[#98950] Strange behaviour of Strings in Range — Michael Neumann <mneumann@...>

Hi,

24 messages 2004/05/01

[#98975] Why no Proc##[]=() ? Why no Proc##replace() ? — Jean-Hugues ROBERT <jean_hugues_robert@...>

Hi,

15 messages 2004/05/01
[#98983] Re: Why no Proc##[]=() ? Why no Proc##replace() ? — Dan Doel <djd15@...> 2004/05/01

I'm not sure what your proposal means.

[#98997] Re: Why no Proc##[]=() ? Why no Proc##replace() ? — Jean-Hugues ROBERT <jean_hugues_robert@...> 2004/05/02

About class Proc; def []=(*args); self[*args] end end and the value of

[#98980] Ruby Newbie (ooh, that rhymes!) - When do I use do/end, when {}? — glenn_m_smith@... (Glenn)

Hello all

23 messages 2004/05/01

[#99105] What do you use Ruby for? — glenn_m_smith@... (Glenn)

OK, the more I read about Ruby (currently on page 29 of the FAQ,

25 messages 2004/05/03

[#99119] YAML vs. Marshal — dejaspam@... (Bill Atkins)

Is there any reason to use Marshal instead of YAML? Is there anything

21 messages 2004/05/03
[#99121] Re: YAML vs. Marshal — Joel VanderWerf <vjoel@...> 2004/05/03

Bill Atkins wrote:

[#99191] Re: YAML vs. Marshal — why the lucky stiff <ruby-talk@...> 2004/05/04

Joel VanderWerf wrote:

[#99192] Re: YAML vs. Marshal — Hal Fulton <hal9000@...> 2004/05/04

why the lucky stiff wrote:

[#99204] What so special about PostgreSQL and other RDBMS? — "Sarah Tanembaum" <sarah.tanembaum@...>

Beside its an opensource and supported by community, what's the fundamental

96 messages 2004/05/04

[#99270] Is Ruby Top 1 of Programming Languages that are Loved? — "Park Heesob" <phasis68@...>

Hi all,

66 messages 2004/05/05
[#99333] Re: [OT]Is Ruby Top 1 of Programming Languages that are Loved? — ptkwt@... (Phil Tomson) 2004/05/06

In article <83173408.0405051506.5db85fe6@posting.google.com>,

[#99358] Re: [OT]Is Ruby Top 1 of Programming Languages that are Loved? — Dick Davies <rasputnik@...> 2004/05/06

* Phil Tomson <ptkwt@aracnet.com> [0554 02:54]:

[#99378] Re: [OT]Is Ruby Top 1 of Programming Languages that are Loved? — "Ara.T.Howard" <ahoward@...> 2004/05/06

On Thu, 6 May 2004, Dick Davies wrote:

[#99326] RAA error - can't dup NilClass — Simon Strandgaard <neoneye@...>

When I try to enter my project page

15 messages 2004/05/06
[#99327] Re: RAA error - can't dup NilClass — "NAKAMURA, Hiroshi" <nahi@...> 2004/05/06

Hi,

[#99328] Re: RAA error - can't dup NilClass — "NAKAMURA, Hiroshi" <nahi@...> 2004/05/06

Hi, again,

[#99332] miniruby.exe & statically linked ruby.exe (Windows) — ptkwt@... (Phil Tomson)

I've been trying to build a statically linked ruby.exe on windows using

12 messages 2004/05/06

[#99399] DRb Connection Closed Error?!?!?!? — "Ken Hilton" <kenosis@...>

Greetings,

14 messages 2004/05/06

[#99438] What is Borges? — dejaspam@... (Bill Atkins)

Can someone please explain to me what Borges does? Its home page

41 messages 2004/05/07
[#99482] Re: What is Borges? — Dick Davies <rasputnik@...> 2004/05/07

* Bill Atkins <dejaspam@batkins.com> [0534 01:34]:

[#99530] Re: What is Borges? — Julian Fitzell <julian@...4.com> 2004/05/07

Dick Davies wrote:

[#99534] Re: What is Borges? — Carl Youngblood <carl@...> 2004/05/07

[#99527] Ruby Installer for Windows: use of Win32OLE bug causes crash — Jos Backus <jos@...>

This is with the latest Ruby Installer for Windows, 181-13-rc2.

