SELECT pg_size_pretty(pg_database_size('some-database')); Example SELECT pg_size_pretty(pg_database_size('cards_p')); ----------------

While working on a Rails application, your code base will grow a collection of different file types including: Ruby (business...

Ruby includes many standard gems that are bundled into the Ruby installation. Here is an example for the gem strscan...

Based on the Ruby Basics Card in the developer Curriculum Ruby is the programming language we use on the backend...

In case you have trouble with the zeitwerk autoloader, you can check out the documentation Autoloading and Reloading Constants and...

Instead of using Puppet exported resources you can use the puppetdb_query feature. This can result in more complex code...

How can I configure virtual IP's? There are two parameter to set up virtual ips in Keepalived: virtual_ipaddress...

tl;dr Since Rails 6.1+ you can use .compact_blank or .compact_blank! to remove blank values from collections (e.g...

When paginating records, we usually need to know the number of total records in order to render pagination links. Popular...

You can use the code below to check whether the browser can make connections to the current site: await isOnline...

Somewhat regularly, you will need to filter a list down to some items and then map them to another value...

I recently wanted to add a model for address information but also wanted to add a unique index to those...

When changing code in mailers, updating the corresponding mailer preview can be forgotten very easily. Mailer previews can be tested...

Recent IRB versions include a multi-line autocomplete which may be helpful to novice users but can be distracting.

It might sometimes be useful to check whether your Rails application accesses the file system unnecessarily, for example if your...

Testing file download links in an end-to-end test can be painful, especially with Selenium. The attached download_helpers.rb provides...

If you get an error message like this: You have already activated some-gem 1.2.3, but your Gemfile requires some...

While verifying doubles in RSpec is a good default, it is limited in the amount of methods it actually is...

I recently had the problem that embedded code boxes crashed my layout. It turned out that pres break out of...

tl;dr With ES2021 you now can use str.replaceAll(), Promise.any(), logical assignment operators, numeric separators and WeakRef on all major...

Code quality can be measured in four levels: (Working code) Reliable code (minimum) Readable code (ok for short-lived code...

There is a way to use multiple databases in Rails. You may have asked yourself how you're able to...

tl;dr You can use attribute? as shorthanded version of attribute.present?, except for numeric attributes and associations. Technical Details