Xfce gives you a million options to configure your panels. Together with Xfce's sometimes arcane configuration UI, this can be a huge time waster and super-annoying if you need to get work done the same day.
This card describes how to setup a classic panel layout as you might be used to from Gnome 2 or Windows (see screenshot below). You can use this to quickly get productive in Xfce, and as a starting point for further customization.
If you tried out Compiz on top of Xfce and found it to be a world of pain like me, you can get to Xfce's native window manager by saying:
If you don't want to mess around with arcane incantations inside
xorg.conf, you can use the graphical
sudo apt-get install arandr arandr
If all your monitors are stacked in the same space, the space is not wide enough and you can't really move them, you need to switch to a proprietary driver. If it works with the open source driver for you, do not bother using another one.
amdcccle; if the binary is unavail…
If you have a PNG and want to know a pixel's alpha channel value, you can use Gimp:
Shiftkey while clicking the pixel
A window will appear, containing color information, including the alpha channel.
Freetile is a plugin for jQuery that enables the organization of webpage content in an efficient, dynamic and responsive layout. It can be applied to a container element and it will attempt to arrange it's children in a layout that makes optimal use of screen space, by "packing" them in a tight arrangement
The gem author Jonas Nicklas highlights in a Google Groups post that the release
spec/feature/...folder) and the
:typemetadata has been changed from
Global keyboard shortcuts can be configured in two separate panels in the Xfce Settings manager:
If you can now longer hear or record sounds after upgrading Ubuntu, you probably need to re-tell Ubuntu which devices to use for playback/recording.
pavucontrol). If you don't have that application, install it with
sudo apt-get install pavucontrol.
This may be configured for you by default.
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.
I am talking about development speed. When your application starts growing and you start adding gems, it starts to take really long to start up, be it the server, console or just running a single spec.
Zeus is smart, you don’t have to put it in your Gemfile or run it with Bundler, all you need to do is create a JSON config file via
zeus initand then start the server
After that, you’re ready to go, all you need to do is prefix every command with zeus. That means
zeus server, `rails console…
The very useful andand gem does not play very nice with Ruby's SimpleDelegator (or vice versa).
This following will not work:
class MyDecorator < SimpleDelegator def foo end end MyDecorator.new(Object.new).andand.foo
The reasons are a bit subtle, basically SimpleDelegator will "force" some methods to be delegated, so the
andand method is called on the wrapped object, not the delegator.
You can fix it like this:
class Decorator < SimpleDelegator def an...
When your file manager sorts file case-sensitively after a distribution upgrade, you probably need to reconfigure your locale settings as described here.
So you have multiple screens under Xfce and want to have one task bar on each screen, only showing applications on that screen. Here you go:
In Rails 2, when calling
instance_exec on a scope, the scope will fetch its records from the database.
This has been fixed in Rails 3+.
imgAreaSelect is a jQuery plugin for selecting a rectangular area of an image. It allows web developers to easily implement image cropping functionality, as well as other user interface features, such as photo notes (like those on Flickr).
As the title says: this jQuery plugin creates bar charts from HTML tables. It comes in some different flavors.
Check the examples page: http://alphagov.github.com/magna-charta/.
A technique to vastly reduce the number of join model records that need to be stored in the database.
The technique is only effective when there is a high redundancy in your data, e.g. combinations of the same 20 tags are used to label thousands of books.
The technique is also limited in that your join models cannot have additional logic, such as attributes or callbacks.
Ther has-many-with-set gem is an implementation of this technique.