Immutable/Mutable Collections in Swift

Question

I was referring to Apple\'s Swift programming guide for understanding creation of Mutable/ immutable objects(Array, Dictionary, Sets, Data) in Swift language. But I could\'t

Answer 1

There is only one Array and one Dictionary type in Swift. The mutability depends on how you construct it:

var mutableArray = [1,2,3]
let immutableArray = [1,2,3]

i.e. if you create an assign to a variable it is mutable, whereas if you create an assign to constant it is not.

WARNING: Immutable arrays are not entirely immutable! You can still change their contents, just not their overall length!