Windows – HyperV is not available on Home editions

The answer can be found further up in the article that provided your example:

When the table view controller loads its view, it should fetch the Event objects and keep them in the events array so that they can be displayed later. The events array needs to be mutable since the user can add and remove events.

The block of code in your example is one part of a multi-part process of fetching managed objects from a persistent store. The next step in the process will call setEventsArray:, which requires a mutable array.

The Google Hacking Database is a database list of queries that expose known issues with software that runs websites. There are some bugs that expose information you might not want the public reading (passwords, etc).

This isn't hacking you understand. This is just stuff Google has picked up while browsing around sites.

But turning to the scanner, anything which relies just on what Google can see isn't going to be very thorough for security analysis. Without looking too closely, I imaging wikto uses the patterns in the GHDB and tests them against your own site. If it finds matches, you might have a problem.

It's not going to test for actual exploits which are a real issue and will usually leave you much more open.