Change the hostname on Mac OS X
To set the hostname of your Mac, run the following command in Terminal:
sudo scutil --set HostName my-new-hostname.local
Check it by typing:
hostname
Related cards:
How to move a window to the next monitor on Xfce, Mate and other X Window Managers
Since I use this a lot in my daily work and there were no scripts working properly for me, I made one myself.
It's actually not bound to Xfce but should work on any window manager (haven't tried it, though).
Installation
- If you don't yet ...
Rails: Custom validator for "only one of these" (XOR) presence validation
For Rails models where only one of multiple attributes may be filled out at the same time, there is no built-in validation.
I've seen different solutions in the wild, each with different downsides:
- Private method referenced via
validate: wor...
How to type brackets, braces, pipe, backslash, or at sign on OSX
On OSX (real or inside Browserstack), you need different keystrokes for your favorite special characters than you'd use on Linux or Windows.
| Character | OSX Keystroke |
|---|---|
[ |
Alt+5 ... |
How to change the mouse pointer in Xfce
Unlike in Gnome, there is no graphical tool to set a mouse cursor in Xfce. Run this on a terminal instead:
sudo update-alternatives --config x-cursor-theme
You need to sign out and back in for your changes to have an effect.
How to: Upgrade CarrierWave to 3.x
While upgrading CarrierWave from version 0.11.x to 3.x, we encountered some very nasty fails. Below are the basic changes you need to perform and some behavior you may eventually run into when upgrading your application. This aims to save you some...
How to set the default monospace font on Xfce (Xubuntu)
While you can set your own font in your terminal or other tools, it will not change the default "Monospace" font that some applications use.
To change that, edit ~/.fonts.conf and add settings for the "m...
Lightning Talk: Coverage based Test Case Prioritization in Ruby on Rails
For my computer science bachelor's thesis I programmed and evaluated a CLI Test Case Prioritization (TCP) tool for makandra. It has been written as a Ruby Gem and was tested and evaluated against one Ruby on Rails project....
Change the name of your Ubuntu machine
In order to rename your Ubuntu box, replace all occurences of the the old name in the following two files:
/etc/hostname/etc/hosts
After a reboot your hostname is changed. If you don't want to reboot your Ubuntu box you have to execute ...
Installing therubyracer and libv8 with Ruby 1.8 on OSX Mavericks
There seems to be no way to use therubyracer -v '0.11.4' and libv8 -v '3.11.8.17' on OS X Mavericks.
However, running bundle update therubyracer worked for me. It installed therubyracer -v '0.12.1' and libv8 -v '3.16.14.3' and I had not...
The JavaScript Object Model: A deep dive into prototypes and properties
Speaker today is Henning Koch, Head of Development at makandra.
This talk will be in German with English slides.
Introduction
As web developers we work with JavaScript every day, even when our backend code uses anothe...