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If you need risk level to be an enum (which sounds like good idea anyway), it would be nice to tightly couple the meaning of, say, Risk.Level2 with the range of raw values it represents, such as 1..<5 …

I was looking around for a Swift wrapper around NSUserDefaults and found some very nice projects (see e.g. SwiftyUserDefaults). Unfortunately, it all boils down to stringy keys galore... …

After resigning active state (going to the background), the mainWindow property of the main window in the app returns false. Nevertheless, I need a to find that window even when my app is not active, …

Yes, I see what you mean: there do appear to be dodgy race conditions. I do like where you are going with this, though – dot syntax and all. Still I found at least one failing test. If you paste your …

The following is an implementation of fixed-length sequences that makes very exotic (and hopefully fun) use of Swift 2.2 types. …

1. UserDefault property wrapper (core api) I wish I could go back and edit my first attempt towards “Typed NSUserDefaults”, but that would not be fair to my kind reviewers, so here I’m describing a so …

2. Going Global - declaring a property only once The single most difficult aspect of persisting data is maintaining the integrity of the data model/format. In the case of the proposed solution towards …

3. Observing strictly typed user defaults The final piece of the puzzle is a way of easily observing the changes of the underlining value of the UserDefault<T> property. To that end we can introduce t …

There is a way of improving the code as desired in that it is possible to constrain the type T to T: NSWindow. Upon introducing this change, however, the function will indeed return the first NSWindow …

This is a nice question and the answer by @Airspeed Velocity is an aesthetic experience. I'm afraid the following is unlikely to be to everyone's taste. To begin with, notice that the problem is dom …

The proposed approach hangs both on iOS and macOS (just not in unit tests executed in parallel), which is fascinating in its own right. See inline comments: @main struct BlockerApp: App { @St …

<string.utf16.count).description ... simply because Character in swift represents extended grapheme clusters, not utf code points. … Swift 3.0 is set to completely rethink indexing throughout the language, so we are yet to see whether we will no longer have to deal with these complexities (unless we explicitly want to). …

Can you think of a reason the following extension should not be used in production, or a better way of implementing it: public extension Range { @warn_unused_result public func intersect(oth …

While migrating to structured concurrency it may be sometimes convenient to temporarily make a blocking call to an async function - e.g.: let x: Int = try blocking { try await Task.sleep(nanosecon …

Regarding standard input, see Martin's answer below. As for splitting strings into words and returning them as a sorted dictionary with word counts, that sounds like a useful thing to have around as …