swift - Add sort to array wrapping class -

the following code answer: https://stackoverflow.com/a/28191539/4096655

public class synchronizedarray<t> {     private var array: [t] = []     private let accessqueue = dispatch_queue_create("synchronizedarrayaccess", dispatch_queue_serial)      public func append(newelement: t) {         dispatch_async(self.accessqueue) {             self.array.append(newelement)         }     }      public subscript(index: int) -> t {         set {             dispatch_async(self.accessqueue) {                 self.array[index] = newvalue             }         }         {             var element: t!              dispatch_sync(self.accessqueue) {                 element = self.array[index]             }              return element         }     } }  var = synchronizedarray<int>() a.append(1) a.append(2) a.append(3)  // can empty non-thread safe access println(a.array)  // thread-safe synchonized access println(a[0]) println(a[1]) println(a[2]) 

i doing having trouble setting sort pass array of generics. ideally i'd sortinplace not sure how it.

if want sort wrapped array, 1 way constrain t type conforming comparable. if add restriction, sorting function easy implement, ask array sort itself:

public class synchronizedarray<t: comparable> {  ...  public func sortinplace() {     array.sortinplace(<) } 

for custom classes, need add extension conforming comparable, , overload == , < operators (reference here)

extension myclass: comparable {  }  func ==(lhs: myclass, rhs: myclass) -> bool {  }  func <(lhs: myclass, rhs: myclass) -> bool {  }  var = synchronizedarray<myclass>()