An IPTV client needed Picture-in-Picture, and the VLCKit line it ran on does not have it. Notes on owning a C engine rather than consuming one — pointer isolation, lifetimes nothing checks, a patch set carried against VLC's own source, and what that costs.
SwifterSwift passed five hundred extensions and began colliding with other libraries. A member added to a type you do not own is not scoped to your library at all — it is global, and no module qualifier reaches it.
GitHub stopped accepting passwords for Git in August 2021. A token in a credential helper solves the typing but not the expiry; a key solves both, and reaches the HTTPS URLs you did not write yourself.
Finding the first match, ordering by more than one key, and checking an index against a range. The hand-written version of each is longer, and two of the three are also slower.
willSet and didSet take a parameter, and both have a default name — so naming them explicitly is usually redundant. The rules about when they do not fire matter more.
Naming a completion handler once and writing Handler<Post> at each call site. It gives you readability and a single place to change the signature. It does not give you type safety.
The extension turns an out-of-bounds crash into nil. That is useful when the index comes from outside your own code, and hides a logic error when it does not.