Systemd's networkd will drop IP-Addresses configured by other processes like Keepalived's VRRP, when it is restarted. This...
There is a new card about how to do this with the new AWS Command Line Interface
This should be fixed in the latest LTS-branches of our mysql2 fork, 0.2.x-lts and 0.3.x-lts...
...ES5. This means that examples for transpiled results or the "Try CoffeeScript" web console behave differently, and lookup up stuff when working on older projects may be somewhat hard.
All browsers + IE9 know the CSS :empty selector. It lets you hide an element when it has no content, i.e...
Promises are the new way™ to express "Do this, and once you're done, do that". In contrast to callbacks...
If you want to know your public key's fingerprint, do this: ssh-keygen -lf ~/.ssh/my.key.pub This may be necessary...
When writing Rails migrations to convert a string column to an integer you'd usually say: change_column :table_name...
Starting with Ruby 2.0 you can define methods with keyword arguments. In 2.1+ required keyword arguments can be defined by...
When you make a simple TCP connection to a remote server (like telnet), your client won't normally notice when...
...you're using Rails 4 (which brings String#indent in ActiveSupport), you'll be best of defining it yourself. This card has it for you. Gems that define String#indent...
We often use VCR to stub external APIs. Unfortunately VCR can have problems matching requests to recorded cassettes, and these...
...as separate commits or branches. After the review with mentor you can keep the best version and delete the others. Asking for help You're working in a team of...
...its internal state. It is usually sufficient to use the then() function. Where promiseState() becomes useful is when writing unit tests for a function that returns a promise.
MariaDB (and MySQL) is released in different versions with different behaviors. For backwards compatibility this can be managed with the sql_mode option. Following you can find behavior differences which...
Many of our developers love to use the "awesome" window manager on Linux. However, RubyMine dialogs occasionally defocus while typing...
...no longer executed. Both are caused by the return inside of the block. This behavior is by design, just so that you can break out of a block -- and you...
...buffer { return block.call(*args) } end end This can come bite you with extremely unexpected behavior of your application, as this will mean a slightly different result of your capture:
When you have files in your .gitignore they won't be considered for changes, but still you might want to...
...your code a good manner, it can affect readability in a terrible way. The better option is to bundle your local font into an npm package and to add a...
On application servers, gems are usually bundled into the project directory, at a location shared across deployments. This is usually...
You set a flash message and it shows up as it should. However, it is displayed again the next time...
...supports standard Hash.new forms There's also a Concurrent::Cache class that sort of behaves like an unordered Hash, but is much faster. Info If you're using Rails you...
Add deprecation warnings and their solution or link to available solutions. Global access to Rake DSL methods is deprecated. Please...
Geordi is now (partially) tested with Cucumber. Yay! geordi cucumber supports a new @solo tag. Scenarios tagged with @solo...