11 messages 2004/05/07

[#99583] Ruby Installer for Windows 1.8.1-13 final — "Curt Hibbs" <curt@...>

The Ruby Installer 1.8.1-13 (final) for Windows has been released and

62 messages 2004/05/08
[#99643] Why Ruby? -- A Resource for Promoting Ruby — "Curt Hibbs" <curt@...> 2004/05/09

I'm pleased to announce the kickoff of RubyForge project called "Why Ruby?"

[#104934] Ruby Installer for Windows 1.8.2-14 Release Candidate — "Curt Hibbs" <curt@...> 2004/06/30

I have uploaded a release candidate for Ruby Installer that was built using

[#104952] **RC2** Ruby Installer for Windows 1.8.2-14 Release Candidate — "Curt Hibbs" <curt@...> 2004/07/01

The original release candidate that I posted earlier today did not include

[#105519] Re: [ANN] **RC2** Ruby Installer for Windows 1.8.2-14 Release Candidate — Lothar Scholz <mailinglists@...> 2004/07/07

Hello Curt,

[#105546] Re: [ANN] **RC2** Ruby Installer for Windows 1.8.2-14 Release Candidate — Hidetoshi NAGAI <nagai@...> 2004/07/08

Hi,

[#105550] Re: [ANN] **RC2** Ruby Installer for Windows 1.8.2-14 Release Candidate — nobu.nokada@... 2004/07/08

Hi,

[#99597] How to get the last 5 elements of an array? — Gavin Sinclair <gsinclair@...>

Hi,

20 messages 2004/05/08

[#99680] rubygarden homepage hacks — Simon Strandgaard <neoneye@...>

On daily basis the homepage at rubygarden is being edited.

19 messages 2004/05/09

[#99734] in search of a compelling reason to use ruby.... — Ryan Paul <segphault@...>

i'm a python programmer, and I have recently been hearing a lot about

28 messages 2004/05/10

[#99764] safe eval? — "Ara.T.Howard" <Ara.T.Howard@...>

20 messages 2004/05/10
[#99773] Re: safe eval? — Florian Gross <flgr@...> 2004/05/10

Ara.T.Howard wrote:

[#99834] Re: safe eval? — ts <decoux@...> 2004/05/11

>>>>> "F" == Florian Gross <flgr@ccan.de> writes:

[#99854] Proposal: Object#send(nil) -> self — Gavin Sinclair <gsinclair@...>

A quick one. I see some sense in Object#send accepting 'nil' as the

21 messages 2004/05/11

[#99879] Strange regexp behaviour in gsub — Kristof Bastiaensen <kristof@...>

Hi,

15 messages 2004/05/11

[#99945] Recommendations (Ruby making my head swim) — Mike Rhodes <rhodes553@...>

I recently bought "Programming Ruby" and set out to learn the language

13 messages 2004/05/12

[#99966] Major Addition Bug? — "Sean O'Dell" <sean@...>

Doing this:

57 messages 2004/05/12
[#99967] Re: Major Addition Bug? — ts <decoux@...> 2004/05/12

>>>>> "S" == Sean O'Dell <sean@celsoft.com> writes:

[#99970] Re: Major Addition Bug? — "Sean O'Dell" <sean@...> 2004/05/12

On Wednesday 12 May 2004 09:53, ts wrote:

[#100032] are there any ruby IDEs? — Ryan Paul <segphault@...>

I use vim most of the time, but i'm curious if there are any

35 messages 2004/05/12

[#100093] How to make combinations of an array to produce all possible expressions? — Erik Terpstra <erik@...>

I have an array 'conds', which contains some sub-expressions for an

11 messages 2004/05/13

[#100136] Ruby's Best -- Please Help — "Curt Hibbs" <curt@...>

On the "Why Ruby?" project wiki (http://whyruby.rubyforge.org/), I am trying

23 messages 2004/05/13
[#100284] Please revisit Ruby's Best and vote for additions — "Curt Hibbs" <curt@...> 2004/05/14

If you were an early visitor to:

[#100137] First Presentation Posted to Why Ruby! — "Curt Hibbs" <curt@...>

Assaph Mehr just posted the first presentation to Why Ruby

22 messages 2004/05/13
[#100172] Presenting a more unified front (Ruby webring?) — ptkwt@... (Phil Tomson) 2004/05/13

