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Swift: Async concurrent enumerated array
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| import Foundation | |
| public extension Array { | |
| public func asyncConcurrentEnumerated<T>( | |
| each: (_ object: T, _ completion: (Bool) -> ()) throws -> ()) -> Error? | |
| { | |
| let dispatchGroup = DispatchGroup() | |
| let array = NSArray(array: self) | |
| var eachError: Error? | |
| array.enumerateObjects(options: .concurrent) { obj, key, stop in | |
| guard let object = obj as? T else { | |
| return | |
| } | |
| dispatchGroup.enter() | |
| do { | |
| try each( | |
| object, | |
| { stopValue in | |
| if stopValue == true { | |
| stop.pointee = true | |
| } | |
| dispatchGroup.leave() | |
| } | |
| ) | |
| } catch { | |
| eachError = error | |
| stop.pointee = true | |
| dispatchGroup.leave() | |
| } | |
| } | |
| dispatchGroup.wait() | |
| return eachError | |
| } | |
| } |
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