There is no CSS selector for matching elements that contains a given string ¹. Luckily, Capybara offers the :text option to...

When testing your command line application with Aruba, you might need to stub out other binaries you don't want...

A Rake task appears in rake -T if it has a description: desc 'Compile assets' task :compile do ... end

When you're writing specs for ActiveRecord models that use memoization, a simple #reload will not do: it 'updates on...

We used zeroclipboard.js in some of our projects but now we switched to clipboard.js because it does not rely on...

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...

When a directory has more than a few thousand entries, ls will start taking really long to list its content...

You can have a command repeatedly executed and the output displayed. This is useful e.g. for monitoring file system changes...

If you are fine with the default console diff most of the time but only sometimes want to use an...

This might be relevant for us since we're often managing customer documents in our apps. I played around with...

VCR lets you configure how it matches requests to recorded cassettes: In order to properly replay previously recorded requests, VCR...

If you want to find the commits that touched a specific text in a file, use git log -S 'text...

Using the -U parameter you can change how many lines are shown above and below a changed section.

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

Run dconf-editor (as your user) Go to org / mate / panel / objects / clock / prefs Change the key format to custom...

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.