"Keyword arguments" allow naming method arguments (optionally setting a default value). By using the double-splat operator, you can collect...
As you know, assignable_values does not invalidate a record even when an attribute value becomes unassignable. See this example...
Travis CI is a free continuous integration testing service. However, it is really fragile and will break more than it...
When you tell rbenv to install a Ruby it does not know about, you will get an error message.
RSpec 3.0 deprecates the :should way of writing specs for expecting things to happen. However, if you have tests you...
When you have a string containing umlauts which don't behave as expected (are not matched with a regexp, can...
Sometimes you're getting an ActiveSupport deprecation warning that you cannot or don't want to fix. In these cases...
Warnings like those below may originate from rspec or shoulda-matchers or other gems that have not updated yet to...
SimpleForm is a great approach to simplifying your forms, and it comes with lots of well-defined input types. However...
When your Rails controller action responds with only a simple text, render text: 'Hello' may not be what you want...
I use this to simulate the (non-existing) :last-letter CSS pseudoclass, e. g. to insert a tombstone at the...
Since version 34, Chromium/Chrome ignores the autocomplete="off" attribute on forms or input fields. Recent versions of other browser do...
The error unexpected 'x' after 'DESCENDANT_SELECTOR' (Nokogiri::CSS::SyntaxError) (where x may be basically any character) occurs when the...
There are 3 built-in file descriptors: stdin, stdout and stderr (std=standard). (You can define your own, see the...
config.action_controller.action_on_unpermitted_parameters enables logging or raising an exception if parameters that are not explicitly permitted are...
When using @media CSS queries, Internet Explorer 8 and below will fail to respect them. Though there are several options...
Edge Rider gives your relations a method #origin_class that returns the class the relation is based on.
React.js is a relatively new Javascript templating engine that has two-way-bindings like AngularJS or Batman. The interesting idea...
Spring is a Rails application preloader. When debugging e.g. the rails gem, you'll be wondering why your raise, puts...
Programatically invoke Rails generators Require the generator, instantiate it and invoke it (because generators are Thor::Groups, you need...
So you have a restangular collection and you want to remove an element from it, after you've successfully deleted...
With this command you can initiate an application restart without touching restart.txt. Unlike touching restart.txt, this tool initiates the restart...
If you regularly get ActionView::MissingTemplate exceptions, maybe some bot visits your site requesting silly formats like: http://www.rails-app.com/makandra.html-username-2000...
If you are using Angular and want something like Rails' simple_format which HTML-formats a plain-text input into...