You can use Unpoly's up.on with a named listener function and immediately unbind this event listener with { once: true...

If you're using many terraform root modules in a repository, downloading common providers like the AWS one can quickly...

tl;dr: Use the URLSearchParams API to make your live easier if you want to get or manipulate query parameters...

Redis.current will be removed without replacement in redis-rb 5.0. Version 4.6.0 adds deprecation warnings for Redis.current and Redis.current=: `Redis.current...

RSpec's let allows you to super into "outside" definitions, in parent contexts. Example: describe '#save' do subject { described_class.new(attributes...

Wir wollen verstehen, welche Hardware-Ressourcen uns zur Verfügung stehen und wie wir mögliche Engpässe und Probleme identifizieren können. Grundsätzlich...

Schau dir den unter Inhalte verlinkten Udemy Kurs an. Die Zugangsdaten für Udemy bekommst Du von deinem Mentor. Überspring Inhalte...

Wir arbeiten bei makandra alle auf Linux-Betriebssystemen und bedienen im DevOps- & Cloud-Bereich primär Kunden, die ebenfalls auf Linux...

Sometimes we write plain SQL queries in migrations so we don't have to mock ActiveRecord classes. These two migrations...

Jasmine is a great tool to unit test your JavaScript components without writing an expensive end-to-end test for...

Resources RubyGuides: Mastering Ruby Regular Expressions Using regular expressions in JavaScript Testing regular expressions visually Regular Expressions: Quantifier modes...

Learn to create test data effectively using factories. Decouple tests by having each test start with an empty database...

JavaScript code can access and manipulate the browser's DOM tree. Using JavaScript we can add interactive behavior to our...

When using where.not with a Hash of multiple attributes, Rails applies logical NAND (NOT (A AND B)). This contrasts with...

You can use RSpec::Matchers.define_negated_matcher to define a negated version of an existing matcher. This is particularly useful...

In my case [...] the catalog is an XML that contains all kinds of possible products, categories and vendors and it...

TL;DR When using Cache-Control on a Rails application, make sure the Vary: Accept header is set.

Field error steps Spreewald's The...

...field should have an error and The...

...field should have the error...

...steps now...

The Interactive Advertising Bureau (IAB) is a European marketing association which has introduced a standard how advertising can be served...

Rails 6.1 has a "strict loading" mode that forces the developer to preload any association they plan to use. Associations...

A flaky test is a test that is often green, but sometimes red. It may only fail on some PCs...

Basic validations Read the Rails Guide on ActiveRecord Validations. You should have an overview which kinds of validations are built...

This RailsCast demonstrated a very convenient method to activate VCR for a spec by simply tagging it with :vcr.

You want to use fields in your applications. However, your desktop users may encounter some weird quirks: Aside from allowing...