Meseret Gebre » development

Mysqld_safe not starting mysql5?

mez — Fri, 04 Jun 2010 07:15:05 +0000

So I use macports to install mysql5 and when I was ready to start mysql using mysqld_safe, which is located:

/opt/local/bin/

I ended getting a big error report which said something along the lines of:

mkdir: /opt/local/var/run: No such file or directory
chown: /opt/local/var/run/mysql5: No such file or directory
chmod: /opt/local/var/run/mysql5: No such file or directory

Solution
I solved this by doing the following:

Make sure you have ran the following command after the install completes:
```
sudo /opt/local/lib/mysql5/bin/mysql_install_db  --user=mysql
```

Finally you have to do the following:

sudo mkdir /opt/local/var/run
sudo chmod g+w /opt/local/var/run/
sudo mkdir /opt/local/var/run/mysql5
sudo chown mysql /opt/local/var/run/mysql5/

Now you should be able to start mysql with no problems! A little bonus is create alias for starting and stopping mysql. My MBP is running Snow Leopard so I edit:

 ~/.profile

and add the following at the end of the file:

alias mysqlstart='sudo /opt/local/bin/mysqld_safe5 &'
alias mysqlstop='/opt/local/bin/mysqladmin5 -u root -p shutdown'

C Sharp .NET 3.0 and Beyond

mez — Sun, 18 Oct 2009 00:28:40 +0000

I have started learning everything .NET lately. Among the vast amount of information I have taken a liking to C# and the features it offers with .NET! I jumped into the .NET game at version 3.5 this means I have a lot to learn in a short span of time. I decided to concentrate on features starting from .NET 3.0 and up. I know this is super late and probably everyone knows about these features of the language, but I am going to talk about them anyways The next article will be on the following features, that make my life as a developer so much easier.

Automatic Properties
Implicitly typed local variables
Anonymous types
Object and collection initializers
Query expressions (LINQ)

I am doing this mostly as a primer/base for my next article some time in the future. This future article will be about the cool features in the up and coming C# .NET 4.0!

Python is Kick Ace

mez — Thu, 02 Apr 2009 16:20:53 +0000

Python is a scripting language that can be used in many different way. Python is super easy to learn and can take you far in the professional world. Big names like Google use this language heavily for a lot of their day to day operations. A good example is their App Engine.

I picked up Python over night just by going to the Python Home page and following their tutorials. The documentation is excellent, so if you can read, I assume you can, then you should be good to go. The tutorial I follow is located at http://docs.python.org/tutorial/index.html.

Python can be used for many things a popular usage for this scripting language is developing with Game engines, or 3D modeling software packages like Blender. Once you have gone through the tutorials, I recommend you get this pocket reference book below. It proves to be very useful, because there are so many libraries, and a quick look up can make life a lot easier.

I started learning Python when I was an undergrad to develop some code for a summer research position I had. My job was to develop an API to integrate a huge virtual environment with a 3D game engine called Panda3D. The API was called HIVE (Huge Immersive Virtual Environment). If you have any questions about Python or done anything cool with the language just leave a comment and let me know