Errors installing mysql2 on ubuntu

Upon installing the mysql2 gem I got the following error:

ERROR: Failed to build gem native extension.

I fixed it with:

sudo apt-get install libmysql-ruby libmysqlclient-dev

Thanks to this post here

Ruby - dynamically create an object :)

Thought this was really cool :)

def create_object(class_name, *args)
  the_class = Object.const_get(class_name)
  the_object = the_class.send :new, *args if !args.empty?
  the_object = the_class.send :new if args.empty?
  
  return the_object
end

Running ruby 1.9.3 on Heroku

I had a few problems trying to get ruby 1.9.3 running on Heroku.

Here's the error I had:

 Heroku receiving push
-----> Removing .DS_Store files
-----> Ruby/Sinatra app detected
-----> Gemfile detected, running Bundler version 1.0.7
       Unresolved dependencies detected; Installing...
       Using --without development:test
       /tmp/build_jpq0amd2bp92/Gemfile:5:in `evaluate': undefined method `ruby' for # (NoMethodError)

Here's what I did to fix it:

     Add the following to Gemfile: 
        ruby '1.9.3'
        gem 'bundler', '1.2.0.pre'

git remote rm heroku
heroku create --stack cedar
gem install bundler --pre
bundle install
git commit -am "fixed heroku problem"
git push heroku master

And some notes to myself for other stuff I need:

heroku addons:add mongohq:free
heroku config:add TWITTER_KEY=`echo $TWITTER_KEY`
heroku config:add TWITTER_SECRET_KEY=`echo $TWITTER_SECRET_KEY`

How to make Ethernet work on ubuntu!

So my computer has an Ethernet card which doesn't work out of the box with Ubuntu 11 or 12.04 - which means that I couldn't connect to the internet!


When I ran:


lspci | grep Ethernet 


It showed my card as having a RTL8111 Ethernet controller.


Long story short, this post helped me get the card going properly (for the second time now...)