Objective C and the Slice Behavior in Swift

Swift has a trio of main collections, like dictionaries, arrays, and sets that also Objective C shipped with as well. And the slice behavior is actually really important when you're writing a parsers for Swift or Shapescript. They rely pretty heavily on this ability to chunk your way through a string without actually having to copy chunks of it at a time. That core three data types is pretty much everything you need for most applications.