Karoy Lorentey with the announcement:
The Swift Standard Library currently implements the three most essential general-purpose data structures:
Dictionary. These are the right tool for a wide variety of use cases, and they are particularly well-suited for use as currency types. But sometimes, in order to efficiently solve a problem or to maintain an invariant, Swift programmers would benefit from a larger library of data structures.
We expect the Collections package to empower you to write faster and more reliable programs, with less effort.