[#396148] Facebook Group — Moses Aronov <mosesaro@...>

There is a facebook group that was recently created so we could all communicate with other fellow developers

13 messages 2012/06/05
[#396178] Re: Facebook Group — Chad Perrin <code@...> 2012/06/06

On Wed, Jun 06, 2012 at 01:55:48AM +0900, Moses Aronov wrote:

[#396186] Inexplicable Argument Error — Doug Jolley <lists@...>

I am encountering a very strange argument error. I simplified my code

12 messages 2012/06/06

[#396229] Thread#kill is not rescued by "rescue Exception" — Iñaki Baz Castillo <ibc@...>

Hi, let me show this easy code:

13 messages 2012/06/07

[#396333] Is "a,b=c,d" atomic? or do I need a Mutex? — Iñaki Baz Castillo <ibc@...>

Hi, I have two methods that could be called by different threads and

10 messages 2012/06/10

[#396357] ffi - Popping image on top of the screen — "Damián M. González" <lists@...>

Ey guys, how are you? I`m developing an application in Ruby, using

12 messages 2012/06/11

[#396373] Why should I learn ruby? — Kasper Steensig <lists@...>

I have wondered whether I should learn ruby or python hence they are

16 messages 2012/06/11

[#396503] Syntax Highlighter — Intransition <transfire@...>

Would you agree that Ruby shouldn't lack for a syntax highlighting library

18 messages 2012/06/14

[#396589] Unsubcripe — Suresh Rajkumar <sureshrajchennai@...>

Unsubcipe my mail address from the group.

13 messages 2012/06/18

[#396615] Symbols and Strings... — Hal Fulton <rubyhacker@...>

Hello, all...

29 messages 2012/06/18
[#396620] Re: Symbols and Strings... — Eric Hodel <drbrain@...7.net> 2012/06/18

On Jun 18, 2012, at 15:09, Hal Fulton wrote:

[#396641] Re: Symbols and Strings... — Robert Klemme <shortcutter@...> 2012/06/19

On Tue, Jun 19, 2012 at 12:31 AM, Eric Hodel <drbrain@segment7.net> wrote:

[#396643] Re: Symbols and Strings... — Hal Fulton <rubyhacker@...> 2012/06/19

Personally, I don't have a problem with "reducing the contract"

[#396646] Re: Symbols and Strings... — Robert Klemme <shortcutter@...> 2012/06/19

On Tue, Jun 19, 2012 at 5:17 PM, Hal Fulton <rubyhacker@gmail.com> wrote:

[#396659] Re: Symbols and Strings... — Hal Fulton <rubyhacker@...> 2012/06/19

> > Freezing an object also reduces its contract.

[#396678] Re: Symbols and Strings... — Robert Klemme <shortcutter@...> 2012/06/20

On Tue, Jun 19, 2012 at 10:12 PM, Hal Fulton <rubyhacker@gmail.com> wrote:

[#396701] Re: Symbols and Strings... — Henry Maddocks <hmaddocks@...> 2012/06/20

[#396702] Re: Symbols and Strings... — Bartosz Dziewoński <matma.rex@...> 2012/06/20

2012/6/20 Henry Maddocks <hmaddocks@me.com>:

[#396703] Re: Symbols and Strings... — Henry Maddocks <hmaddocks@...> 2012/06/20

[#396710] Re: Symbols and Strings... — Jeremy Bopp <jeremy@...> 2012/06/20

On 06/20/2012 03:58 PM, Henry Maddocks wrote:

[#396627] Does ERB have recursive template support? — Todd Wei <lists@...>

I want to use ERB template library to do some code generation. It

10 messages 2012/06/19

[#396649] Looking for a better way to add a method to a core class than monkey patching — Iain Barnett <iainspeed@...>

Hi all,

17 messages 2012/06/19
[#396670] Re: Looking for a better way to add a method to a core class than monkey patching — Avdi Grimm <groups@...> 2012/06/20

Please do not monkey patch core libraries in gems, unless the *purpose* of

[#396685] Benchmark obsession? — "Jan E." <lists@...>

Hi,

23 messages 2012/06/20
[#396709] Re: Benchmark obsession? — Ryan Davis <ryand-ruby@...> 2012/06/20

[#396815] Array#sample is Set#sample and not Array#sample ! — Michel Demazure <lists@...>

Arrays are ordered, sets are not. Sampling an array should give random

11 messages 2012/06/25

[#396877] CSV.open problem, help please — Kaye Ng <lists@...>

This code doesn't seem to work

21 messages 2012/06/27

[#396896] Copying text from MS Word and wrapping in HTML - help please — Adam Holloway <lists@...>

Hi,

11 messages 2012/06/27

[#396966] Interactions between 'new' and 'initialize' ? — Cees Zeelenberg <lists@...>

In JRuby, I am extending an existing Java Class with a Ruby initialising

9 messages 2012/06/28

[#396975] stack level too deep for quicksort code — bei zhao <lists@...>

Hi, below is my quicksort implementation in ruby(using the first element

12 messages 2012/06/28

[#396996] Accessor Methods with a Twist — Doug Jolley <lists@...>

I am surprised that the code shown below returns, 'Doug'. I would

15 messages 2012/06/29

[#397001] ruby performance — anaray anaray <lists@...>

Hi,

33 messages 2012/06/29
[#397007] Re: ruby performance — Bartosz Dziewoński <matma.rex@...> 2012/06/29

