[#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:

[#398043] Redefining constants for a given instance only — "Andrea Dallera" <andrea@...>

Hello,=0A=0A=C2=A0 =C2=A0 let's say we have two empty classes:=0A=0Aclass=

9 messages 2012/08/05

[#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: working with large binary strings?

From: Robert Klemme <shortcutter@...>
Date: 2012-08-02 16:29:25 UTC
List: ruby-talk #397959
On Wed, Aug 1, 2012 at 1:55 PM, bob hope <lists@ruby-forum.com> wrote:
> Hi, so in the spirit of not cluttering the forum I will ask my somewhat
> unrelated but still related question here. So I have finished
> implementing this, but have run into one issue, when I XOR strings
> together like this:
>
>   def xor_strings(string_array)
>
>     processed_strings = []
>
>     string_array.each do |string|
>       processed_strings << NArray.to_na(string, "byte")
>     end
>
>     processed_strings.inject(:^).to_s
>   end
>
> the result is not always the same size as the set of strings. I believe
> some optimization is being done for me and I need to avoid it, however
> googling for Narray and XOR has not led me to any success. I swear this
> is my last question regarding this, as after I have this fixed I am all
> the way done :D

I am really not sure what you're after, but maybe this does help:

irb(main):013:0> x = SecureRandom.random_bytes(10)
=> "\r\xC8\xA9\x99\t\f\x12\xC9#]"
irb(main):014:0> y = SecureRandom.random_bytes(10)
=> "\x12\x86p?\x19q2\xA6\e\x88"
irb(main):015:0> z = "".force_encoding 'BINARY'
=> ""
irb(main):016:0> x.each_byte.zip(y.each_byte) {|a,b| z<<(a^b)}
=> nil
irb(main):017:0> z.length
=> 10
irb(main):018:0> z
=> "\x1FN\xD9\xA6\x10} o8\xD5"

Or, for multiple strings

irb(main):020:0> z = "".force_encoding 'BINARY'
=> ""
irb(main):024:0> max = arr.map(&:bytesize).max
=> 10
irb(main):025:0> max.times {|i| z[i] = arr.inject(0) {|agg, bytes| b =
bytes[i]; b ? agg ^ b.ord : agg}.chr}
=> 10
irb(main):026:0> z
=> "\x1FN\xD9\xA6\x10} o8\xD5"

Kind regards

robert

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

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