[#29932] Happy 2002! — "Rich Kilmer" <rich@...>

Happy New Year from Washington DC!

24 messages 2002/01/01
[#29938] RE: Happy 2002! — "James Britt (rubydev)" <james@...> 2002/01/01

>

[#29954] Re: Happy 2002! — Dinakar <Desai.Dinakar@...> 2002/01/01

"James Britt (rubydev)" wrote:

[#29991] Execing command with backquotes — mail02@... (Frank Benoit)

Hi

13 messages 2002/01/01

[#30101] Ruby Weekly News rdf feed now available — Dave Thomas <Dave@...>

12 messages 2002/01/03

[#30191] chomp for arrays? — dempsejn@...

Hi All,

25 messages 2002/01/04
[#30238] Re: chomp for arrays? — adamspitz@... (Adam Spitz) 2002/01/04

How about something like this?

[#30248] Re: chomp for arrays? — Massimiliano Mirra <list@...> 2002/01/05

On Sat, Jan 05, 2002 at 04:53:14AM +0900, Adam Spitz wrote:

[#30357] snippet exchange (was: Re: Re: chomp for arrays?) — David Alan Black <dblack@...> 2002/01/06

Hello --

[#30369] Re: snippet exchange (was: Re: Re: chomp for arrays?) — "Mark Hahn" <mchahn@...> 2002/01/06

A daydream of mine is a "super-require" that if the file was not found, the

[#30401] Re: snippet exchange (was: Re: Re: chomp for arrays?) — Dan Sugalski <dan@...> 2002/01/07

At 06:31 AM 1/7/2002 +0900, Mark Hahn wrote:

[#30195] should I use ruby instead of perl — vekkuli ketkutin <qvyht@...>

simple question...

25 messages 2002/01/04

[#30265] Structs and Marshalling — Albert Wagner <alwagner@...>

I keep getting myself tripped up when I Marshal Struct objects. I typically

18 messages 2002/01/05
[#30281] Re: Structs and Marshalling — ts <decoux@...> 2002/01/05

>>>>> "A" == Albert Wagner <alwagner@tcac.net> writes:

[#30334] Re: Structs and Marshalling — Albert Wagner <alwagner@...> 2002/01/06

On Saturday 05 January 2002 06:25 am, you wrote:

[#30473] Re: [ruby-talk:30334] Re: Structs and Marshalling — matz@... (Yukihiro Matsumoto) 2002/01/07

Hi,

[#30528] Possible bug with struct.c (Re: Re: Structs and Marshalling) — ts <decoux@...> 2002/01/07

>>>>> "Y" == Yukihiro Matsumoto <matz@ruby-lang.org> writes:

[#30546] Re: Possible bug with struct.c (Re: Re: Structs and Marshalling) — nobu.nokada@... 2002/01/07

At Tue, 8 Jan 2002 02:36:12 +0900,

[#30274] The Ruby Way — "Conrad Schneiker" <schneiker@...>

Hi,

31 messages 2002/01/05
[#30275] RE: The Ruby Way — "Curt Hibbs" <curt@...> 2002/01/05

> From: Conrad Schneiker [mailto:schneiker@jump.net]

[#30276] Re: The Ruby Way — "Curt Hibbs" <curt@...> 2002/01/05

That was supposed to say "how do I implement a hash with duplicate keys?"

[#30320] Sorting a Hash by value of integer stored in the Hash — Michael Joner <finalfrontier@...>

I have a program which creates a Hash array. The ultimate result is a

14 messages 2002/01/06

[#30327] one liner / overriden class repository — "Jack Dempsey" <dabigdemp@...>

Why aim if not high? :-)

15 messages 2002/01/06

[#30366] class name reported differently in different contexts — Joel VanderWerf <vjoel@...>

30 messages 2002/01/06
[#30380] Re: class name reported differently in different contexts — "Chr. Rippel" <chr_news@...> 2002/01/06

[#30496] Re: class name reported differently in different contexts — <ale@...> 2002/01/07

On Mon, 7 Jan 2002, Chr. Rippel wrote:

[#30372] [ANN] Invitation to join LotY (Language of the Year) project, 2002: learning Haskell — David Alan Black <dblack@...>

Dear fellow programmers,

10 messages 2002/01/06

[#30431] Re: snippet exchange (was: Re: Re: chomp for arrays?) — "Jack Dempsey" <dabigdemp@...>

