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. Roy Fielding’s REST dissertation

   I recently read Roy Fielding’s 2000 PhD thesis in which he introduced REST. Here’s what I learned. More >

   October 31, 2018

2. PhotoKit’s data model

   An entity graph of the Core Data data model used by Apple’s Photos framework on iOS. More >

   September 28, 2018

3. It’s wrappers all the way down

   Swift 4.2 comes with a lastIndex(of:) method. I explore how one might implement this method manually and why this is a good exercise to understand the standard library’s collection design. More >

   September 25, 2018

4. The 2018 Macbook Pro

   My impressions after using a maxed-out 2018 MacBook Pro for three weeks. More >

   September 7, 2018

5. Why you’re not supposed to call description

   The documentation for the CustomStringConvertible protocol discourages accessing a value’s description property directly. Instead, you’re supposed to call String(describing:). Why? More >

   August 31, 2018