What is a equivalent of HashSet Java in Swift?

Question

I have specific logic in Java that uses HashSet<String>. Set collection contains only unique items.

For example:

Set<String> mySets = new HashSet<String>();
mySets.add("a");
mySets.add("a");
mySets.add("b");
mySets.add("a");

I get: ["a","b"].

What is equivalent collection in Swift?

Thanks,

this page https://developer.apple.com/library/prerelease/mac/documentation/Swift/Conceptual/Swift_Programming_Language/CollectionTypes.html talks about arrays and dictionary. Since Dictionary keys are unique, you could use a dummy value as value and work with keys only (like current HashSet implementation of Java) — Marco Acierno, Aug 11 '14 at 15:14
Swift 1.2 has a native Set type now, compare http://stackoverflow.com/a/28426765/1187415. — Martin R, Feb 10 '15 at 08:27

score 30 · Answer 1 · edited Mar 20 '19 at 15:42

30

The Swift to Java's HashSet is Set.

Example:

var s = Set<Character>()
s.insert("a")
s.insert("a")
s.insert("b")
s.insert("a")
print("s: \(s)")

output:

s: ["b", "a"]

edited Mar 20 '19 at 15:42

Mastergalen

answered Aug 11 '14 at 15:14

zaph

1 Answers1