TIL
A collection of short, unsorted notes on things I’ve learned, mostly about development for Apple platforms. Inspired by Simon Willison and Chris Eidhof.
Today I learned how to convert YAML to JSON directly from the command line using yq (not to be confused with the Python implementation): yq eval data.yaml -o json -P > data.json
Today I learned that Group and ForEach have public support for accessing their subviews starting in iOS 18 and macOS 15 using the Group.init(subviews:transform:) and ForEach.init(subviews:content:) initializers, respectively.
Today I learned that wrapping a Swift string literal in pound signs removes the need to escape quotes. Instead of "{\"key\": \"value\"}" you can write #"{"key": "value"}"#.
Today I learned that NSAlert allows setting a custom icon image to replace the default app icon.
Today I learned that submenus on iOS display a bold chevron on the left when presented on an iPhone and a more subtle chevron on the right when presented on an iPad.
Today I learned that when moving items in a list on iOS, UIKit uses target indices as they are after deletion, while SwiftUI uses them as they were before deleting the moved item.