In Traktor open the Controller Manager (in the Preferences window). Now press the Add Out.. button and choose Output → Beat Phase Monitor. For deck A modify the following settings:

• Note: Ch01.Note.G0
• Type of controller: LED
• Modifier Conditions are all empty
• Interaction mode: Output
• Assignment: Deck A
• Controller range min: 0
• Controller range max: 0.5
• Midi range min: 0
• Midi range max: 127
• Both Blend and Invert are off

Repeat this step for deck B, but now change Assignment to Deck B and Note to Ch01.Note.G5.

The first thing to do is create a new user.  Go to Start and click with the right mouse button on Computer and choose Manage from the submenu. In the left column choose Local Users and Groups and open the Users folder. Now create a new user (Action → New User or right mouse button → New User):

Click Create and close the window. The next thing to do is change the permission of your music folder:

1. Open Properties of your music folder
2. Open the Security tab and press the Edit button
3. In the Permissions window, choose Add
4. Enter the name of your Traktor user and press OK
5. Make sure the Traktor user is selected and in the permissions list check Deny for the Write permission

The final step is running Traktor as the newly created user. To do so go to Start and navigate to the Traktor shortcut. Now hold Shift and right click on the shortcut. Choose Run as different user and enter the Trakor user credentials. Since you start Traktor using a different user you need to reconfigure the application, but Traktor has no permission to modify your files any more.

Now startup LEd. In order to create a new paper go to File → New and on the Template tab choose Paper. In the file tree, open your .tex file. You will see something like this:

\documentclass{article}
 
\title{...}
\author{...}
\date{...}
 
\begin{document}
\maketitle
 
\section{...}
 
\section{...}
 
\end{document}

You can change the dots for anything you like and add text under the \section tags:

\section{Introduction}
Lorem ipsum dolor sit amet...

Now it’s time to compile the LaTeX document; press the green arrow button in the toolbar or F9. Press the blue arrow or F7 to create a PDF file (the file is stored in the same folder as your .tex file):

In scientific papers it’s quite common to refer to other papers. In order to manage this we use BibTeX. First create a .bib file adding a new file to the project: File → New and choose “Bibliography file in BibTeX format”. Name the file for example mybib and make sure to add it to the right project. Add the following example text to your .bib file:

@article{miles09,
 author = {Richard Miles},
 title = {Who is John Doe?},
 year = {2009},
 journal = {The Unknown Magazine},
 volume = {1},
 number = {1},
 pages = {20--42}
}

In your .tex file, add the following commands before the \end{document} tag to enable the bibliography:

\bibliographystyle{plain}
\bibliography{mybib}

Now if you want to cite something simply type \cite and a window will popup containing all the entries in your bibliography:

Lorem ipsum dolor sit amet, consectetur adipiscing elit. \cite{miles09}

Compile the bibliography file by pressing the blue book icon or F6. Then compile your LaTeX file and create a PDF. As you can see the bibliography is included in your document:

That’s all for now, for more information about the BibTeX format see this page. Enjoy LaTeX!

In order to enable sorting I first modify the get_paged_list function of the PersonModel class:

function get_paged_list($limit = 10, $offset = 0, $order_column = '', $order_type = 'asc'){
	if (empty($order_column) || empty($order_type))
		$this->db->order_by('id','asc');
	else
		$this->db->order_by($order_column, $order_type);
	return $this->db->get($this->tbl_person, $limit, $offset);
}

The index function of the person controller must be modified as well. I changed the following parts:

• Function parameters
• Get ordering from URI
• Call to model
• Table header

function index($offset = 0, $order_column = 'id', $order_type = 'asc'){
	// checks
	if (empty($offset)) $offset = 0;
	if (empty($order_column)) $order_column = 'id';
	if (empty($order_type)) $order_type = 'asc';
	//TODO: check for valid column
 
	// load data
	$persons = $this->personModel->get_paged_list($this->limit, $offset, $order_column, $order_type)->result();
 
	// generate pagination
	$this->load->library('pagination');
	$config['base_url'] = site_url('person/index/');
	$config['total_rows'] = $this->personModel->count_all();
	$config['per_page'] = $this->limit;
	$config['uri_segment'] = 3;
	$this->pagination->initialize($config);
	$data['pagination'] = $this->pagination->create_links();
 
	// generate table data
	$this->load->library('table');
	$this->table->set_empty(" ");
	$new_order = ($order_type == 'asc' ? 'desc' : 'asc');
	$this->table->set_heading(
		'No',
		anchor('person/index/'.$offset.'/name/'.$new_order, 'Name'),
		anchor('person/index/'.$offset.'/gender/'.$new_order, 'Gender'),
		anchor('person/index/'.$offset.'/dob/'.$new_order, 'Date of Birth (dd-mm-yyyy)'),
		'Actions'
	);
	$i = 0 + $offset;
	foreach ($persons as $person){
		$this->table->add_row(++$i, $person->name, strtoupper($person->gender)=='M'? 'Male':'Female', date('d-m-Y',strtotime($person->dob)),
			anchor('person/view/'.$person->id,'view',array('class'=>'view')).' '.
			anchor('person/update/'.$person->id,'update',array('class'=>'update')).' '.
			anchor('person/delete/'.$person->id,'delete',array('class'=>'delete','onclick'=>"return confirm('Are you sure want to delete this person?')"))
		);
	}
	$data['table'] = $this->table->generate();
 
	// load view
	$this->load->view('personList', $data);
}

Updated June 29th 2010 thanks to Stephen.

