Not too long ago I mentioned I was playing around with opencv and python. Well, in between client work I’ve moved a bit forward. Now I’m calculating the angle of a line between two tracked points relative to the horizontal.

2 responses

Eugene Niemand in Eugene Niemand’s Blog

Jul 20, 2012

SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER

How often have you received the error below?

Error

SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER. The…

Mina Ayoub

Mar 29, 2012

6 Principles of Software Design

1. Single Responsibility Principle

1 response

Zef Hemel in Zef.me

Dec 20, 2012

Node.js and The Case of the Blocked Event Loop

In [Pick Your Battles](http://zef.me/4235/pick-your-battles) I listed a few problems that we had in our production deployment of a big node.js codebase. Some people asked me to elaborate on one in particular:

1 response

Semantics3 in Engineering@Semantics3

Sep 2, 2012

How We Built Our 60-Node (Almost) Distributed Web Crawler

Web crawling is one of those tasks that is so easy in theory (well you visit some pages, figure out the outgoing links, figure out which haven’t been visited, queue them up, pop the queue, visit the page, repeat), but really hard…

1 response

Jason Shultz in Chaos Elevators

Nov 29, 2012

Fix JAVA_HOME and Intellij IDEA’s broken JDK

If you’ve ever run across this error when using IntelliJ IDEA then you may be left wondering what to do to fix it.

ERROR: cannot start IntelliJ IDEA. No JDK found to run IDEA. Please validate either IDEA_JDK, JDK_HOME or…

Jay Rogers in Server Side Up

Oct 21, 2012

Tutorial: How To Style the HTML 5 Audio Player

With the introduction of HTML 5, the audio tag provides a simple way to play audio files without the use of Adobe Flash. However, with the generic controls attribute, all audio tags look the same, but without any controls defined, the audio tag is…

Key2Market

Jan 14, 2012

What are the DDL, DML, DCL and TCL?

Data Definition Language (DDL) statements are used to define the database structure or schema. Some examples:

CREATE — to create objects in the database
ALTER — alters the structure of the database

Zef Hemel in Zef.me

Dec 19, 2012

Message Queue-Based Load Balancing

When you run a big mission critical web app, you have to two big challenges on the operational side:

1. Handling _failure_ — failure is all around: servers fail, processes crash, datacenters blow up.
2. _Scaling_ as traffic increases and…

These were the top 10 stories tagged with Programming in 2012. You can also dive into monthly archives for 2012 by using the calendar at the top of this page.