The team is responsible for building great software—that’s it. It’s the only thing the team is responsible...

If you see a stacktrace beginning with lines like this: E, [2015-07-16T09:23:10.896146 #23308] ERROR -- : app...

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

Understand the differences between git diff and git diff --staged (or git diff --cached) Understand the difference between git...

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...

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...

In this card we will learn to write code that scales with a large number of database records. We will...

JavaScript is a scripting language supported by all browsers. Browsers don't speak Ruby, so if we want to implement...

Understand at least the following CSS concepts: Classes Selecting elements for styling Basic styling (color, typography, spacing)

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...

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...

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

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

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...

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

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

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...