I have an NSSet of Strings, and I want to convert it into [String]. How do I do that?
let set = NSSet(array: ["a","b","c"])
let arr = set.allObjects as! [String]
If you have a Set<String>
, you can use the Array constructor:
let set: Set<String> = // ...
let strings = Array(set)
Or if you have NSSet, there are a few different options:
let set: NSSet = // ...
let strings1 = set.allObjects as? [String] // or as!
let strings2 = Array(set as! Set<String>)
let strings3 = (set as? Set<String>).map(Array.init)
You could do something like this.
let set = //Whatever your set is
var array: [String] = []
for object in set {
array.append(object as! String)
}
I would use map
:
let nss = NSSet(array: ["a", "b", "a", "c"])
let arr = nss.map({ String($0) }) // Swift 2
let arr = map(nss, { "\($0)" }) // Swift 1