The way i was thinking of this working would be this: someone has heard of a

14 messages 2002/01/07

[#30461] Re: the [ruby-talk] is gone? — "Jack Dempsey" <dabigdemp@...>

Hi Matz,

13 messages 2002/01/07

[#30494] Segfault with druby and fork — Michael Witrant <mike@...>

Hello,

24 messages 2002/01/07
[#30510] Re: Segfault with druby and fork — matz@... (Yukihiro Matsumoto) 2002/01/07

Hi,

[#30543] Re: Segfault with druby and fork — Michael Witrant <mike@...> 2002/01/07

On Tue, 8 Jan 2002 00:37:14 +0900

[#30640] Re: Segfault with druby and fork — matz@... (Yukihiro Matsumoto) 2002/01/08

Hi,

[#30644] An Update on the FreeRIDE Project — "Curt Hibbs" <curt@...> 2002/01/08

I wanted to give everyone an update on where we are with the FreeRIDE

[#30655] Re: An Update on the FreeRIDE Project — bobx@... (Bob) 2002/01/08

Documentation should also be a big(?) concern. I am new to Ruby as

[#30539] RDoc Alpha-6 available — Dave Thomas <Dave@...>

37 messages 2002/01/07

[#30737] rpkg 0.1 (long) — Massimiliano Mirra <list@...>

<yaaawn>

16 messages 2002/01/10

[#30866] Dir.entries have no home — Ron Jeffries <ronjeffries@...>

Chet and I were writing a little code manager yesterday and we wrote

38 messages 2002/01/11

[#30920] MetaRuby : RubySchema.rb howto? — Tobias Reif <tobiasreif@...>

Hi,

15 messages 2002/01/11
[#30953] Re: MetaRuby : RubySchema.rb howto? — Mathieu Bouchard <matju@...> 2002/01/12

[#30969] Re: MetaRuby : RubySchema.rb howto? — Tobias Reif <tobiasreif@...> 2002/01/12

Mathieu Bouchard wrote:

[#30949] Another suggestion for FreeRIDE — ptkwt@...1.aracnet.com (Phil Tomson)

Based on some discussions over at comp.lang.python...

13 messages 2002/01/12

[#31017] Why I think Ruby will eventually be more popular than Python — gandy@... (Thomas Gandy)

Ruby and Python both play in the same niche: they're both Object

9 messages 2002/01/12

[#31080] Best way for platf. independent compression? — Massimiliano Mirra <list@...>

Currently, rpkg builds packets by tar'ring and gzip'ping the source

25 messages 2002/01/13
[#31112] Re: Best way for platf. independent compression? — Chris Gehlker <gehlker@...> 2002/01/14

On 1/13/02 1:42 PM, "Massimiliano Mirra" <list@chromatic-harp.com> wrote:

[#31153] Re: Best way for platf. independent compression? — Massimiliano Mirra <list@...> 2002/01/14

On Mon, Jan 14, 2002 at 12:08:58PM +0900, Chris Gehlker wrote:

[#31085] Small Methods - a ramble — Ron Jeffries <ronjeffries@...>

I noticed in some code that Chet and I were writing that, as Smalltalkers, we tend to write really

45 messages 2002/01/13
[#31170] Re: Small Methods - a ramble — Brian Marick <marick@...> 2002/01/14

Ron Jeffries wrote:

[#31099] a wishlist for ruby 2.0 — Mathieu Bouchard <matju@...>

49 messages 2002/01/14
[#31237] Re: a wishlist for ruby 2.0 — matz@... (Yukihiro Matsumoto) 2002/01/15

Hi,

[#31276] Re: a wishlist for ruby 2.0 — Mathieu Bouchard <matju@...> 2002/01/15

[#31251] Swig Ruby documentation mods. — Hugh Sasse Staff Elec Eng <hgs@...>

I have been trying to use Swig Ruby recently, and in attempting to

10 messages 2002/01/15

[#31262] grabbing stuff from web pages — Ron Jeffries <ronjeffries@...>

Part of my web site has recommended books. I use the cover jpegs from

11 messages 2002/01/15

[#31275] how to get all the reserved words? — Tobias Reif <tobiasreif@...>

Hi;

16 messages 2002/01/15

[#31289] memory usage question — "Mark Hahn" <mchahn@...>

I need to write a script that will use a hash with 4 million strings of 16

30 messages 2002/01/15

[#31311] Vote for Windows Installer packages — Andrew Hunt <andy@...>

14 messages 2002/01/15

[#31404] Re: A question on Ruby Threads — "Tobias DiPasquale" <anany@...>

In article <a242re$gop@ftp.ee.vill.edu>, "Chris Gehlker"

15 messages 2002/01/16

[#31424] A few words on threads — "Avdi B. Grimm" <avdi@...>

Warning: many strong personal opinions and broad

14 messages 2002/01/16

[#31442] #59 Add fsync method to IO class — hensleyl@... (Leslie Hensley)

Adding fsync and fdatasync methods to the IO class will allow Ruby to

17 messages 2002/01/16

[#31512] Hello! Array sub classing? — Markt <markt@...>

Hello Ruby lovers!

