I wanted to build a suggestion engine on top of this dataset. The idea is to suggest other geeks in the StackOverflow community who have technical interests and technical expertise similar to the given user (assuming that the user has a stackoverflow account). My features are entirely based on the tags in which a particular user has participated (questions/comments/answers). While I was on my way building the tool, I thought that it might be fun to just post the top contributors for each tag.

I decided to consider the measure of contribution as the number of instances of participation. Answering, commenting and asking a question are considered as participation. I just heard you, I do have double counting in cases where there are multiple participation from the same person on a given question.

Below is the list of the top 100 tags and contributors:

You can also Download the full set of 30K  tags and contributors to review it offline

Tags	Display Name	Contribution Count	Gravatar
c#	Jon Skeet	8542
android	CommonsWare	5103
jquery	Nick Craver	4614
java	BalusC	4558
python	Alex Martelli	3639
.net	Jon Skeet	3106
php	Pekka	2935
asp.net-mvc	Darin Dimitrov	2844
sql	OMG Ponies	2263
sql-server	gbn	2232
jsf	BalusC	2081
c++	Jerry Coffin	2067
javascript	Nick Craver	2043
asp.net	Darin Dimitrov	1833
jsp	BalusC	1790
django	Daniel Roseman	1770
asp.net-mvc-3	Darin Dimitrov	1593
cocoa	Peter Hosey	1565
xslt	Dimitre Novatchev	1564
git	VonC	1561
silverlight	AnthonyWJones	1478
c	R..	1422
wcf	marc_s	1400
linq	Jon Skeet	1391
google-app-engine	Nick Johnson	1347
html	Quentin	1331
mysql	Quassnoi	1294
winforms	Hans Passant	1277
maven-2	Pascal Thivent	1236
css	thirtydot	1234
servlets	BalusC	1233
entity-framework	Ladislav Mrnka	1212
swing	camickr	1187
eclipse	VonC	1185
iphone	TechZen	1178
jqgrid	Oleg	1172
bash	Dennis Williamson	1132
hibernate	Pascal Thivent	1125
scala	Daniel C. Sobral	1105
asp.net-mvc-2	Darin Dimitrov	1104
objective-c	Dave DeLong	1079
wpf	H.B.	1057
flex	www.Flextras.com	1020
xml	Dimitre Novatchev	1003
windows-phone-7	Matt Lacey	993
regex	Tim Pietzcker	989
tsql	gbn	971
matlab	gnovice	964
perl	Sinan Ünür	956
oracle	Gary Myers	945
delphi	Mason Wheeler	872
ms-access	Remou	859
r	Dirk Eddelbuettel	830
sql-server-2005	gbn	829
nhibernate	Diego Mijelshon	811
mod-rewrite	Gumbo	800
spring	skaffman	800
core-data	TechZen	793
xpath	Dimitre Novatchev	784
jsf-2.0	BalusC	761
ruby	the Tin Man	757
f#	Tomas Petricek	750
jpa	Pascal Thivent	747
orm	Pascal Thivent	713
sql-server-2008	gbn	701
security	Rook	669
xhtml	Jitendra Vyas	658
drupal	googletorp	648
ruby-on-rails	apneadiving	646
powershell	Keith Hill	630
vb.net	Hans Passant	624
mercurial	Ry4an	615
entity-framework-4	Ladislav Mrnka	611
.htaccess	Gumbo	611
generics	Jon Skeet	609
windows-mobile	ctacke	608
visual-studio	JaredPar	603
rest	Darrel Miller	591
haskell	Don Stewart	589
shell	Dennis Williamson	585
compact-framework	ctacke	554
web-services	John Saunders	550
ruby-on-rails-3	AnApprentice	543
multithreading	Jon Skeet	540
linux	Ignacio Vazquez-Abrams	539
emacs	Trey Jackson	537
magento	clockworkgeek	510
jaxb	Blaise Doughan	499
performance	Mike Dunlavey	494
winapi	Hans Passant	493
windows	Hans Passant	486
apache	Gumbo	479
version-control	VonC	464
entity-framework-4.1	Ladislav Mrnka	457
cakephp	deceze	452
database	HLGEM	450
postgresql	Frank Heikens	449
wordpress	songdogtech	447
ajax	Darin Dimitrov	445

• According to TIm, women between the age of 18 and 35 are the most expensive group to target an advertisement to since they are most likely to purchase. If you are running low on your advertisement money and your product is gender agnostic,  targeting your ads to men is perhaps cost effective.
• Various ways of placing advertisements on facebook are creating a brand page, ad posting, and a link to an external url of which external url’s cost the most.
• Targeting your ad to a small niche is perhaps the most efficient in terms of ROI.
• A sponsored story is the lowest price option that can generate a good ROI if it has a good number of fans and likes on it.
• pay per click has been better than pay per impression.

Facebook allows you to target your ads based on people’s topic of interest, age, demographics (even zip code), employment and degree of separation from fans of your product page.

for i in `cat /etc/hosts | cut -d’ ‘ -f 2`; do echo $i; ssh $i “echo ‘import django;print django.VERSION’ | python”; done

My talk primarily focused on introducing Solr and Haystack to the SD python group. A number of attendees were already using solr in their projects and it was nice to talk about the limits we have pushed with Solr. For those interested, my presentation slides are below:

http://hackinghabits.com/wp-content/uploads/2012/03/presentation.pdf

My script:


a = []
>>> def memory_hog():
... for i in range(1000):
... a.append(a + ["what"])
>>> memory_hog()
>>> memory_hog()
.
x times
.
>>> memory_hog()


Dreamhost was pretty prompt in killing my python processes as soon as the python process hit 512MB of RAM with the following message.

“Yikes! One of your processes (python, pid 22279) was just killed for excessive resource usage.
Please contact DreamHost Support for details.”

It was depressing that Godaddy hosting services only offered python 2.4 but it does not matter for this test. On the specific Godaddy server that I was testing, there was a total of 12G of memory and I was able to easily hog memory for well over 2G and my process was not killed. I did not test my limit to see if the server goes down since python 2.4 was already not worth for me to explore more.

Webfaction claims to have a memory limit of 256MB which is quite constrained.

My hope is to use a combination of AWS and a few of these other shared hosting providers to deploy the site. Maintaining db server, memcache and lb on aws and deploying multiple webservers on shared hosting seems like a possibility.

I explored Storm-Starter which has some examples storm topologies to help get your feet wet. Most java examples worked fine for me but I got issues in running the WordCountTopology. The WordCountTopology example uses the python language to write its bolt. I kept getting the error below:

Cannot run program “python” (in directory “/tmp/cf2bf9a …

The problem was solved by adding the “multilang” directory in Storm-Starter project to the class path.

Usage:

1) Remove ‘a’ tags: Type the commands as shown in the image below in a python terminal

https://addons.mozilla.org/en-US/thunderbird/addon/linux-growl/

Screenshot: