There is no such thing as a "default order" of rows in database tables. For instance, when you paginate a...
All major browsers (IE8+, FF3.5+, Safari 4+, any Chrome) support sessionStorage, a JavaScript storage object that survives page reloads and...
FactoryBot.define do factory :parent do transient do child_name nil child_allowed_to_drive false end child do association(:child...
Several Rails migration methods accept index: true as an option to create an index. In some cases (like #add_column...
It is a common misunderstanding that all [op]=-operators work the same way, but actually they don't. ||= and &&=
In RSpec you can tag examples or example groups with any tags you like simply by saying describe ReportCreator, slow...
# Given the following models class Image < ActiveRecord::Base has_many :album_images has_many :albums, through: :album_images
When ending a Selenium test Capybara resets the browser state by closing the tab, clearing cookies, localStorage, etc.
You know that ActiveRecord caches associations so they are not loaded twice for the same object. You also know that...
Web applications can be used by multiple users at the same time. A typical application server like Passenger has multiple...
RSpec 3 has verifying doubles. This breed of mock objects check that any methods being stubbed are present on an...
Please don't simply copy line number links from Github. The URL usually contains a branch name like master which...
Be careful when using buttons without a type attribute, since browsers will consider them the default submit button of a...
This guide shows how to create an AngularJS application that consumes more and more memory until, eventually, the browser process...
The CSS property z-index is not as global as you might think. Actually, it is scoped to a so...
SVG files are often much larger than necessary, containing comments, metadata, hidden elements etc. Optimize them with this tool.
Just run git show branch:file. Examples: git show HEAD~:bin/command git show origin/master:../lib/version.rb
Here is a Javascript function reloadUsers() that fetches a HTML snippet from the server using AJAX and replaces the current...
Capybara-screenshot can automatically save screenshots and the HTML for failed Capybara tests in Cucumber, RSpec or Minitest. Requires Capybara...
Rails includes a way to see what an e-mail will look like. Integration to RSpec All you need to...
You can do so much more than console.log(...)! See the attached link for a great breakdown of what the developer...
When accepting GIF images, you will also accept animated GIFs. Resizing them can be a time-consuming task and will...
One of the many useful features of TextMate is autocompletion of words. If I were in TextMate right now, I...
A great two-part article about various hacks you can use to create great-looking screen designers when you're...