[#14464] who uses Python or Ruby, and for what? — ellard2@...01.fas.harvard.edu (-11,3-3562,3-3076)

A while ago I posted a request for people to share their experiences

12 messages 2001/05/01

[#14555] Ruby as a Mac OS/X scripting language — Dave Thomas <Dave@...>

10 messages 2001/05/02

[#14557] Arggg Bitten by the block var scope feature!!! — Wayne Scott <wscott@...>

13 messages 2001/05/02

[#14598] Re: Arggg Bitten by the block var scope feature!!! — "Conrad Schneiker" <schneik@...>

# On Thu, 3 May 2001, Wayne Scott wrote:

9 messages 2001/05/03

[#14636] Yet another "About private methods" question — Eric Jacoboni <jacoboni@...2.fr>

I'm still trying to figure out the semantics of private methods in Ruby.

39 messages 2001/05/04
[#14656] Re: Yet another "About private methods" question — Dave Thomas <Dave@...> 2001/05/04

Eric Jacoboni <jaco@teaser.fr> writes:

[#14666] Ruby and Web Applications — "Chris Montgomery" <monty@...> 2001/05/04

Greetings from a newbie,

[#14772] Re: Ruby and Web Applications — Jim Freeze <jim@...> 2001/05/07

On Sat, 5 May 2001, Chris Montgomery wrote:

[#14710] Why's Ruby so slow in this case? — Stefan Matthias Aust <sma@3plus4.de>

Sure, Ruby, being interpreted, is slower than a compiled language.

12 messages 2001/05/05

[#14881] Class/Module Information — "John Kaurin" <jkaurin@...>

It is possible to modify the following code to produce

18 messages 2001/05/09

[#15034] Re: calling .inspect on array/hash causes core dump — ts <decoux@...>

>>>>> "A" == Andreas Riedl <viisi@chello.at> writes:

15 messages 2001/05/12

[#15198] Re: Q: GUI framework with direct drawing ca pabilities? — Steve Tuckner <SAT@...>

Would it be a good idea to develop a pure Ruby GUI framework built on top of

13 messages 2001/05/15

[#15234] Pluggable sorting - How would you do it? — "Hal E. Fulton" <hal9000@...>

Hello all,

16 messages 2001/05/16

[#15549] ColdFusion for Ruby — "Michael Dinowitz" <mdinowit@...2000.com>

I don't currently use Ruby. To tell the truth, I have no real reason to. I'd

12 messages 2001/05/22

[#15569] I like ruby-chan ... — Rob Armstrong <rob@...>

Ruby is more human(e) than Python. We already have too many animals :-).

15 messages 2001/05/23

[#15601] How to avoid spelling mistakes of variable names — ndrochak@... (Nick Drochak)

Since Ruby does not require a variable to be declared, do people find

13 messages 2001/05/23

[#15734] java based interpreter and regexes — "Wayne Blair" <wayne.blair@...>

I have been thinking about the java based ruby interpreter project, and I

48 messages 2001/05/25

[#15804] is it possible to dynamically coerce objects types in Ruby? — mirian@... (Mirian Crzig Lennox)

Greetings to all. I am a newcomer to Ruby and I am exploring the

13 messages 2001/05/27
[#15807] Re: is it possible to dynamically coerce objects types in Ruby? — matz@... (Yukihiro Matsumoto) 2001/05/27

Hi,

[#15863] Experimental "in" operator for collections — Stefan Matthias Aust <sma@3plus4.de>

There's one thing where I prefer Python over Ruby. Testing whether an

13 messages 2001/05/28

[#15925] Re: Block arguments vs method arguments — ts <decoux@...>

>>>>> "M" == Mike <mike@lepton.fr> writes:

43 messages 2001/05/29
[#16070] Re: Block arguments vs method arguments — "Hal E. Fulton" <hal9000@...> 2001/05/31

----- Original Message -----

[#16081] Re: Block arguments vs method arguments — Sean Russell <ser@...> 2001/05/31

On Thu, May 31, 2001 at 11:53:17AM +0900, Hal E. Fulton wrote:

[#16088] Re: Block arguments vs method arguments — Dan Moniz <dnm@...> 2001/05/31

At 11:01 PM 5/31/2001 +0900, Sean Russell wrote:

[#15954] new keyword idea: tryreturn, tryturn or done — Juha Pohjalainen <voidjump@...>

Hello everyone!

12 messages 2001/05/29

[ruby-talk:15748] Re: regexp

From: ts <decoux@...>
Date: 2001-05-26 09:19:01 UTC
List: ruby-talk #15748
>>>>> "L" == Leonid Razoumov <see_signature@127.0.0.1> writes:

L> Certainly it is a problem.

 I'll try to explain the rules used by ruby.

 With this regexp /(\2(a\1))/

  * at compile time

 \2 is resolved as the character \002 because 2 is greater than the number
 of '(' at this time.

 \1 is resolved as the first sub-group () (1 is less than the number of
 '('), i.e. the comment in the source is wrong.

  * at runtime, ruby use a very strange rule when it try to match \1

    \1 fail if
      - it make reference to a *valid* sub-group which is *closed*
      - the correspond string is not found

    in *all* other cases it succeed.


 This mean that in reality the regexp /(\2(a\1))/ is interpreted by ruby as 
 /(\002(a))/


 /(a)*-\1b/ succeed with 'aaa-b' because in its last case (i.e. 0
 occurences of 'a') the sub-group is *not* valid ==> success

pigeon% ruby -e 'puts "OK #$&" if /(a)*-\1b/ =~ "aaa-b"'
OK -b
pigeon% 

 Same reason for /(a)|\1/ with "b"



Guy Decoux

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