closwure

class FRWindowController {
    // ...
    
    // here we can log both output and command together
    func runJavaScript(command: String){
        webView?.evaluateJavaScript(command, completionHandler: { (output, error) -> Void in
            // woo hoo
            NSLog("\(command) has output \(output)")
        })
    }

    // if i want to pass this in, so  we could do something like 
    // func runJavaScript(command : String, completionHandler: ((AnyObject!, NSError!) -> Void))
    // how do we access command?
    func defaultCompletionHandler(output: AnyObject!, error: NSError!) -> Void {
        if(error != nil){
            FRLogger.sharedInstance.error("Error running js command:'\(command)', error:'\(error)'")
        }
        if(output != nil){
            FRLogger.sharedInstance.info("Output from command: '\(command)', output:'\(output)'")
        }
    }