[{"bar": "0"}, {"bar": "1"}]

var data = "[{"bar": "0"}, {"bar": "1"}]"
var deserializationError: NSError?
if let jsonData: AnyObject = NSJSONSerialization.JSONObjectWithData(data.dataUsingEncoding(NSUTF8StringEncoding)!, options: nil, error: &deserializationError) {
    if let parsedData = jsonData as? [[String: AnyObject]] {
        // ...
    }
}