[#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=C5=84ski 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 Dziewo=C5=84ski 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=C5=84ski <matma.rex@gmail.co=

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

Here's my contribution:

Re: Read from several .txt files by a pattern and write the matched lines to a new file

From: Robert Klemme <shortcutter@...>
Date: 2012-06-04 15:04:34 UTC
List: ruby-talk #396133
On Mon, Jun 4, 2012 at 3:32 PM, Robert Hansen <lists@ruby-forum.com> wrote:
> $files =3D Array.new
>
> Dir.glob("**/Msg.log").entries.each { |n| $files.push(n) if
> File.file?(n) }
> puts "\n#{$files.size} files found\n"
>
> pattern =3D /(failed)/m
>
> $files.each do |element|
> =A0 =A0 =A0 =A0 f =3D File.open(element, 'r')
> =A0 =A0 =A0 =A0 =A0 =A0 =A0lines =3D f.readlines
> =A0 =A0 =A0 =A0 =A0 =A0 =A0lines.each do |line|
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0if line.match(pattern)
> =A0 =A0 =A0 =A0 =A0 =A0 File.open('newfile.txt', 'w') do |write| =A0<-- P=
roblem
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 write.puts(line)
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0end
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 end
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 end
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 f.close
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0end
>
> My problem is where the "if statement" begins. I am sorry to say that my
> compiler does not give me any error message, but the "newfile.txt" will
> not be created and therefore not written to. This makes no sense to me
> since I am a new beginner at Programming/scripting

You open and close the file all the time with 'w' which means 'open
for writing, truncate'.  This will lead to an empty file as you
notice.  You should open it only once because that is more efficient.
You could also replace 'w' with 'a' (append) but as I said, that is
far less efficient.

> As for your code,
>
> "$ find . -type f -name Msg.log -exec fgrep failed {} + >newfile.txt"
>
> looks pretty and neat, but I am afraid it is way over my head.

:-) Standard shell tools.

"find ." - finds in the directory hierarchy rooted at the current dir
"-type f" selects files
"name Msg.log" selects all items with name "Msg.log"
"-exec ... {} +" executed the given command with multiple file names
"fgrep failed" selects lines which contain the literal string "failed"
">newfile.txt" redirects output to the given file.

Kind regards

robert

--=20
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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