To get a quick overview of database table sizes, you can view the row count like this: # PostgreSQL SELECT schemaname...
Applications often show or hide elements based on viewport dimensions, or may have components that behave differently (like mobile vs...
Checking if a JavaScript value is of a given type can be very confusing: There are two operators typeof and...
validates_uniqueness_of is not sufficient to ensure the uniqueness of a value. The reason for this is that in...
Whenever you create a table from a database migration, remember to add updated_at and created_at timestamps to that...
This release makes it easier to migrate to a recent version of Unpoly when your app still depends on jQuery...
Use the compile function to change the original DOM (template element) before AngularJS creates an instance of it and before...
When you have a string containing umlauts which don't behave as expected (are not matched with a regexp, can...
There are many approaches out there how you can import data from a legacy application to a new application. Here...
Selenium cannot reliably control a browser when its window is not in focus, or when you accidentally interact with the...
Git allows you to do a binary search across commits to hunt down the commit that introduced a bug.
An alternative to this technique is using VCR. VCR allows you to record and replay real HTTP responses, saving you...
Rails is split into a large number of (sub-) frameworks. The most important and central of those are activesupport (extends...
MariaDB (and MySQL) is released in different versions with different behaviors. For backwards compatibility this can be managed with the...
When working with ActiveType you will often find it useful to cast an ActiveRecord instance to its extended ActiveType::Record...
When localizing model attributes via I18n you may run into errors like this: I18n::InvalidPluralizationData: translation data {...
...} can not be...
There are three ways to define your own RSpec matchers, with increasing complexibility and options: 1) Use RSpec::Matchers.define
You can share a state in Ruby with global variables. Even if you should avoid them whenever possible, for debugging...