Saliya's Blogs

Couple of days back I made a presentation I made to explain the concept of MapReduce simply. I have attached the slides here for anyone interested. Please note, this doesn't include animations. If you want to get a better feeling feel free to download the original version of this MapReduce presentation.

A good place to learn about .NET naming conventions.

I have been using a color theme for the command line in both Windows and Ubuntu for sometime now and it has been really comfortable for the eyes. So if you feel tired or bored using the white on black try these.

Background Color: #3A4237 (in RGB this is 58,66,55)
Text Color: White

It will give you this feeling of a good old chalk board. Here's a screen capture of how it looks.

My wife, Kalani, has started a blog to post her Sinhala poems. It's nice to see her archive of poems are finally coming up online.

I am waiting to see the poem written for me :D

I wanted to use two computers running separate OSs, yet use the same keyboard and mouse. After searching a bit I found Synergy (http://synergy2.sourceforge.net/index.html). I should say it's one of the most easy-to-use software I have ever encountered. Here are the quick steps (you can read more on their user's guide).

1. Install Synergy on both machines.
2. Setup one machine as the server.
3. Add the machines left, right, top, and bottom of the server (if any).
4. Start synergy as client on those other machines.

That's it and it's working. Only thing is that all machines should be in the same network.

One cool thing is that clipboards of all machines are shared. So copy from one machine and paste in the other is possible. Also it enables you to activate screen saver on all machines at once.

After being able to split the Eclipse windows, I felt the need to split Firefox. Luckily I came across this add-on called "Split Browser", which simply does this for you. It enables you to split tabs both horizontally and vertically. Here's a screenshot of this.

I really wanted the split view feature to be in Eclipse as with most of the other IDEs. In fact, Eclipse has this feature, but doesn't give a visible menu/tool option to do it. The simplest way is to drag the tab containing the source until you can see an arrow mark. Then it will split the view as soon as you let go of the mouse. Here's a nice video I found on how to do this.

http://addisu.taddese.com/blog/split-windowview-using-eclipse/

Here's a screenshot of how it looks.

Great! Now I can stop using mouse for the most part of browsing.

http://support.mozilla.com/en-US/kb/Keyboard+shortcuts

In Sri Lanka, I used to connect to Internet using dial-up connection before ADSL came in. Then I felt "wow! ADSL is fast". But today here in IU, I would say "WOW! what a speed". See the picture below to see why I say this.

I wanted to change the size of the icons in Windows7 desktop as they were bit larger than I like. The solution was a simple one, though I had to do some Googling to find it out.

I just wiped out my Dell Insipiron E1505 notebook and installed Windows7 Professional and Ubuntu 9.10. I had enough of the Windows XP Media Center Edition. I thought of moving to Ubuntu 9.10 as well, just feel the fun.

Unlike in the previous experience with Windows, the Windows 7 performs really well. Regarding Ubuntu, it's better than 9.04 (I was happy with 9.04 as well). The only funny thing is that I had to find drivers and manually install my ATI Raedon X1300 VGA for Windows7. Earlier I used to do this for Ubuntu installations :)

For the moment, these two OSs seems to be a great combination if you are planning to get the best of both worlds.

Pidgin was giving trouble when connecting to my Yahoo account since recently. Today I got to know that it's because of this (http://www.celticwolf.com/useful-information/faqs/26-pidgin-yahoo).

Then I wanted to install a latest version of pidgin on my Ubuntu 9.04. I tried the "how to" given in the official pidgin site (http://www.pidgin.im/download/ubuntu/), but it was unsuccessful. Then I came across these debs (http://linux.softpedia.com/progDownload/Pidgin-Download-6.html) which solved the issue.

Just a quick how-to:

1. Download the i386 (or amd 64) debs
2. Download the two DEB ALL debs
3. Use dpkg -i to install the debs. Start with libpurple-bin_2.6.3-1~getdeb1_all.deb.
Then libpurple0_2.6.3-1~getdeb1_i386.deb (or amd 64 one).
Now move ahead with pidgin-data_2.6.3-1~getdeb1_all.deb.
Next pidgin_2.6.3-1~getdeb1_i386.deb (or amd 64 one)

That's it! no more troubles with Yahoo ;)

See what has happened to the paint and you can understand the defect. Dell, you really need to think more on the paint material :)

After sweating my brain over functional programming in Prof. Daniel Friedman's class over the past several weeks, I got the chance to play with relational programming with miniKanren.

It took me some time to adjust my brain to accept the difference. Finally, I told myself

"Going to the grocer and paying for what you got is functional programming, but going to the grocer and handing over 10$ asking to give whatever that fits is logic programming"

Just a thought :)

Ever wondered what is the purpose of a weird shape hole in your laptop? I did and luckily I found this nice site (http://techplore.com/technology/know-your-connectors-ports-a-visual-guide/) with all the info I needed.

After installing Windows7 on my machine, I went on installing my usual set of software including Google Chrome. But, I wanted to test InternetExplorer 8, which is the default browser, as well. So why wait, I started using it. Wow! I have to admit that it's cooler than Chrome. Why I say this mostly because it has a nice set of customizable accelartors. Also so far it is reliable than Chrome in Windows7. Moreover, it's way better than IE 7, which I consider as a pretty bad version of IE.

My friend, Heshan, has done an interesting work to provide a framework extension to Axis2 which enables Jython based Web services and clients. Read more on his article (http://www.ibm.com/developerworks/web/library/wa-jython/)

Ever wanted to save what you type in your Scheme interpreter? I wanted :). So after a small Google search I found these nice two commands.

I've been watching Britain Got Talent (BGT) for some time now and I've never come across a performer so humble like Eugene.

Really touching video, yet happy for his courage to come forward.

I wanted to run Matlab by logging into the university account remotely from my machine. Everything went fine except for the graphics. Matlab started in no graphics mode.

After bit of a search I found the solution. You have to set the X11 forwarding in you ssh configuration file. Here's how to do it.

1. cd /etc/ssh
2. sudo vi ssh_config
3. uncomment the lines "ForwardAgent" and "ForwardX11". Set their values to "yes"
4. sudo vi sshd_config
5. uncomment "X11Forwarding" and set it value to "yes" as well.

that's it and you are good to go.

Type ssh -X username@domain

To test if everything works fine try running xclock once you log in. It should open up a graphical clock window.