Understand how asynchronous JavaScript works: Read Henning's presentation about asynchronous Javascript (there's also a German video presentation...
Exercise 1: Maps In MovieDB, add a new field “Principal filming location”. In a movie’s show view, geocode that...
Use form models to handle this problem Or soften the validation to validates_presence_of :parent
There is no single place to look up documentation for our stack. This card includes some hints where you can...
Each time thin boots, it prints a boot message : Thin web server (v1.6.3 codename Protein Powder) Maximum connections set to...
A word of caution There should rarely be a reason for you to split up config/routes.rb. If you need to...
MarcoPolo shows your app name and environment in your console prompt so you don't accidentally break production Officially supporting...
Web security basics Einführung in die Web Security 🇩🇪 provides essentials for the topic of this card. Read following chapters:
Rubymonk training Read the following Rubymonk articles: Ruby Primer: Ascent (archived copy) Metaprogramming Ruby (archived copy) Metaprogramming Ruby: Ascent (archived...
Watch Solving bizarre authorization requirements with Rails Read the Consul README Read the assignable_values README Understand how Consul...
CTRL + SHIFT + ALT + N Search for any symbol in your application, like CSS classes, Ruby classes, methods, helpers etc...
Authentication is all about being able to verify the identity of a user in the context of our application.
In tests, it is sometimes useful to create records with specific ids. On PostgreSQL this can cause problems: Usually, PostgreSQL...
Read (or re-read) the following chapters from our book Growing Rails Applications in Practice (it’s in our...
Stepping forward from JavaScript Basics, the goal of this card is for you to be able to read and write...
A common task in web applications is to add client-side JavaScript behavior to existing HTML elements.
Software engineering principles Read about the following software engineering principles and code smells: Single Responsibility Principle Law of Demeter
Jasmine comes with two matchers that test for equality. The first is toBe: expect(first).toBe(second) toBe passes when...
The easiest way to freeze or travel through time in a Jasmine spec is to use the built-in jasmine.clock...
If you are writing any amount of Javascript, you are probably using closures to hide local state, e.g. to have...
tl;dr: Use event.currentTarget unless you are absolutely certain that you need event.target. Since it hasn't been written down...
If you need the debug output of the puppetmaster running with passenger you have to uncomment this setting in the...
iPads will not trigger click events for all elements. You can fix that, but you don't want to know...
Running projects parallel makes some trouble with PDF generation. Use geordi rspec spec to force sequential tests for the whole...