A set of protocols and types I use in all of my projects.

• Array+Extensions: Adds a method to remove duplicate elements from arrays of hashable types.
• DateFormatter+Extensions: Provides a static ISO8601 date formatter with fractional seconds support.
• FileManager+ContainerDirectories: Convenience properties for accessing and creating app sandbox directories like Caches and Documents.
• FormatStyle+Extensions: Adds static ISO8601 format styles and parse strategies with fractional seconds for dates.
• HelperFunctions: Utility functions for discarding values and returning constants.
• InfoPlistKey: Type-safe access to Info.plist keys.
• Int+Extensions: Helpers for representing integers as bytes, kilobytes, megabytes, and gigabytes.
• NotificationToken: A wrapper for Notification observers that auto-removes on deinit.
• OSLog+Extensions: Simplifies creation of Logger and OSLog instances with custom subsystems and categories.
• StringExtensions: Adds quoting and locale-aware quoting utilities to String.
• URL+StaticString: Allows initialization of a URL from a StaticString.

• AnyCodingKey: A reusable coding key for dynamic key scenarios.
• AnyDecodable: Type-erased wrapper for decoding values of unknown type.
• Decoder+Context: Protocol and helpers for attaching context to a decoder.
• DecodingError+DebugDescription: Adds detailed debug descriptions to decoding errors.
• JSONDecoder+DecodingStrategies: Custom date decoding strategies, including ISO8601 with fractional seconds.
• JSONEncoder+EncodingStrategies: Custom date encoding strategies, including ISO8601 with fractional seconds.
• KeyedDecodingContainer+Extensions: Helpers for decoding values by inferring types.

Add the package to your dependencies in Package.swift:

.package(url: "https://github.com/justin/jww-standard-lib.git", from: "1.0.0")

Then add JWWCore to your target dependencies:

.target(
    name: "YourTarget",
    dependencies: [
        .product(name: "JWWCore", package: "jww-standard-lib")
    ]
)

Run swift build to fetch and build the package.

1. Go to File > Add Packages...
2. Enter the URL: https://github.com/justin/jww-standard-lib.git
3. Choose the version and add the JWWCore product to your target.

Copyright 2025 Justin Williams. Licensed under the MIT license.