Understand why we test: Low defect rate without a QA department. Customer acceptance testing can concentrate on new features...

Rails is our web framework. Goals Be able to write a simple Rails application. Understand how Rails talks to the...

makandra is responsible for maintaining about 75 Ruby projects. These projects use a large number of different versions for Ruby...

Ruby is the programming language we use on the backend. Goals After finishing this lesson you should be able to...

When using ORDER BY "column" in PostgreSQL, NULL values will come last. When using ORDER BY "column" DESC, NULLs will...

Disabling auto-complete in login forms is probably a bad idea, since it encourages weak passwords. If you are still...

SmartUnderline is an open-source JavaScript library which uses clever tricks to draw underlines in a more beautiful and readable...

If you need to follow links, click buttons, etc. using Capybara inside an , you can do it like this:

In my RubyMine I have recorded two macros for debugging and linked them to some keyboard shortcuts. Since I believe...

CSS support in major e-mail clients is horrible. This will give you an overview what you will not be...

Insanely detailled guide about controlling copy & paste behavior using web technology in 2015. Note that you can now trigger a...

If you're supporting IE9+, you can listen to input to see if a text field changes. Other than change...

Note: ActiveRecord::Base#becomes has a lot of quirks and inconsistent behavior. You probably want to use ActiveType.cast instead.

Starting from 4.1, Rails automatically detects the inverse of an association, based on heuristics. Unfortunately, it does not seem to...

HTTP/2 will make our applications faster, simpler, and more robust—a rare combination—by allowing us to undo many of...

Since version 2.6 exception notifier distinguishes between foreground and background sections. The reason is that with background jobs (e.g. methods...

Good article about ruby singleton classes.

Note: Making a reverse proxy with nginx is much more straightforward. A reverse proxy is a "man in the middle...

sslscan is a nice tool to show details about TLS/SSL connections: ~> sslscan some-host-at.makandra.de Testing SSL server some-host-at.makandra.de on port 443...

Capistrano 3 is a major rework of the framework and requires several adjustments to your deploy configuration files. The biggest...

When using Savon to connect a SOAP API, you may want to use Savon::SpecHelper to mock requests in your...

I was annoyed that RubyMine's autocompletion did not work via Ctrl+Space for me. In fact, it did not...

After adding a vdisk to an ESXi linux guest you will assert that you can't find a new device...