Question

I am making a summary data frame from multiple data frames. The code I am using works correctly to replace the first row in the new frame but does not work for any other row.

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var scoreLabel: UILabel!

    var points: Int = 0

    func randomPoint() -> CGPoint {
        let randomPoint: CGPoint = CGPoint(x:CGFloat(arc4random()%320),y:CGFloat(arc4random()%568))
        return randomPoint
    }

    func randomColor() -> UIColor {
        let red = CGFloat(drand48())
        let green = CGFloat(drand48())
        let blue = CGFloat(drand48())
        return UIColor(red: red, green: green, blue: blue, alpha: 1.0)
    }

    func spawnEnemy() {
        let enemy: UIButton = UIButton(frame: CGRect(x: 160, y: 160, width: 150, height: 150))
        enemy.backgroundColor = randomColor()
        enemy.center = randomPoint()
        enemy.addTarget(self, action: Selector("buttonPushed:"), forControlEvents: UIControlEvents.TouchUpInside)
        self.view.addSubview(enemy)
    }

    func buttonPushed(sender : UIButton) {
        sender.backgroundColor = UIColor.blackColor()
        points = points + 1
        scoreLabel.textAlignment = .Center
        scoreLabel.text = "\(points)"
        scoreLabel.backgroundColor = UIColor.blackColor()
        if sender.frame.height < 50 || sender.frame.width < 50 {
            sender.frame = CGRectMake(sender.frame.origin.x, sender.frame.origin.y, 50, 50)
            sender.backgroundColor = self.randomColor()
            sender.center = self.randomPoint()
            return
        }
    }

    override func viewDidLoad() {
        super.viewDidLoad()



        NSTimer.scheduledTimerWithTimeInterval(0.75, target: self, selector: Selector("spawnEnemy"), userInfo: nil, repeats: true)

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()

    }

}

I can run and print just the sum function the second time I use it and I get the correct value. However, it will not overwrite the value in the corresponding row in the new data frame.

Answer 1

Your problem is probably that your Dimensions are factors but you expect them to be strings. Try

iptables -A INPUT -m mac --mac-source aa:bb:cc:dd:ee:ff -j DROP

I use stringsAsFactors = FALSE to prevent conversion to factors. I hate stringsAsFactors. First thing I learned from http://adv-r.had.co.nz/Data-structures.html was to use tableCols<- gsub( pattern = "^\\s", replacement = "", x = strsplit(as.character( tableCols ), ',' )[[1]] ) Table<- data.frame( Dimension = tableCols, All_users = numeric(24), Non_bounce = numeric(24), stringsAsFactors = FALSE ) on one's variables anytime one finds them misbehaving.

Another thing I notice is that strsplit on commas was converting

str()

to [Sessions], [_Pages/session] ... note the underscore at the front of the second column name is actually a space. I use gsub to strip the leading whitespace.

Conditional replace only functions on first row

1 个答案: