneiker" <schneik@...>
Kevin Smith wrote:
[#12003] Re: How do I reach members from a Proc? — "Conrad Schneiker" <schneik@...>
Dave Thomas wrote:
[#12014] ANN: Memoize 0.1.2 — Robert Feldt <feldt@...>
Hi,
Robert Feldt <feldt@ce.chalmers.se> wrote in
[#12019] hooking/wrapping all of a classes methods — David Alan Black <dblack@...>
Hello --
[#12023] French RUG ? — "Jerome" <jeromg@...>
Hi fellow rubyers,
Tammo Freese <tammo.freese@offis.de> writes:
[#12048] Windows Installer questions — andy@... (Andrew Hunt)
[#12052] Re: RCR: shortcut for instance variable initialization — "Ben Tilly" <ben_tilly@...>
Dave Thomas <Dave@PragmaticProgrammer.com> wrote:
> From: Ben Tilly [mailto:ben_tilly@hotmail.com]
"Christoph Rippel" <crippel@primenet.com> writes:
[#12061] Ruby & AOP — "Dennis Decker Jensen" <dennisdecker@...>
Hi !
[#12093] Another hook — Dave Thomas <Dave@...>
[#12097] RCR: replacing 'caller' — Robert Feldt <feldt@...>
Hi,
[#12102] Re: Another hook — "Conrad Schneiker" <schneik@...>
Dave Thomas wrote:
[#12103] disassembling and reassembling a hash — raja@... (Raja S.)
Given a hash, h1, will the following always hold?
ts <decoux@moulon.inra.fr> writes:
[#12116] String.gsub() — Mike Bowler <mbowler@...>
The method String.gsub() isn't working the way I expected (or the way
[#12124] Is Ruby japanese-centered? — "Henning VON ROSEN" <hvrosen@...>
[matz writes]
In article <MABBIFGPDKFFOJPHLCLIOEAKCBAA.hvrosen@world-online.no>,
[#12135] Re: hash.invert loses data if equal values exist - is this the right behaviour? — Dave Thomas <Dave@...>
Tammo Freese <tammo.freese@offis.de> writes:
[#12144] New submissions to the Ruby Application Archive? — "Lyle Johnson" <ljohnson@...>
OK, I promise I looked around for this answer before posting here ;)
On Wed, 7 Mar 2001, Lyle Johnson wrote:
[#12155] RCR: Block form of Dir.chdir — Robert Feldt <feldt@...>
Hi,
[#12174] Nonblocking Read — Alex McHale <lists@...>
Hi there,
[#12179] Re: (long) Re: hash.invert loses data if equal values exist - is this the right behaviour? — Dave Thomas <Dave@...>
gotoken@math.sci.hokudai.ac.jp (GOTO Kentaro) writes:
Hi,
On Tuesday 06 March 2001 22:36, you wrote:
> From: Charles Hixson [mailto:charleshixsn@earthhlink.net]
[#12182] Re: Nonblocking Read] — Alex McHale <lists@...>
> IO#sysread is what you are looking for.
[#12204] FEATURE REQUEST: 'my' local variables — Leo Razoumov <see_signature@127.0.0.1>
Ruby is, indeed, a very well designed language.
>>>>> "GK" == GOTO Kentaro <gotoken@math.sci.hokudai.ac.jp> writes:
In message "[ruby-talk:12250] Re: FEATURE REQUEST: 'my' local variables"
Hi,
In message "[ruby-talk:12289] Re: FEATURE REQUEST: 'my' local variables"
On Monday 12 March 2001 00:39, GOTO Kentaro wrote:
Hi,
In message "[ruby-talk:12457] Re: FEATURE REQUEST: 'my' local variables"
matz@zetabits.com (Yukihiro Matsumoto) writes:
Hi,
On Tue, 13 Mar 2001, Yukihiro Matsumoto wrote:
> From: Stephen White [mailto:spwhite@chariot.net.au]
[#12229] random chars — Urban Hafner <the-master-of-bass@...>
Hello everybody, I think/hope I have some simple questions.
At 22:35 07.03.01 +0900, you wrote:
Tammo Freese <tammo.freese@offis.de> wrote:
[#12237] [ANN] NQXML v2.0 adds DOM, DOCTYPE, and ENTITY — Jim Menard <jimm@...>
NQXML is a pure Ruby implementation of an XML tokenizer, a SAX parser, and
[#12244] [ANN] NQXML v0.2.2 — Jim Menard <jimm@...>
In the spirit of "release early, release often", version 0.2.2 of NQXML can
[#12308] GUI Toolkit for Ruby — jjthrash@...
Hi all,
jjthrash@pobox.com wrote in message
[#12329] Math package — Mathieu Bouchard <matju@...>
In message "[ruby-talk:12329] Math package"
Hi,
[#12330] Haskell goodies, RCR and challenge — Robert Feldt <feldt@...>
Hi,
Hi,
On Sat, 10 Mar 2001, Yukihiro Matsumoto wrote:
[#12331] Re: Q re looping structures — ts <decoux@...>
>>>>> "M" == Mathieu Bouchard <matju@sympatico.ca> writes:
[#12332] ...and the challenge — Robert Feldt <feldt@...>
Hi again,
On Sat, 10 Mar 2001, Robert Feldt wrote:
> On Sat, 10 Mar 2001, Robert Feldt wrote:
[#12349] Can Ruby-GTK display Gif Png or Jpeg files? — Phlip <phlip_cpp@...>
Ruby-san:
Kent,
On Saturday 10 March 2001 15:30, Samantha Atkins wrote:
[#12369] Re: FEATURE REQUEST: 'my' local variables — Kevin Smith <sent@...>
matz@zetabits.com wrote:
[#12443] Re: ...and the challenge — "Benjamin J. Tilly" <ben_tilly@...>
>===== Original Message From Mathieu Bouchard <matju@sympatico.ca> =====
[#12444] class variables — Max Ischenko <max@...>
[#12446] Locale support in Ruby — Ollivier Robert <roberto@...>
Hello,
[#12523] rb_ary_each and hash — User Tcovert <tcovert@...>
awesome! thanks all!
[#12524] C++ is like teenage sex. — Stephen White <spwhite@...>
Forwarded message from glen mccready <gkm@petting-zoo.net> -----
[#12529] Re: Sum of Squares — "rashworth" <rashworth@...>
Thank you for your note. The new coding worked just fine.
[#12540] Strange segmentation fault problem with C++ extension — "Paul C" <paul_c@...>
Hi,
[#12601] http page download question — "Ian Marsman" <imarsman@...>
I am writing a script to download webpages from a favourite radio program
[#12606] Order, chaos, and change requests :) — Dave Thomas <Dave@...>
>>>>> "DT" == Dave Thomas <Dave@PragmaticProgrammer.com> writes:
[#12635] email address regexp — "David Fung" <dfung@...>
i would like to locate probable email addresses in a bunch of text files,
In article <m18zm531s9.fsf@halfdome.holdit.com>,
[#12646] police warns you -- Perl is dangerous!! — Leo Razoumov <see_signature@127.0.0.1>
I just read this story on Slashdot
On 14 Mar 2001 11:46:35 -0800, Leo Razoumov <see_signature@127.0.0.1> wrote:
On Wednesday 14 March 2001 15:40, Pete Kernan wrote:
On Fri, 16 Mar 2001, W. Kent Starr wrote:
[#12655] Re: FEATURE REQUEST: 'my' local variables — "Benjamin J. Tilly" <ben_tilly@...>
>===== Original Message From Leo Razoumov <see_signature@127.0.0.1> =====
[#12689] refactoring ruby code — Pat Eyler <pate@...>
To help myself learn more about Ruby, I'm starting to translate
[#12706] Library packaging — "Nathaniel Talbott" <ntalbott@...>
I have a project that I'm working on that needs to live two different lives,
"Nathaniel Talbott" <ntalbott@rolemodelsoft.com> writes:
Would it be possible to use some sort of jar style packaging - ie distribute
Hi,
matz@zetabits.com (Yukihiro Matsumoto) writes:
[#12738] Parser? — Hugh Sasse Staff Elec Eng <hgs@...>
Has anyone written a parser for Ruby in Ruby?
[#12754] assert_exception question — Pat Eyler <pate@...>
Okay, I'm reading along between several docs and now I'm confused ...
[#12768] Re: Tk Demo in Windows — ts <decoux@...>
>>>>> "R" == Ron Jeffries <ronjeffries@acm.org> writes:
[#12803] Deja vu? — Roy Smith <roy@...>
After years of reading people on c.l.python interject comments about Ruby,
On Tue, 20 Mar 2001 11:20:58 +0900, Hal E. Fulton
[#12821] units of measure — Mathieu Bouchard <matju@...>
[#12825] Floating point performance & Garbage collection — Jean-Sebastien ROY <jean-sebastien.roy@...>
I recently came across a little performance problem I have difficulties
In article
On Mon, 19 Mar 2001, Jean-Sebastien ROY wrote:
In article <Pine.LNX.3.96.1010319225134.15108F-100000@relayer>,
On Tue, 20 Mar 2001, Jean-Sebastien ROY wrote:
[#12829] converting a string to a class — "Doug Edmunds" <dae_alt3@...>
I want to concatenate strings which
[#12840] Looking for a decent compression scheme — Dave Thomas <Dave@...>
Dave Thomas wrote:
On Mon, 19 Mar 2001, Michael Neumann wrote:
Robert Feldt wrote:
[#12883] ruby-lang site — Ray Schneider <ray@...>
?
[#12892] find.rb — Tyler Wardhaugh <tgw@...>
Hello, I'm new Ruby and I like it very much. The dynamic extensibility
Hi,
"Christoph Rippel" <crippel@primenet.com> writes:
> From: dave@thomases.com [mailto:dave@thomases.com]On Behalf Of Dave
[#12895] differences between range and array — "Doug Edmunds" <dae_alt3@...>
This code comes from the online code examples for
On Tue, 20 Mar 2001, Hee-Sob Park wrote:
Jim Freeze <jim@freeze.org> writes:
On Tue, 20 Mar 2001, Dave Thomas wrote:
[#12905] Native/pthreads in Ruby — Christopher Petrilli <petrilli@...>
I read everything I could find in the archives talking about
Hi,
On Tue, Mar 20, 2001 at 05:34:27PM +0900, Yukihiro Matsumoto wrote:
[#12906] RubyConf 2001 update — "Guy N. Hurst" <gnhurst@...>
RubyConf 2001 Update
[#12921] fork problem??? — "Hal E. Fulton" <hal9000@...>
Hello all,
[#12929] Re: animal is onion as show stopper — "Conrad Schneiker" <schneik@...>
Apparently sleep-deprived Hal wrote:
[#12935] How to add accessors dynamically? — Ville Mattila <mulperi@...>
Hello
[#12941] rubicon version? — Hugh Sasse Staff Elec Eng <hgs@...>
ISTR that Rubicon was going into the CVS base of Ruby. Now 1.6.3 is out
[#12959] Re: differences between range and array — Kevin Smith <sent@...>
Guy N. Hurst wrote:
[#12960] TextBox ListBox — Ron Jeffries <ronjeffries@...>
Attached is a little Spike that Chet and I are doing. It is a
On Wed, 21 Mar 2001 04:36:38 +0900, rise <rise@knavery.net> wrote:
[#12991] [ANN] Lapidary 0.2.0 — "Nathaniel Talbott" <ntalbott@...>
Well, here's my first major contribution to the Ruby world: Lapidary. It's a
How is this different from RubyUnit?
>>>>> "Nathaniel" == Nathaniel Talbott <ntalbott@rolemodelsoft.com> writes:
jweirich@one.net [mailto:jweirich@one.net] wrote:
"Nathaniel Talbott" <ntalbott@rolemodelsoft.com> writes:
[#13020] instrumenting system resources — Eric Sven Ristad <ristad@...>
[#13028] mkmf question — Luigi Ballabio <luigi.ballabio@...>
[#13033] How do I properly munge stdout and stderr when using IO.popen? — Donald Sharp <sharpd@...>
Or alternatively is there a better way to do this?
In [ruby-talk:13033], Donald Sharp <sharpd@cisco.com> wrote:
I can't force the end user to choose a particular shell.
[#13039] extending existing classes. — Hugh Sasse Staff Elec Eng <hgs@...>
I've run up against something I thought I knew how to solve, but...
[#13046] Philosophical question: extension v. pure ruby — Colin Steele <colin@...2.com>
[#13054] Questions about ruby — Roy Patrick Tan <rtan@...>
Hi, I am preparing a presentation about Ruby, for the programming
[#13064] Lapidary questions — Paul Pladijs <ppladijs@...>
[#13079] Thread Safe — Rogers Gene A Civ 96 CG/SCTOB <gene.rogers@...>
Here's a question (stupid, maybe):
[#13086] Amusing contrast — Bob Kline <bkline@...>
I was struck by the discrepancy between this quote from the Ruby man
[#13099] xmlparser installation woes — Phil Suh <phil@...>
[#13117] ZPT, a next-generation template technology (repost) — "Conrad Schneiker" <schneik@...>
FYI. Thought some Rubies might be interested in this.
[#13138] How would Ruby say this? — "Lyle Johnson" <ljohnson@...>
One group of C++ functions I'm wrapping for FXRuby have signatures like
"Lyle Johnson" <ljohnson@resgen.com> writes:
[#13163] Re: Amusing contrast — Kevin Smith <sent@...>
Dave Thomas wrote:
[#13182] Re: email address regexp (fwd) — Paul Pladijs <paul.pladijs@...>
[#13185] Reading a file backwards — "Daniel Berger" <djberg96@...>
Hi all,
> Hi Dan,
On Sun, 25 Mar 2001, Daniel Berger wrote:
"Mathieu Bouchard" <matju@sympatico.ca> wrote in message
On Mon, 26 Mar 2001, Daniel Berger wrote:
Ernest Ellingson <erne@powernav.com> writes:
[#13225] Installation Woes — "John Kaurin" <jkaurin@...>
System: alphaev6-osf4.0f
[#13226] Re: Randal in Ruby-land? (was: email address regexp) — "Benjamin J. Tilly" <ben_tilly@...>
>===== Original Message From claird@starbase.neosoft.com (Cameron Laird) =====
[#13236] drb and "recycled objects" errors — Jimmy Olgeni <olgeni@...>
[#13240] hash problem — Urban Hafner <the-master-of-bass@...>
Hello everybody,
[#13246] Re: Randal in Ruby-land? (was: email address regexp) — "Conrad Schneiker" <schneik@...>
Mathieu Bouchard wrote:
Hi,
Hi,
> From: Yukihiro Matsumoto [mailto:matz@zetabits.com]
On Thu, 29 Mar 2001 23:11:03 +0900, Christoph Rippel pontificated:
On Fri, 30 Mar 2001, Pete Kernan wrote:
[#13255] This is going to sound crazy, but... — Dave Thomas <Dave@...>
[#13294] ruby slowww socket handling — Joseph McDonald <joe@...>
[#13303] Reloading files — "Nathaniel Talbott" <ntalbott@...>
First of all, a confession: Lapidary's GTK::TestRunner had a show stopper
[#13318] hash slice implementaion — "Hee-Sob Park" <phasis@...>
[#13369] Buffered and non-buffered IO — Lloyd Zusman <ljz@...>
Could anyone point me to some documentation that describes how I could
[#13374] Passing an array to `exec'? — Lloyd Zusman <ljz@...>
I'd like to do the following:
"Hee-Sob Park" <phasis@hananet.net> writes:
[#13388] Using Antlr for Ruby? (was RE: Re: why won't "( a) = 1" parse?) — Christophe Broult <cbroult@...>
Hi,
Hi,
[#13397] Multidimensional arrays and hashes? — Lloyd Zusman <ljz@...>
Is it possible in ruby to make use of constructs that correspond to
masa@stars.gsfc.nasa.gov writes:
> From: nosuzuki@e-mail.ne.jp [mailto:nosuzuki@e-mail.ne.jp]On Behalf Of
"Christoph Rippel" <crippel@primenet.com> writes:
[ruby-talk:13367] Re: f.call (x) revisited
In "Doug Edmunds" [ruby-talk:13363], <dae_alt3@juno.com> wrote:
> > a = 1 ; x = 1 ; f = proc {|a| a += 1}
> > f.call(x)
> > f.call(a)
> > a # results in 2 <<<???? SEE NOTE BELOW
>
> > a = 1 ; x = 1 ; f = proc {|a| a += 1}
> > f.call(a)
> > f.call(x)
> >a # results in 3 <<<??? SEE NOTE BELOW
>
> I decided to try out his example. I didn't get his results.
> I got 3 for the first result and 2 for the second.
> I have expanded the examples to try to see what is going on.
> I leave it to the group to explain:
This is all basically due to the scoping in Ruby. By the time the closure is encountered, the variable a has already been established as having scope outside the block.
In Ruby, the scope of local variables (that is, those variables without punctuation as in $a, @a, or @@a) inside blocks is such that any variables in existence before the block is encountered maintain their existence (and scope), and any variables not in existence before the block is encountered are local to the block (even if they are made to exist after the block is encountered).
> a) why f.call(x) is always 2
By calling f.call(x), you are calling f.call(1). The "|a|" part of the block makes the implicit assignment "a = 1". This alters the value of a outside the block since the scope of a is outside the block. Then the block is executed and a is incremented. Thus, a, after calling the closure, has a value of 2 (and will always have a value of 2 because x was 1).
> b) why f.call(a) is always 3 after f.call(x)
Continuing from the above statement, after f.call(x), a has a value of 2. When you then call f.call(a), you are calling f.call(2). The "|a|" part of the block makes the implicit assignment "a = 2". This alters the value of a outside the block (although a was already 2, so there is no apparent change). When the block is executed, a is incremented, resulting in the value 3.
> c) where the value of a is coming from in proc {|a| a += 1}
a is assigned to upon entering the block because of the |a| declaration. This block has the side effect (in this example) of altering the a outside the block because the scope of a has been established outside the block (and in fact, the a inside the block is the a outside the block).
Consider this:
a = 1; x = 1; f = proc {|c| c += 1}
f.call(a) # => 2
f.call(x) # => 2
a # => 1
x # => 1
c # => not defined
and this
a = 1; x = 1; c = 1; f = proc {|c| c += 1}
f.call(a) # => 2 (same as c = a; c += 1)
f.call(x) # => 2 (same as c = x; c += 1)
a # => 1
x # => 1
c # => 2
In the first example, c is not defined before the closure is encountered, so changing c in the closure has no effect outside the closure. In the second example, c is defined before the closure is encountered, so changing c in the closure has the effect of altering the c outside the closure.
The important thing to remember is that blocks and closures are not the same as methods. They, by definition, have an effect based on the "environment" in which they were encountered. Methods, on the other hand, are more independent of the "environment" in which they are encountered.
Understanding this may be one of the steps to fully appreciating Ruby's "harmony".
Cheers,
Henry.