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Swift 2.2 Random String Generation
// based on https://gist.github.com/samuel-mellert/20b3c99dec168255a046
// which is based on https://gist.github.com/szhernovoy/276e69eb90a0de84dd90
// Updated to work on Swift 2.2
func randomString(length: Int) -> String {
let charactersString = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
let charactersArray : [Character] = Array(charactersString.characters)
var string = ""
for _ in 0..<length {
string.append(charactersArray[Int(arc4random()) % charactersArray.count])
}
return string
}
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