When an Rspec example fails, I usually investigate by running that example again using rspec . However, this does not work...
While the hardware mute button of my Lenovo x230 worked on Ubuntu 14.04 out of the box, it does not...
If another session is accessing your database you are trying to reset or drop you might have seen the following...
You need to disable "Bluetooth low energy", then follow these core steps: Make sure the headphones are in pairing mode...
I frequently find myself needing a combination of group_by, count and sort for quick statistics. Here's a method...
There are many approaches out there how you can import data from a legacy application to a new application. Here...
You can not use the hash_including argument matcher with a nested hash: describe 'user' do let(:user) { {id: 1...
ActiveRecord::RecordNotFound errors provide quite meaningful error messages that can provide some insight on application details. Consider the following:
You can configure a Ubuntu system as a gateway in order to share it's internet connection (maybe via WLAN...
When using GROUP BY, MySQL now complains if the SELECT includes columns which are not part of the GROUP BY...
This card will show you how to use git rebase --onto without confusion. Use case: You've got two feature...
Assuming you're wanting to undo the effects of git rm or rm followed by git add -A or something...
Separate subject from body with a blank line Limit the subject line to 50 characters (max. 72), include...
You can use wscat: sudo apt-get install node-ws # wscat -c ws://echo.websocket.org connected (press CTRL+C to quit...
This card compares patterns to store trees in a relation database like MySQL or PostgreSQL. Implementation examples are for the...
The parallel-gem is quite easy to use and can speed up rendering time if you want to render the...
Luckily, this is simple. Just install three packages: sudo apt install ipheth-utils libimobiledevice-dev libimobiledevice-utils
Imagine the following HTML structure, where the scrolling container has overflow-y: scroll: +--scrolling container+-+ | | | +-child element+----+ | | | ++iframe++ | | | | | | | | | | | | | | +-----------------------+ | | | | <-- actually cut...
You can start vim with a read-only option. This prevents making accidentally changes in files you don't want...
If a users password for https://monitor.makandra.de/ is unknown one can set it like this: sudo python /opt/graphite/webapp/graphite/manage.py changepassword ${USERNAME...
on the bash (issued as postgres user) Start/Stop/Restart PostgreSQL pg_ctl -D $configdir start|stop|restart Start/Stop/Restart the corresponding PostgreSQL...
There seems to be a nasty bug in Chrome 56 when testing with Selenium and Capybara: Slashes are not written...
If you have a replication error with MySQL and you know the "error" is okay (e.g. you've executed the...
Like you know from "How to tell ActiveRecord how to preload associations (either JOINs or separate queries)", you can tell...