In article <EAENKKNOJPMNCDMLDOMLKEHHEFAA.curt@hibbs.com>,

[#100182] C++ Exception compatibility idea — Asfand Yar Qazi <im_not_giving_it_here@..._hate_spam.com>

Hi,

26 messages 2004/05/13
[#100206] Rite implementation in C++? (Objective C?) — ptkwt@... (Phil Tomson) 2004/05/13

In article <40A3E539.2010204@hypermetrics.com>,

[#100193] subclasses of string as hash keys — Matthias Georgi <matti_g@...>

15 messages 2004/05/13

[#100273] Regexp Error? — "Robert Klemme" <bob.news@...>

What's wrong here?

16 messages 2004/05/14

[#100295] Re: Regexp Error? — Michael Campbell <michael_s_campbell@...>

ts wrote:

15 messages 2004/05/14

[#100325] Re: Please revisit Ruby's Best and vote for additions — "Curt Hibbs" <curt@...>

James Britt wrote:

12 messages 2004/05/14

[#100395] Need Help Selecting a GUI — dejaspam@... (Bill Atkins)

As anyone can tell by looking at the topics of my recent posts, I'm

18 messages 2004/05/15

[#100461] Ruby on Rails — Matt Lawrence <matt@...>

Very neat presentation, it kept me up way too late last night watching it.

24 messages 2004/05/16

[#100511] How to duck type? - the psychology of static typing in Ruby — Tim Bates <tim@...>

Hi all,

83 messages 2004/05/17
[#100525] Re: How to duck type? - the psychology of static typing in Ruby — "SER" <ser@...> 2004/05/17

Broken record time:

[#100791] Re: How to duck type? - the psychology of static typing in Ruby — Marek Janukowicz <childNOSPAM@...17.ds.pwr.wroc.pl> 2004/05/19

On Thu, 20 May 2004 03:43:22 +0900, Dave Thomas wrote:

[#100613] FoX: removing widgets — Yuri Leikind <y.leikind@...>

Hello all,

16 messages 2004/05/18
[#100670] Re: FoX: removing widgets — Lyle Johnson <lyle@...> 2004/05/18

Yuri Leikind wrote:

[#100629] Newbie installation problem: libraries? — Paul Emmons <pemmons@...>

I have recently installed ruby-1.8.1 on my Mandrake Linux system.

11 messages 2004/05/18

[#100649] Windows desktop app w/ simple db; how? — "Kirk Haines" <khaines@...>

Imagine that you had a very simple web based application. It queries some

12 messages 2004/05/18

[#100653] Zero is true ... whoda thunk? — "Richard Lionheart" <NoOne@...>

Hi,

29 messages 2004/05/18
[#100655] Re: Zero is true ... whoda thunk? — Mark Sparshatt <msparshatt@...> 2004/05/18

Richard Lionheart wrote:

[#100682] Re: Zero is true ... whoda thunk? — Chris Pine <cpine@...> 2004/05/19

On Wed, 19 May 2004 06:34:54 +0900, Mark Sparshatt wrote:

[#100691] Re: Zero is true ... whoda thunk? — David Naseby <david.naseby@...>

>-----Original Message-----

14 messages 2004/05/19

[#100721] irb or xterm crash with UTF-8 — Simon Strandgaard <neoneye@...>

server> irb

15 messages 2004/05/19

[#100839] Where to download FXRuby library; where to put it; RUBYLIB, RUBYPATH env. vars — "Richard Lionheart" <NoOne@...>

Hi,

14 messages 2004/05/20

[#100862] Ruby's builtin Datastructures — Brian Schroeder <spam0504@...>

Hello all,

13 messages 2004/05/20

[#101071] Concerning version numbers... — Hal Fulton <hal9000@...>

A few people in recent weeks have been bemoaning the fact that software

15 messages 2004/05/22

[#101110] Ruby for educational purposes and localization — Laurent Julliard <laurent__no__@__spam__moldus.org>

All,

10 messages 2004/05/23

[#101165] make faster Richards benchmark — dlissett0@... (Duncan Lissett)

I'd appreciate any suggestions on how to make a faster Ruby

15 messages 2004/05/24

[#101226] Concerning package names — djberg96@... (Daniel Berger)

