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//Encode params to be web friendly and return a string. Reference ->http://stackoverflow.com/a/27724627/6091482

extension String {
    
    /// Percent escapes values to be added to a URL query as specified in RFC 3986
    ///
    /// This percent-escapes all characters besides the alphanumeric character set and "-", ".", "_", and "~".
    ///
    /// http://www.ietf.org/rfc/rfc3986.txt
    ///

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func applicationDidReceiveMemoryWarning(application: UIApplication) {
        NSURLCache.sharedURLCache().removeAllCachedResponses()
    }

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class VerticalLayout: UIView {
    
    var yOffsets: [CGFloat] = []
    
    init(width: CGFloat) {
        super.init(frame: CGRectMake(0, 0, width, 0))
    }

    required init(coder aDecoder: NSCoder) {

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mutating func moveItem(fromIndex oldIndex: Index, toIndex newIndex: Index) {
        insert(removeAtIndex(oldIndex), atIndex: newIndex)
    }
    
var tags = [1,2,3,4,5,7782,25]
tags.moveItem(fromIndex: 2, toIndex: tags.count-1)

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    mutating func shuffle() {
        if count < 2 { return }
        for i in 0..<(count - 1) {
            let j = Int(arc4random_uniform(UInt32(count - i))) + i
            swap(&self[i], &self[j])
        }
    }
     var tags = [1,7782,25]
     tags.shuffle()