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. as, as?, and as!

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

   June 29, 2020

2. Sanitizing GPX files for public sharing

   How to use XmlStarlet to strip out unwanted or privacy-sensitive information from a GPX file before sharing it on the web. More >

   June 22, 2020

3. Linking to text fragments in web pages

   Text fragments are a way for web links to specify a word or phrase a browser should highlight on the destination page. More >

   June 21, 2020

4. Testing UIKit accessibility in unit tests

   How to write a unit test that uses UIKit’s accessibility properties. More >

   April 30, 2020

5. Testing Swift packages on Linux using Docker

   You are on a Mac and want to run or test one of your SwiftPM packages on Linux? Here’s a quick how-to, using Docker. More >

   February 2, 2020