Isolate Side Effects in Ruby

To temporarily change the current working directory in Ruby, call Dir.chdir with a block. The previous working directory will be restored when the block ends:

Dir.chdir('/usr/local') do
  # do stuff in /usr/local
end

Find conditions for scopes can be given either as an array (:conditions => ['state = ?', 'draft']) or a hash (:conditions => { 'state' => 'draft' }). The later is nicer to read, but has horrible security implications in some versions of Ru...

Some older Node modules rely on window.jQuery to be present. One suggested solution is to use this config in the app/config/webpack/environment.js:

const { environment...

The basics of Isolate, a tool for replacing Bundler in gem management.

Terminus is a Capybara driver where most of the driver functions are implemented in client-side JavaScript. It lets you script any browser on any machine using the Capybara API, without any browser plugins or extensions.

When a method has keyword arguments, Ruby offers implicit conversion of a Hash argument into keyword arguments. This conversion is perfo...

There seems to be no way to use therubyracer -v '0.11.4' and libv8 -v '3.11.8.17' on OS X Mavericks.

However, running bundle update therubyracer worked for me. It installed therubyracer -v '0.12.1' and libv8 -v '3.16.14.3' and I had not...

As announced before, Ruby has introduced a safe navigation operator with version 2.3.0. receiver&.method prevents NoMethodErrors by intercepting method invoca...

The Ruby standard lib ships with a YAML Parser called Psych. But serializing and deserializing data seems not as obvious as if you are using JSON.

To safely write and read YAML files you should use Psych#dump (String#to_yaml) and `Psych.safe...

It is a common misunderstanding that all [op]=-operators work the same way, but actually they don't.

||= and &&=

Those are special cases, because the assignment will only happen if the first variable passes the check (false or `ni...