All,

13 messages 2004/05/24

[#101292] Numeric#of — "Ara.T.Howard" <ahoward@...>

53 messages 2004/05/25

[#101329] separating ruby-talk from comp.lang.ruby? — David Alan Black <dblack@...>

Hi --

65 messages 2004/05/25
[#101388] Re: separating ruby-talk from comp.lang.ruby? — ptkwt@... (Phil Tomson) 2004/05/25

In article <m3brkcda7g.fsf@wobblini.net>,

[#101391] Re: separating ruby-talk from comp.lang.ruby? — "David A. Black" <dblack@...> 2004/05/25

Hi --

[#101360] ruby-dev summary 23459-23562 — Minero Aoki <aamine@...>

Hi all,

30 messages 2004/05/25
[#101395] Re: ruby-dev summary 23459-23562 — Florian Gross <flgr@...> 2004/05/25

Minero Aoki wrote:

[#101369] defining condititions — Florian Weber <csshsh@...>

hi!

18 messages 2004/05/25

[#101522] WEBrick and FastCGI response — Jim Freeze <jim@...>

Reply-To:

15 messages 2004/05/27

[#101560] Re: separating ruby-talk from comp.lang.ruby? — "Mills Thomas (app1tam)" <app1tam@...>

Here, here, hear, hear. No NNTP here.

41 messages 2004/05/27
[#101565] Re: separating ruby-talk from comp.lang.ruby? — "David A. Black" <dblack@...> 2004/05/27

Hi --

[#101569] Re: separating ruby-talk from comp.lang.ruby? — Dave Thomas <dave@...> 2004/05/27

[#101571] Re: separating ruby-talk from comp.lang.ruby? — "David A. Black" <dblack@...> 2004/05/27

Hi --

[#101616] Re: separating ruby-talk from comp.lang.ruby? — "David A. Black" <dblack@...> 2004/05/28

Hi --

[#101686] Re: separating ruby-talk from comp.lang.ruby? — Dave Thomas <dave@...> 2004/05/28

[#101890] Re: separating ruby-talk from comp.lang.ruby? — "David A. Black" <dblack@...> 2004/05/31

Sorry everyone, testing again.... small meaningless tweak to

[#101674] Andreas' practical language comparison — "Georgy" <no.mail@...>

Hi all!

13 messages 2004/05/28

[#101745] Test::Unit: assert_follows_spec() (or something like that) — David Garamond <lists@...6.isreserved.com>

For deterministic functions/methods, the same set of inputs should

20 messages 2004/05/29

[#101823] gsub!, replace with \' — Patrick Gundlach <clr1.10.randomuser@...>

Dear Ruby-hackers,

14 messages 2004/05/30

[#101830] Behavior of application changes when adding non-relevant puts — felix.nawothnig@... (Felix Nawothnig)

Hi.

12 messages 2004/05/30

[#101853] mysql-ruby — Paul Vudmaska <paul@...>

%$@#%$ i know i've abused this list with more questions than answers but

14 messages 2004/05/31

[#101855] elegant way to say "try this thing, one at a time, until condition is met" — David Garamond <lists@...6.isreserved.com>

Example: I need to unmount /usr and /usr2, but currently I can't because

23 messages 2004/05/31

[#101899] RMagick available on Windows — Tim Hunter <cyclists@...>

Thanks to Kaspar Schiess, RMagick for Windows is now available at

13 messages 2004/05/31

Re: def [](v) xx; return yy; end # returned value is ignored !?

From: Jean-Hugues ROBERT <jean_hugues_robert@...>
Date: 2004-05-01 18:01:59 UTC
List: ruby-talk #98976
You may skip this msg if you don't care about a potential future
new construct in Ruby about pattern matching and assignments combined.

At 20:54 01/05/2004 +0900, robert wrote:
>"Jean-Hugues ROBERT" <jean_hugues_robert@yahoo.com> schrieb im Newsbeitrag
> >... Yet, I am missing the []=() where I do control the value
> >assigned to the lvalue.
>
>Well, you can get close by using the same approach that OpenStruct uses...

