Swift Algorithms Tips Surface

Paul Hudson is the creator of Hacking with Swift and has written guides and commentary about the Swift Algorithms package, including a December 3, 2021 article that walks through high‑level uses of the package. (hackingwithswift.com) compacted() is documented in the Swift Algorithms guides as a dedicated helper to remove nils from sequences—functionally equivalent to using compactMap { $0 } but named for clarity and intent. (github.com) uniqued() returns a sequence that drops duplicates while preserving relative order, offers uniqued(on:) to define uniqueness by a projection, has a lazy variant on LazySequenceProtocol, and the eager uniqued(on:) is O(n) time and space while lazy forms are O(1). (github.com) product() in the package produces the Cartesian product of two or more collections (replacing nested for‑loops with a declarative sequence), with implementation and guide material included in the repository’s Product.swift and Product.md files. (github.com) All three helpers live in the apple/swift-algorithms open‑source repository, which Apple announced as an official package on October 7, 2020 and maintains with a Package.swift manifest for Swift Package Manager integration. (github.com) The package is actively maintained and published to package indexes (release 1.2.1 lists multiple contributors by handle), so teams can add the dependency via SPM to adopt these helpers without forking common utility code. (swiftpackageregistry.com)