Sometimes you need to run background jobs that you can't make important guarantees about - they may run out of...

If a SOAP API expects you to call a remote method with arguments of complex types, Savon lets you manually...

Large projects usually have large test suites that can run for a long time. This can be annoying as running...

How can a client blame you for a cab driver’s mistake? How can a conference organizer hold you accountable...

Get an idea of the varying support for HTML/CSS/JavaScript features in different browsers like Chrome, Firefox, Internet Explorer, Edge...

Learn Enough Command Line to be Dangerous (it's in our library => Google Drive) CLI tricks every developer should...

Action Mailer Basics and Previews Chapter "Task H1: Sending Confirmation Emails" from Agile Web Development with Rails (in our...

Learn to treat files as an ActiveRecord attribute type, like :string or :integer Research Look at the README for...

Understand what Memoization is and when it can be useful. Understand the @variable ||= computation pattern. Learn how to use...

Understand why we use pagination Exercises Create 7500 movies in MovieDB (hint: Doing it in a single transaction is...

Learn to read and write Haml. Understand the different attributes syntaxes (curly braces vs. round parentheses) Exercises Convert MovieDB...

CSS (+ some Javascript) framework, implementing Google's material design for static web pages. Can be used for plain websites without...

In most of our applications, users have their first and last name stored in separate columns. However, specifying them separately...

Git is our version control system. Goals Understand why we use git. Learn how to work with your local repository...

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

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...

Today I ran into this: Invalid gemspec in [/usr/local/rvm/gems/ruby-1.9.3-p194/specifications/ZenTest-4.9.3.gemspec]: Illformed requirement ["< 2.1, >= 1.8"]. You need a newer Rubygems version. Try...

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...

Small web application where you can upload an image (PNG, JPEG, GIF) and generate a base64-encoded version of it...