The only problem now is pagination doesn’t work any more. As far as I know there is no solution to pass the ordering parameter to CodeIgniter’s pagination class. I think the best solution is to implement your own pagination class. Maybe I’ll discuss that in another post.

The first step is download and install the latest version of NUnit since older versions are not compatible with .NET 4. NUnit version 2.5.5 can be downloaded here.

Now go to Tools -> External Tools:

I think this screen shot explains itself very well. Now its possible to add this external command to a tool bar. To do so go to View -> Toolbars -> Customize:

Press the New button and enter a name. Now open the Commands tab and add the external command (usually External Command 1 when you don’t have any other external commands) to the toolbar:

When clicking the NUnit button in the new toolbar the NUnit GUI starts and loads your test suite.

Watir

First download and install Ruby. If you are familiar with Eclipse, Aptana is a nice web development plugin (see this simple installation tutorial). If you don’t know how to use Ruby, Bas has a nice article about getting started with Ruby.

The second step is install Watir. You can try these examples to see what Watir does.

Testing a simple website

For one of my school projects I had to write a simple test for one of the function of this online calculator. In this tutorial we will test the GCF and LCM function. Start with creating a new Ruby script containing the right requirements and a test case class:

require 'watir'
require 'test/unit'
 
class TC_LCM_GCD < Test::Unit::TestCase
 def test_lcm_gcd
  # ...
 end
end

In order to let Watir start a new browser add the following to the test_lcm_gcd function:

Watir::Browser.default = "ie"
b = Watir::Browser.start("http://www.calcenstein.com/calc/0416.php") # GCF and LCM

If you want to use Firefox for testing, change “ie” to “firefox” and don’t forget to install the plugin. The second line starts a new browser window.

Our goal is to let Watir insert two values (the ‘First Value’ and ‘Second Value’ input field), and then press the ‘Solve’ button. In order to do so we need to know the name or id (or value in some cases) of the input fields and the ‘Solve’ button. Instead of looking at the source I can recommend to use the Firebug add-on for Firefox, and use the inspect function. The ‘First Value’ input is named ‘a’, and the ‘Second Value’ input is named ‘b’. We want to set ‘a’ to 30 and ‘b’ to 45:

b.text_field(:name, "a").set "30"
b.text_field(:name, "b").set "45"

When these values are set, Watir must press the ‘Solve’ button. It appears this button doesn’t have a name or id, so get it by value and execute the click action:

b.button(:value, "Solve").click

Now the click action is executed and the result is printed in the other two input fields (named ‘lcmA’ and ‘gcdA’). Like in all other test cases, the result must be verified. The correct result is LCM = 90 and GCF = 15, so use assertions to check the values:

assert(b.text_field(:name, "lcmA").value == "90")
assert(b.text_field(:name, "gcdA").value == "15")

This simple test case is now complete. The test output should be something like this:

Loaded suite My_test_suite
Started
.
Finished in 5.579 seconds.

1 tests, 2 assertions, 0 failures, 0 errors

Jailkit installation

First I installed Jailkit by using the following commands:

# cd /tmp
# wget http://olivier.sessink.nl/jailkit/jailkit-2.11.tar.gz
# tar -zxvf jailkit-2.11.tar.gz
# cd jailkit-2.11
# ./configure
# make
# make install

Setting up the jail

Now it’s time to set up the jail directory. Jailed users will see this directory as the root directory of the server. I chose to use /home/jail:

# mkdir /home/jail
# chown root:root /home/jail

By using the jk_init command you can set up the jail. In this tutorial the basicshell, netutils, ssh and limited shell are installed:

# jk_init -v /home/jail basicshell
# jk_init -v /home/jail netutils
# jk_init -v /home/jail ssh
# jk_init -v /home/jail jk_lsh

Add a user

Add a new user with a home directory and bash shell, and don’t forget to change the password:

# useradd -d /home/testuser -m testuser -s /bin/bash
# passwd testuser

Now it’s time to jail this user, use the following command:

# jk_jailuser -m -j /home/jail testuser

Your /etc/passwd should contain something like this now:

testuser:x:1003:1004::/home/jail/./home/testuser:/usr/sbin/jk_chrootsh

Enable bash

By using jk_cp the bash libraries are be copied to the jail:

# jk_cp -v -f /home/jail /bin/bash

Now edit the /home/jail/etc/passwd file and make sure it contains something like this:

testuser:x:1003:1004::/home/testuser:/bin/bash

Also make sure the group exists in /home/jail/etc/group:

testuser:x:1004:

Now try to login with testuser. Look for errors in /var/log/auth.log.

Maintenance

By using jk_update updates on the real system can be updated in the jail. A dry-run will show what’s going on:

# jk_update -j /home/jail -d

Without the -d argument the real update is performed. More maintenance operations can be found here.

Troubleshooting

Make sure the jailed user has a home directory in /home/jail/home. If not create one:

# mkdir -p /home/jail/home/testuser
# chown testuser:testuser /home/jail/home/testuser

References

• How to chroot ssh user using Jailkit
• Jailkit howto – ssh only shell in a chroot
• Jailkit howto – creating a regular shell in a chroot jail