Programming Theory

Best practices, structuring of code, dissecting algorithms and talking about the “Why?”

Reflective N-bit Binary Gray Code Using Ruby

So what is behind the theory of binary gray code? It was named after Frank Gray and is a numerical system where each successive value differs from the one before it by one bit value. It is like counting in binary, but in binary counting a step may require changing two bits. For instance going from 1 (01) to 2 (10) would involve changing the most significant value 1 ...

Intersection of LinkedLists Using Java

Yesterday a user came through the Java forum looking for help with finding the intersection of two LinkedList sets. If you were anything like I was in school, you probably had a flash back to math class and the teacher drawing Venn Diagrams up on the white board. Two circles, usually representing two sets of elements, and where they overlapped was elements shared between the sets. Maybe they even drew ...

Histogram Equalization Using PHP

The other day someone on the board had asked about histogram equalization and it had sparked some thoughts about how it is applied to picture correction and enhancement. Then of course it hit me like a ton of bricks (ouch!), why not make this into a blog post? So here I am telling all you fine people about using PHP to equalize the histogram information in pictures. Now we all ...

Slot Machine Example in C++

I was bored and that can be a dangerous thing. Like doodling on the phone book while you are talking on the phone, I doodle code while answering questions on DIC. Yeah, it means I have no life and yes it means I was born a coder. During this little doodle I decided to make a slot machine. But not your standard slot machine per say, but one designed a ...

Bit.ly Class for shortening URLs in VB.NET and C#

So I was tinkering around with some code and thought "Hey, wouldn't it be great to create a class that could be used to tie into bit.ly's API for shortening URLs?" After having this thought I also thought "I am hungry" so went to get some lunch. Then when I came back, I got to work putting together a quick class that a programmer could use in their projects for ...

Reading and Updating an Access Database in C#

Almost on a daily basis we run across posts that ask about using a .NET language to read and update a database. Oh it might have a slight variation like "How do I load a value from a database into a textbox?" or "How do I read a database into _______ control and then update the database?" So I figured I would put a few little snippets here to show ...