Ruby and Rails have several methods for creating a new object that looks like another: clone, dup, deep_dup. When...
When you have many changes, and you want to spread them across different commits, here is a way to stage...
The linked GitHub repository is a bit like our "dev" cards deck, but groomed from a single person (Josh Branchaud...
Simplecov is a code coverage tool. This helps you to find out which parts of your application are not tested...
"Everything in Ruby is an object". This is also true for nested hashes and arrays. If you copy a hash...
A recent patch level Ruby update caused troubles to some of us as applications started to complain about incompatible gem...
Embedding videos on a website is very easy, add a tag to your source code and it just works...
Ruby's Net::HTTP library repeats a failing request once, as long as it deems it idempotent (GET, HEAD etc...
TLS/SSL certificates are often used for HTTPS traffic. Occasionally a service may also use their TLS certificate to support public...
The linked article has a great explanation how to to deal with string encodings in Ruby. Furthermore you can check...
Debugging image color profiles is hard. You can't trust your eyes in this matter, as the image rendering depends...
If you want to make your Rails application be capable of sending SMTP emails, check out the action mailer configuration...
It's every developer's nightmare: SQL queries that get large and unwieldy. This can happen fairly quickly with the...
Install the latest bundler version: gem install bundler Fetching bundler-2.3.5.gem Successfully installed bundler-2.3.5 1 gem installed Update the bundler...
For newer Ubuntu versions we currently need to install the patch level version 1.8.7-p375, otherwise the dev dependencies from...
Rubygems supports a 2FA for your account. Once enabled you need to provide your personal OTP code for every release...
The Ruby standard lib ships with a YAML Parser called Psych. But serializing and deserializing data seems not as obvious...
Capybara provides execute_script and evaluate_script to execute JavaScript code in a Selenium-controlled browser. This however is not...
There is a practical short list for valid/invalid example email addresses - Thanks to Florian L.! The definition for valid emails...
Most of the time it is a tedious task to apply a code style guide to an existing code...
I got this error after upgrading Ruby from 2.4.5 to 2.6.4 when I opened the Rails console - rails server still...
When using Chrome for Selenium tests, the chromedriver binary will be used to control Chrome. To debug problems that stem...
The ruby sass gem also installs a command line tool to convert to and from SCSS. Use it for a...
Rails is split into a large number of (sub-) frameworks. The most important and central of those are activesupport (extends...