23 messages 2002/01/17

[#31533] Possible bug in Mac version? — Dave Thomas <Dave@...>

16 messages 2002/01/17

[#31564] The first alternative RDoc template — Dave Thomas <Dave@...>

22 messages 2002/01/17

[#31658] dynamic method creation — "Albert L. Wagner" <alwagner@...>

I have a need to dynamically create methods with method names

16 messages 2002/01/18

[#31711] Re: zip on Linux — "Mirabai Neumann" <webmaster@...>

19 messages 2002/01/19

[#31727] Keeping track of multiple Ruby discussion sites. — "James Britt (rubydev)" <james@...>

Recently, Massimiliano Mirra wrote:

13 messages 2002/01/19

[#31735] installing mod_ruby --> seg fault in ruby-rdtool — craig@...

At least that's where core dumped. FreeBSD/Alpha (4.4-RELEASE). New to

16 messages 2002/01/19

[#31741] $_ as default parameter for a function — thomass@... (Thomas)

I'd like the fragment below to produce "blah blah", but it doesn't

15 messages 2002/01/19

[#31882] RANT: Ruby GUI API — Sean Russell <ser@...>

I started this rant in another thread, where it was way OT, so I'm moving

60 messages 2002/01/21

[#31937] Re: RANT: Ruby GUI API — Ben Crowell <crowell02@...>

M. Mirra wrote:

28 messages 2002/01/22
[#31948] Re: RANT: Ruby GUI API — John Carter <john.carter@...> 2002/01/22

On Tue, 22 Jan 2002, Ben Crowell wrote:

[#32056] Ruby Publishing Framework v0.5.0 — Bryan Murphy <bryan@...>

Ruby Publishing Framework

15 messages 2002/01/22

[#32106] about time for seperate lists? — "Tobias DiPasquale" <anany@...>

Hi all,

12 messages 2002/01/23

[#32121] : ruby-talk seperation — "Tobias DiPasquale" <anany@...>

Hi all,

19 messages 2002/01/23

[#32177] — Eugene Scripnik <Eugene.Scripnik@...>

I have a problem loading files from my script (I mean Kernel::load):

20 messages 2002/01/23
[#32187] — nobu.nokada@... 2002/01/23

Hi,

[#32722] Re: — Eugene Scripnik <Eugene.Scripnik@...> 2002/01/29

Hello nobu,

[#32728] Re: — nobu.nokada@... 2002/01/29

Hi,

[#32793] Re[2]: — Eugene Scripnik <Eugene.Scripnik@...> 2002/01/30

Tuesday, January 29, 2002, 5:05:05 PM, you wrote:

[#32799] $: in mod_ruby — nobu.nokada@... 2002/01/30

Hi,

[#32957] Re: $: in mod_ruby — Eugene Scripnik <Eugene.Scripnik@...> 2002/02/01

Wednesday, January 30, 2002, 4:55:23 PM, you wrote:

[#32233] Subclassing vs Subtyping (partly OOP vs FP) — Robert Feldt <feldt@...>

Hi,

16 messages 2002/01/24
[#33032] Re: Subclassing vs Subtyping (partly OOP vs FP) — Dave Thomas <Dave@...> 2002/02/03

Lewis Perin <perin@panix.com> writes:

[#32247] Array.last Weirdness — Jesse Jones <jesjones@...>

I'd expect the following code:

19 messages 2002/01/24

[#32312] Serious Array Bug in Ruby 1.6.6? — William Djaja Tjokroaminata <billtj@...>

Hi,

42 messages 2002/01/24
[#32315] Re: Serious Array Bug in Ruby 1.6.6? — David Alan Black <dblack@...> 2002/01/24

Hello --

[#32400] Re: Serious Array Bug in Ruby 1.6.6? — billtj@... (Bill Tj) 2002/01/25

Hi,

[#32404] Re: Serious Array Bug in Ruby 1.6.6? — David Alan Black <dblack@...> 2002/01/25

Hello --

[#32319] looking for an example problem to demonstrate TaskMaster — ptkwt@...1.aracnet.com (Phil Tomson)

I'm looking for suggestions here...

19 messages 2002/01/24

[#32355] RDoc learns to draw pictures... — Dave Thomas <Dave@...>

15 messages 2002/01/25
[#32377] Re: [ANN] RDoc learns to draw pictures... — "Pit Capitain" <pit@...> 2002/01/25

On 25 Jan 2002, at 9:34, Dave Thomas wrote:

[#32388] Ruby Developers Guide — Robert Feldt <feldt@...>

Hi,

16 messages 2002/01/25

[#32401] Sourcecode dump? — Olivier CARRERE <carrere@...>

Hello,

12 messages 2002/01/25

[#32417] Subrange of String subclass => invalid object — "Bob Alexander" <bobalex@...>

Given these conditions:

52 messages 2002/01/25

[#32445] "friend" alternative in Ruby? — kturing@... (kate turing)

I have a class "Foo". It has a method "doSecretStuff" that I want to

13 messages 2002/01/26

[#32465] rubyzip 0.3.1 — thomass@... (Thomas)

rubyzip 0.3.1 is out.

18 messages 2002/01/26

[#32593] OT: tools for creating documentation — ptkwt@...1.aracnet.com (Phil Tomson)

I'm going to be creating a good bit of documentation for TaskMaster and I

12 messages 2002/01/27

[#32646] popen3 and buffering — Paul Brannan <paul@...>

I have a program test.rb:

26 messages 2002/01/28

Re: a wishlist for ruby 2.0

From: "Daniel Berger" <djberg96@...>
Date: 2002-01-15 00:50:05 UTC
List: ruby-talk #31202
I'll respond to two comments in one stroke here...

"Tobias Reif" <tobiasreif@pinkjuice.com> wrote in message
news:3C42A3FF.9060504@pinkjuice.com...
> Daniel Berger wrote:
>
>
> > * Eliminate separate methods for "modify receiver in place" with some
other
> > mechanism.  Either modify the receiver based on calling context (void ==
> > modify, rvalue == don't modify), or provide a special generic method
that
> > modifies the receiver.
>
>
> Sounds interesting. Sample code? (using the new concepts, not
> implementing them)

First, a bit of history...

One day I whined to the Perl community that I wanted to create methods for
arrays, hashes and strings (all as objects, after I "blessed" them) that
returned different results based on the calling context.  The original
dilemma was that I *always* had to return a blessed reference if I wanted to
support method chaining, but being forced to de-reference every return value
annoyed me to no end.  First, I was told it was impossible.  Then, I found
the 'Want.pm' module which allowed me to do exactly what I wanted.  Then,
there was a bit of, "nah, nah, nah, nah...nah, nah", but I won't get into
that.

Here are the rules I came up with:

If an object calls a method in void context, the object is modified:

# receiver modified
array.uniq

If an object calls a method that is assigned to a variable (i.e. to an
lvalue), the object is not modified:

# receiver not modifed, uniq_vals contains unique values
uniq_vals = array.uniq

To accomplish both in one stroke, use the 'print' method (or whatever u want
to call it):

# receiver modified, uniq_vals contains unique values
uniq_vals = array.uniq.print

If a method is called as part of a chain, it modifies the receiver.  Only
the *last* method is checked for context.

The exceptions that I made (and which you can judge for yourself):

Methods that report values don't modify the receiver - mostly I'm referring
to boolean methods here.

Methods that are meant to explicitly delete values will delete the values,
regardless of context.

I have a couple more exceptions for my particular case (arrays), but I'm
trying to keep it generic here.

>"David Alan Black" <dblack@candle.superlink.net> wrote in message
news:Pine.LNX.4.30.0201141607220.12386-100000@candle.superlink.net...
>I don't mind the separate methods, but if I did... :-)  I wouldn't want
>the context to be the determinant.  For one thing, you might want to
>return a mapped array:

>  def add_three(a)
>    a.map {|e| e + 3}
>  end

> where you wouldn't want the receiver automatically modified.

Hopefully, my above examples make it clear that, if you assign the result,
the receiver *won't* be modified.  Here's some pseudo code:

def add_three(a)
   if want.lvalue
      b = a.copy
      b.map {|e| e + 3}
      return b
   else
      a.map{|e| e + 3}
      return a
   end
end

# Would modify receiver
array.add_three
new_array = array.add_three.print

# Would not modify receiver
new_array = array.add_three

>> Can you explain what you mean by a special generic method?

The other solution, to cut the gordian knot so to speak, would be to just
make the Ruby interpreter understand that an exclamation point at the tail
of any method name indicate that the receiver should be modified in place.
This would make our lives easier, but Matz's harder.

That clear things up?  Now, excuse me while I duck the onslaught of rotten
cabbages...

Regards,

Dan



In This Thread