Swfit NSDictionary Extension with helpers to parse ObjectiveDDP dictionaries

gistfile1.swift

extension NSDictionary{
    func getDateFromKey(key:String) -> NSNumber?{
        if let date = (self.objectForKey(key) as? NSDictionary)?["$date"] as? NSNumber{
            return date
        }
        return nil
    }
    
    func getFromKeyPath(keyPath:String)->AnyObject?{
        let keysArray = split(keyPath) {$0 == "."}
        if(keysArray.count > 0){
            let newArray = Array(keysArray[1..<keysArray.count])
            if let newDictionary = self.valueForKey(keysArray[0]) as? NSDictionary{
                return newDictionary.getFromKeyPath(".".join(newArray))
            }
        }
        return self.valueForKey(keyPath)
    }
}