IainDelaney

@objc protocol Timer {
    func scheduleTimer(target:AnyObject, selector: Selector, interval: NSTimeInterval)->String
    func cancelTimer(id:String)
}

@objc class NSTimerService: Timer {
    var timers:[String:NSTimer] = [:]
    
    func scheduleTimer(target:AnyObject, selector: Selector, interval: NSTimeInterval)->String {
        let id = NSUUID().UUIDString

IainDelaney

Note: clientId and facId are primary keys to the server database, numbers stored in NSStrings

// Mandatory fields: clientId, facId
- (NSError *)validateData {
    
    id sel1 = [NSValue valueWithPointer:@selector(clientId)];
    id sel2 = [NSValue valueWithPointer:@selector(facId)];
    
    return [self validateMandatoryFields:@[sel1, sel2]];
}

IainDelaney

		let test1 = [[0,1,1,0,1],
			           [0,1,0,1,0],
			           [0,0,0,0,1],
			           [0,1,0,0,0]]
		let test2=[[0]]

		print( minHours(test1))
		print(minHours(test2))
	}
	func minHours(_ matrix:[[Int]]) -> Int {

IainDelaney

		let islands = [[1,0,0,0,0],[0,0,1,1,0],[0,1,1,0,0],[0,0,0,0,0],[1,1,0,0,1],[1,1,0,0,1]]
		print(numberOfIslands(islands))

	func numberOfIslands(_ islands:[[Int]]) -> Int {
		if islands.count == 0 {
			return -1
		}

		var grid = islands
		var numberOfIslands = 0