You're right. Thanks. I actually just got close with another trick:
Class Object
   def []()  self end
   def [](x) self end
end
Combined with my version of a Pointer class at
http://www.c2.com/cgi/wiki?SinisterSchemeSampleInRuby
it makes it almost possible to code methods than handle both Pointers and 
direct
objects. I just turned the problem upside-down: If I can't have 
auto-dereferencing
Reference objects, then always dereference and make it so that it does nothing
on non reference objects. Nota: for classes where [] is redefined, some more
tricky work would be necessary to turn this protypical code into production 
one.

def meth( x ) x[] = [x[], "world"] end
# By Val: Returns [x, "world"]
# By Ref: x's content becomes [previous x's content, "world"]

v   = nil
r   = Pointer.new( {:v})
r[] = :hello
p r # => <Pointer v>:hello
p v # => :hello
meth( r) # By ref
p r # => <Pointer v>[:hello, "world"]
v = meth( v) # By val, => [:hello, "world"]

>The problem is that to achieve what you want the language would need to be
>radically changed and I don't think it's a good idea to allow for global
>redefinition of =.  That could wreak too much havoc on existing code.

I am not going to propose anything radical. The RCR proposes 2 new builtins,
"assign" & "match", 1 optional unary op, "ref", plus 3 constants "free"
"bound" & "tail", and a Class, Lvalue. That does not include allowing for
global redefinition of =.

If implemented, some new syntax becomes available:
assign [ref a, ref b], [1,2] # eqv a, b = [1,2]
match [ref a, "toto"], x     # eqv a = x[0] if x == [x[0],"toto"]

def meth( *p )
   assign [ref a, ref b], p
   match [a,b], [2,3]
eqv: def meth( a = 1, b = 2)

def meth( *p )
   raise ArgumentError unless match [ref a = bound], p
eqv: def meth( a )

def meth( *p )
   assign [[ref a]], p
eqv: def meth( (a,) ) # Not valid for def today, only for proc

proc { |*p|
   assign [ref x], p
   match x, nil
eqv: proc { |x = nil| # Not valid for proc today, only for def

def meth( h )
   assign { name: ref n, color: ref c }, h
   match [n,c], ["w",:white]
eqv: def meth( name: n = "w", color: c = :white ) ??? 1.9 ?

if match [free,ref c], x then
   assert { x.kind_of? Array }
   assert { x.length == 2    }
   assert { c == x[1]        }

if match {msg: ref c = "hello"}, x then
   assert { x.kind_of? Hash    }
   assert { x.include? :msg   }
   assert { x[:msg] == "hello" }
   assert { c == "hello"       }

patt = [ref f, ref t = tail]
if assign patt, a_list then
   assert { a_list.length >= 1 }
   assert { f == a_list[0]     }
   assert { t == a_list[1..-1] }

If you got it so far, try to imagine what this can do
when objs have a is_a? relationship:
   match obj1, obj2
or this: match obj1, obj2, obj3
or (much more tricky): match obj
One hint: some instance variables can be Lvalue objects.

Much more in the future RCR. I believe match/assign are
reasonably easy to implement, efficient and very expressive.
I hope the RCR will communicate that belief.

>Btw, by adding:
>class Scope
>   def with(&b)
>     instance_eval &b
>   end
>end
>You can use variables that you have defined already quite naturally:
>irb(main):034:0> env.x=10
>=> 10
>irb(main):035:0> env.with { p x; x = 20; p x; p self }#
>10
>20
>#<Scope:0x10182e60 @x=10>

That's nice ! I almost missed a "this" variable to access the
"self" of the invoker:
class Scope
   def with(&b)
      self.this = eval( :self, b)
      instance_eval &b
   end
end
env.with { p "I can have my #{self} cake and eat #{this} too" }

> >    - Future, a Future is the returned value of an asynchronous method call
> > that is waited for when it is needed, not before.
> >    - LogicVariable, a LogicVariable is a variable that can be free in
> > addition to being bound to some value as regular variables are.
>
>IMHO there are lots of ways to do what you want in Ruby, only the exact way
>you want is not possible.  Sometimes it's better to step back and open one's
>mind for other solutions.  As I suggested before, a Hash can pretty much do
>what you want - it just doesn't give you the exact syntactic sugar you want.
>-- robert

I would normally agree. However I am right now designing the RCR.
I feel like it will have more impact if I provide
a prototype for the implementation where you can see the pros of the
proposal. The pros are more obvious if the syntax to use my prototypal
implemention is close to what it would be should the proposal be implemented
in Ruby.

Yours,

Jean-Hugues



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