The MRI is, unfortunately, slow as balls, and there's not much you can

[#397008] Re: ruby performance — Hans Mackowiak <lists@...> 2012/06/29

Bartosz Dziewoナгki wrote in post #1066673:

[#397010] Re: ruby performance — Bartosz Dziewoński <matma.rex@...> 2012/06/29

2012/6/29 Hans Mackowiak <lists@ruby-forum.com>:

[#397011] Re: ruby performance — Bartosz Dziewoński <matma.rex@...> 2012/06/29

2012/6/29 Hans Mackowiak <lists@ruby-forum.com>:

[#397047] Re: ruby performance — "Andreas S." <lists@...> 2012/07/01

Bartosz Dziewoński wrote in post #1066681:

[#397048] Re: ruby performance — Bartosz Dziewoński <matma.rex@...> 2012/07/01

2012/7/1 Andreas S. <lists@ruby-forum.com>:

[#397068] Re: ruby performance — Robert Klemme <shortcutter@...> 2012/07/02

On Sun, Jul 1, 2012 at 1:42 PM, Bartosz Dziewoナгki <matma.rex@gmail.com> wrote:

[#397086] Re: ruby performance — Dan Connelly <lists@...> 2012/07/02

Here's my contribution:

Re: Problem with reg exp

From: Matthew Kerwin <matthew@...>
Date: 2012-06-13 04:21:06 UTC
List: ruby-talk #396425
Sorry, I realise I should have probably given some code to exemplify
what's in my head:

  str1 = "ABC12A2012"
  if str1 =~ /^([a-zA-Z]+)(.*?)(?:KEYWORD)?$/
    p $1, $2 # => "ABC", "12A2012"
  end

  str2 = "ABC13B2012KEYWORD"
  if str2 =~ /^([a-zA-Z]+)(.*?)(?:KEYWORD)?$/
    p $1, $2 # => "ABC", "13B2013"
  end

To get it to work I:
* made a non-capturing group, using the (?: ... ) syntax, so the
entire string 'KEYWORD' can be marked as optional.
* made the middle _anything_ matcher (.*) non-greedy (so it doesn't
automatically also capture a trailing KEYWORD) by appending a question
mark
* tacked a $ end-of-string marker after the optional KEYWORD thing, to
ensure that the non-greedy _anything_ matcher actually matches;
otherwise it seems quite happy to match ""
* also put a ^ start-of-string marker, since my if-statement is
simultaneously validating the string as well as extracting the match.
It doesn't really do anything, you can leave it out.

You could also wrap the non-capturing keyword group in capturing
parens if you want to extract the keyword, thus:

  str1 = "ABC12A2012"
  if str1 =~ /^([a-zA-Z]+)(.*?)((?:KEYWORD)?)$/
    p $1, $2, $3 # => "ABC", "12A2012", ""
  end

  str2 = "ABC13B2012KEYWORD"
  if str2 =~ /^([a-zA-Z]+)(.*?)((?:KEYWORD)?)$/
    p $1, $2, $3 # => "ABC", "13B2013", "KEYWORD"
  end

If you don't like using the if-statement structure, you can also use
String#match , which returns a MatchData object. You can access the
groups using array syntax:

  str1 = "ABC12A2012"
  md = str1.match /^([a-zA-Z]+)(.*?)((?:KEYWORD)?)$/
  p md[1] => "ABC"
  p md[2] => "12A2012"

etc.

String#split , on the other hand, breaks the string up by chopping out
any parts of the string that match the regexp, and returning the
remaining chunks as an array.  For example:

  str2.split /[0-9]+/  # => ["ABC", "B", "KEYWORD"]

That is, it chops out the numbers, and returns the bits in between.

I'd have to think a lot harder about how you're getting what you're
getting with str2, but I'm already pretty sure the actual question can
be resolved using =~ or String#match

On 13 June 2012 11:30, cyber c. <lists@ruby-forum.com> wrote:
> Hi,
>
> I need to match
>
> str1 = "ABC12A2012"
> str2 = "ABC13B2013KEYWORD"
>
> i have to extract,
> word1 = ABC, word2 = 12A2012 for str1
> word1 = ABC, word2 = 13B2013 for str2
>
> i have used
> str.split(/([a-zA-Z]+)(.*)(KEYWORD?)/)
>
> for str2 i get substrings as
> "","ABC","12A2012","KEYWORD" -- hy did the nil sub string popped up?
>
> for str1 i get only 1 substring which is the entire string
>
> Any one can spot the problem , please let me know.
>
> --
> Posted via http://www.ruby-forum.com/.
>



-- 
Matthew Kerwin, B.Sc (CompSci) (Hons)
http://matthew.kerwin.net.au/
ABN: 59-013-727-651

"You'll never find a programming language that frees
you from the burden of clarifying your ideas." - xkcd

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