pngquant is a command-line utility and a library for converting 24/32-bit PNG images to paletted (8-bit) PNGs.
In /etc/rc.local add: service bluetooth stop
Icons Sizes for Windows, MacOS X, iOS, Android and Linux. It's a mess!
TLDR: This card explains which threads and processes interact with each other when you run a Selenium test with Capybara...
On recent/fresh installations of Ruby 1.8.7 you may encounter this error why calling any bundled binary (or just bundle exec...
If you have multiple monitors and want to share a given screen with your call partner, drag the caller window...
In Ruby, classes and modules are called constants. This card explains how Ruby resolves the meaning of a constant.
"CronMaker is a utility which helps you to build cron expressions." Check it out at http://www.cronmaker.com/.
Modern IRB has time measurement built in. measure # Enable measure :off # Disable Custom Should your version of IRB not offer...
Assert rmagick provision ... Gemfile gem 'rmagick', '2.13.2' # at this moment the latest stable version config/initializer/carrierwave.rb require 'carrierwave/processing/rmagick' ... and define a...
Use protocol independent URLs whenever possible so that the browser will choose the protocol related to the protocol which the...
Ubuntu 12.04 LTS x64, Ruby 1.8.7, Rails 2.13, PDFKit 0.5.4, Phusion Passenger Apache 2 I ran into this, when I...
I am using git at several places: at work, at university, and at home. I want an own git user/email...
Font Awesome 4 has renamed all icons. What the fuck. Check the attached link for an icon list for the...
Whenever you create a table from a database migration, remember to add updated_at and created_at timestamps to that...
Today I ran into trouble installing therubyracer on Ruby 1.8. The installation failed with *** extconf.rb failed *** Could not create Makefile...
If you need to enable NewRelic monitoring on certain machines within the same Rails environment, a simple solution is to...
Ubuntu has a package mysql-sandbox that lets you install multiple MySQL versions into your user home: Install mysql-sandbox...
It is good programming practice to Don't Repeat Yourself (or DRY). In Ruby on Rails we keep our code...
Establishing a new SSH connection usually takes only a few seconds, but if you’re connecting to a server multiple...
So you client has asked you to implement a row of buttons to like the URL on Facebook, Twitter and...
If your XFCE renders text with overly hard, thin lines instead of smooth anti-aliased lines, you might need to...
So you're switching to PostgreSQL from MySQL? Here is some help... General hints on PostgreSQL \? opens the command overview...
The mysql2 gem in version 0.3.13 might break while compiling on older patch releases of Ruby 1.9.3 within rvm: