[#397988] Help with sqlite3 please — Kaye Ng <lists@...>

I'm on Windows 7 Ultimate, 64-bit

18 messages 2012/08/03
[#397989] Re: Help with sqlite3 please — Chris Hulan <chris.hulan@...> 2012/08/03

sqlite is not ruby, so you should look for a sqlite group ;)

[#397990] Re: Help with sqlite3 please — Kaye Ng <lists@...> 2012/08/03

> However it looks like you have 'SQL' at the beginning of your CREATE

[#398031] Gem install or usage problem in shared environment — Tom Moulton <lists@...>

I am moving to a Westhost shared CPanel account and I am trying to set

17 messages 2012/08/04
[#398077] Re: Gem install or usage problem in shared environment — Tom Moulton <lists@...> 2012/08/06

I got a solution from WestHost and it may help others:

[#398086] Re: Gem install or usage problem in shared environment — Ryan Davis <ryand-ruby@...> 2012/08/07

[#398088] Re: Gem install or usage problem in shared environment — Tom Moulton <lists@...> 2012/08/07

Ryan Davis wrote in post #1071503:

[#398063] Join with ActiveRecord using non-standard schema — Tedi Roca <lists@...>

Hi,

13 messages 2012/08/06

[#398135] Help with database-related code pls — Kaye Ng <lists@...>

Hi guys! This is just a part of the code of a program that can load a

12 messages 2012/08/08

[#398190] How do you order your class methods? — masta Blasta <lists@...>

Just getting some layout ideas from other fellow devs.

11 messages 2012/08/10

[#398245] namespace instance methods? — John Doe <lists@...>

I have a large class with many instance methods that I want to

14 messages 2012/08/13

[#398287] Idea: def ... end returns the symbolized version of the newly-defined method, instead of nil — Peter <lumbergh@...>

This would allow useful syntax constructs such as this:

9 messages 2012/08/13

[#398362] case vs if-else — ajay paswan <lists@...>

Which one is faster?

20 messages 2012/08/16

[#398385] A Ruby class is never closed — Rubyist Rohit <lists@...>

Is it true that a Ruby class definition is never closed? Even after

18 messages 2012/08/16

[#398504] How to create an EXecutable file (Linux) — Fosiul Alam <lists@...>

Hi

13 messages 2012/08/22

[#398506] Save a file by clicking on a link — ajay paswan <lists@...>

I clicked a link to download a file using ruby, now I see the open-save

41 messages 2012/08/22

[#398641] force child threads run paralelly? — ajay paswan <lists@...>

I have created two child thread using main thread- child1 and child2.

19 messages 2012/08/28
[#398644] Re: force child threads run paralelly? — ajay paswan <lists@...> 2012/08/28

Ruby version:

[#398648] Re: force child threads run paralelly? — Tony Arcieri <tony.arcieri@...> 2012/08/28

On Tue, Aug 28, 2012 at 7:19 AM, ajay paswan <lists@ruby-forum.com> wrote:

[#398684] Can I do this with Ruby and sqlite alone? — Kaye Ng <lists@...>

Hi guys.

16 messages 2012/08/29

Re: Delete a lines from a files

From: Robert Klemme <shortcutter@...>
Date: 2012-08-12 18:02:14 UTC
List: ruby-talk #398236
On Sun, Aug 12, 2012 at 7:49 PM, Admin Tensor <lists@ruby-forum.com> wrote:
> Robert Klemme wrote in post #1072081:
>> If you really only need to delete a single line from a file sed is
>> probably the easiest choice:
>>
>> without backup
>> $ sed -i '/^john/ d' your_file
>>
>> with backup
>> $ sed -i.bak '/^john/ d' your_file

> I think because this discussion is about Ruby and the OP may or may not
> have access to sed, we can follow Dave Thomas' way on the command line:
>
> ruby -e 'BEGIN{$/=nil}; puts STDIN.readlines.to_s.gsub(/^john.*$/, "")'
> < your_file

Why do you set the input record separator to nil?  How then should
readlines work?  Also, I hope you are aware that readlines will read
in the whole input before outputting anything.  This is quite
inefficient for medium to large files.   ARGF might be better, too.

> I haven't tried the code myself yet, so it has to be taken with a grain
> of salt; and as written, it only outputs to stdout.

Well, there is a Ruby solution closer to sed solution I posted earlier:

# without backup
$ ruby19 -i -ne 'puts $_ unless /^john/' your_file

# with backup
$ ruby19 -i.bak -ne 'puts $_ unless /^john/' your_file

Kind regards

robert

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

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