From the site:
How do the Objective-C patterns we already know translate into Swift?
Patterns are your go-to code chunks; the things you know exactly how to do in Objective-C because you've framed code like it in all of your projects. Swift syntax seems to come pretty easy to iOS developers but we still need a lot of exploration to find the best reimplementations our favorite patterns in Swift.
The site is a statically generated blog built using Hugo, with a customized version of the Herring Cove theme.
All of the posts, even some drafts that have yet to make it onto the public site, are in content if you'd like to suggest changes or fix stupid spelling mistakes on my part (as a few people already have).