Understanding the bin, sbin, usr/bin , usr/sbin split

Understanding the Selenium error "Modal Dialog Present" (aka Selenium::WebDriver::Error::UnhandledAlertError)

So your Cucumber feature sometimes dies with this exception:

Modal Dialog Present (Selenium::WebDriver::Error::UnhandledAlertError)

As a seasoned Selenium veteran you are used to misleading error messages. Hence you might be surprised ...

In Ruby, classes and modules are called constants. This card explains how Ruby resolves the meaning of a constant.

E. g. in the following example, Array could mean either Foo::Array or simply Array:

class Fo...

Ruby's String#split returns an array of substrings from the given string. Usually, this is missing the split characters:

>> 'user@example.com'.split('@')
=> ["user", "example.com"]

If you want to join those parts later on, you migh...

If you would like to split a Ruby array into pairs of two, you can use the Rails ActiveSupport method in_groups_of:

>> [1...