I’m a big fan of functions with variadic parameters in Swift, especially when I want an API to feel a bit more “lightweight”, since no array needs to be created at the call site in order to pass multiple (or zero) arguments.

// When using a variadic parameter, any number of arguments can
// be passed, and the compiler will automatically organize them
// into an array.
func send(_ message: Message, attaching attachments: Attachment...) {
    ...
}

// Passing no variadic arguments:
send(message)

// Passing either a single, or multiple variadic arguments:
send(message, attaching: image)
send(message, attaching: image, document)

For two weeks, many websites around the Swift community are featuring indie developers who have been financially impacted by the current pandemic. If you can, please help support these indies by downloading their apps. Today’s app is...

HazeOver: Minimize distractions by automatically dimming all Mac windows except the currently active one. Perfect for when you want to maintain focus on a task, without having to go full screen.