How Café and Café are actually different, and only one of those can be a filename in macOS, despite APFS being a non-normalising file system.
Unicode
When a “fixed” formatting string proves anything but fixed, then breaks without warning or even mention in a release note.
How Apple made changes to Foundation routines which format dates and times which can break their formatting when in 12-hour clock mode.
Normalises strings to any of the four standard Unicode normalisation forms C, D, KC or KD, supplied with source.
What’s the harm in using a tool to apply ‘styles’ to plain Unicode text in a tweet, or similar?
How to hide text so that it can’t be searched or analysed, and how file naming almost brought APFS down.
Universal App to obfuscate text using unusual Unicode code points which look the same but are different.
Universal App which gives deep insight into Unicode normalisation problems, string comparison, and more.
Thanks to Michele, who discovered one of those rare Unicode UTF-16 text files, found that DelightEd couldn’t make […]
How can you put four files with apparently identical names in the same folder? Here’s the secret, and the magic of Unicode.
The Eclectic Light Company 