Hi, I’m Ole. I’m a developer from Berlin and co-author of Advanced Swift. Here, I mainly write about Swift and app development on Apple platforms. More about me.

1. How OrderedSet works

   I did not understand how OrderedSet in the new Swift Collections library uses a hash table of array indices for fast lookups, so I read the source code to find out. More >

   April 30, 2021

2. My favorite books 2020

   Mostly non-fiction books this year. Some in English, some in German. More >

   December 31, 2020

3. Thinking in SwiftUI

   The second edition of Thinking in SwiftUI is out now. I had a small part in the creation of the book as a technical reviewer. More >

   December 19, 2020

4. Where is end-to-end encryption for iCloud?

   Despite Apple’s bold privacy claims, a large portion of your data stored in iCloud is still not end-to-end encrypted. More >

   December 10, 2020

5. as, as?, and as!

   The as and as? operators in Swift are more different than their similar names suggest. More >

   June 29, 2020