Blog Insights
Spring Roo Sample App Tutorial
In this blog, I will start creating a web application used to organize bookmarks. Because only certain bookmarks are of interest to specific groups of people, I will use groups in our LDAP server to control which users see which groups of bookmarks. The entire blog will be released in posts...
Continuous Learning and Career Development Goals
Continuous learning is a critical puzzle piece to staying competitive in today’s business world. In the IT world specifically, as we all know, the only constant is the fact that processes are changing and new processes are evolving all the time! In order to keep up with the learning curve, we must...Building Multi-Criteria Search Queries in Hibernate
In this post I am going to show how to write queries multi-criteria search screens. There are two approaches for making this possible. Here I am going to show 2 approaches to building the HQL and try to point out the better approach. Approach I:String concatenation This approach uses String concatenation and setting...Word Counts Example in Ruby and Scala
A while ago I was asked, as a pre-interview task for another company, to write some code in any language that counted word frequencies in these newsgroup articles. I recently came across the Ruby and Scala scripts I wrote and thought it would be fun to post them. First, here is...
Windows Black Screen Of Death
It seems the Black Screen of Death has struck again. Microsoft isn't confirming or denying that the issue was caused by a Microsoft update, but this issue is not new to Windows users. It affects all breeds of Windows OS, after logging in the screen goes black. Some users are...Vim splits, an introduction.
First off, lets get some test files: for i in foo bar cat dog ; do echo $i > $i ; done; This creates 4 files named foo, bar, cat and dog. Each file has a single line that contains the file's own name. Let's open the first file: vim foo This would be the...Success!
While searching through quotes to include in our company newsletter, I came across this: Read that again... The mind is a very powerful thing. For example, I don’t believe I’m the only one to experience being in a store next to a visibly sick individual and after they sneeze I start to...PL/SQL Variables and Connection Pooling
I recently had to implement a common feature across multiple applications and app servers, all of which point to the same Oracle database. For reasons unrelated, I chose to implement this feature using PL/SQL. You can all stop laughing now. I ended up with something resembling: create or replace package body...Monte-Carlo Localization in a Nutshell
If you're a nerd like most of us here at Source Allies, you probably think robots are cool. One of the most important part of robotics is teaching the robot to find its location on a geographic map - a process known as "localization." One such algorithm for solving this...