Git: List branches on your system with time since last update

For local branches you can do this:

for k in `git branch | perl -pe 's/^..(.*?)( ->.*)?$/\1/'`; do echo -e `git show --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $k -- | head -n 1`\\t$k; done | sort -r

And to check obsolete branches in the remote repo

for k in `git branch -r | perl -pe 's/^..(.*?)( ->.*)?$/\1/'`; do echo -e `git show --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $k -- | head -n 1`\\t$k; done | sort -r

Unable to install Ruby version 2.0.0-p0 via RVM on Fedora 18

Ruby 2.0.0. version 2.0.0-p0 to be exact, was released on 24th Feb 2013 and as any Ruby programmer would do, i too tried to upgrade to Ruby 2.0.0
Fedora 18 Linux being a new OS, which too was released recently in the mid of January wasn't very helpful in the installation.

RSpec test failing when testing for parameters using "should_receive" and "with"

So, another weird and frustrating thing happened to me while i was running my app's tests using rspec.
I got 1 failing spec showing the following error:


Spec::Mocks::MockExpectationError in 'FeedsController#get_recent_feeds gets the recent feeds for live deals'

#[Feed:0x3fa7ffc8de1c @name="Feed_1001"] received :all with unexpected arguments
  expected: ({:include=>:feedable,  :order=>"updated_at desc, feedable_type desc"})
       got: ({:include=>:feedable, :order=>"updated_at desc, feedable_type desc"})

Get original urls from short urls created by services like bitly, tinyurl, twitter etc using ruby and open-uri

Pretty straight forward it is. Writing it here coz i couldn't find anything like this explained for ruby, found a lotta blogs for python though.

So i thought of explaining it here. So here goes. Sometimes we come across urls like http://bit.ly/y2uy321oy3 which can be for any website. There's this simple way to retrieve its original url.

The not so famous before_remove/before_add & after_remove/after_add callbacks.

Well, this is another rails feature and a quite nice one which is not documented properly.

While using has_many :through associations, we can use before_remove, before_add, after_remove, after_add callbacks.