Yesterday I stumbled across a talk in which the guy mentioned module sub-classing. I was curious what you can...

A haml angular 1 template with .thing(class="is-{{:: item.type }}") will be compiled (by haml) to which is not what...

In order to have monitoring for Sidekiq (like queue sizes, last run of Sidekiq) your application should have a monitoring...

Closure_tree lets your ActiveRecord models act as nodes in a tree data structure. This promises a few improvements over...

Instantiating ActiveRecord objects comes expensive. To speed up things, you can choose a more direct way to talk to your...

Knowing when to refactor Just feeling like refactoring is not a good reason to do it. Make an educated decision...

When working with custom transactions and use ActiveRecord::Rollback you may encounter unexpected behaviour if you try to roll back...

We often use VCR to stub external APIs. Unfortunately VCR can have problems matching requests to recorded cassettes, and these...

SVG is an acronym for "scalable vector graphics". SVGs should be used whenever an image can be described with vector...

#reverse_order does not work with complex sorting constraints and may even silently create malformed SQL for rails < 5.

Rails 5 / 6 / 7 Method Uses Default Accessor Saves to Database Runs Validations Runs Callbacks Updates updated_at/updated_on Respects Readonly...

1. Sometimes you have search entries in the autocomplete of the address bar, which are higher weighted than your bookmarks...

AWstats is build to regularly run on webservers. If you want it to build a report once, here is the...

Detect if a gem has been activated A gem is activated if it is either in the current bundle (Gemfile.lock...

We have released a new library Gemika to help test a gem against multiple versions of Ruby, gem dependencies and...

This error can be caused by the mysql2 gem under mysterious circumstances. You need to remove it with gem uninstall...

Say you have an RGBA color that you need as a non-transparent color because of reasons. Basically, this is...

Same requests are recorded only once in vcr. Replaying a test fails, if you trigger the same request multiple times...

I've encountered a Ubuntu 16.04 today, where localhost resolved to ::1 instead of 127.0.0.1. This will not usually make...

Good article about what "gamma correction" means for color processing, and what "sRGB" actually means. You probably do not need...

These are Chrome plugins that proved useful at makandra. Each is the best-in-class. Dimensions Auto-measure distances by...

ActiveSupport::Notifications provides an instrumentation API for Ruby. It is used throughout rails to publish instrumentation events that include information...