SE0270_RangeSet is a standalone library that implements the Swift Evolution proposal SE-0270: Add Collection Operations on Noncontiguous Elements. You can use this package independently, or as part of the standard library preview package.

SE0270_RangeSet provides operations on noncontiguous subranges of collections, such as subranges(where:) and moveSubranges(_:to:), as well as the supporting RangeSet type.

import SE0270_RangeSet

var numbers = [10, 12, -5, 14, -3, -9, 15]
let negatives = numbers.subranges(where: { $0 < 0 })
// numbers[negatives].count == 3

numbers.moveSubranges(negatives, to: 0)
// numbers == [-5, -3, -9, 10, 12, 14, 15]

You can add this library as a dependency to any Swift package. Add this line to the dependencies parameter in your Package.swift file:

.package(
    url: "https://github.com/apple/swift-se0270-range-set",
    from: "1.0.0"),

Next, add the module as a dependency for your targets that will use the library:

.product(name: "SE0270_RangeSet", package: "swift-se0270-range-set"),

You can now use import SE0270_RangeSet to make the library available in any Swift file.

Contributions to this package and the standard library preview package are welcomed and encouraged!

• For help using this package or the standard library preview package, please visit the Swift forums.
• For issues related to these packages, file a bug at bugs.swift.org.
• Changes or additions to the APIs are made through the Swift Evolution process. Please see the guide for Contributing to Swift for information.