Random

extension String {
	static func random(length: Int) -> String {
		let base = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
		var randomString: String = ""
		
		for _ in 0..<length {
			let randomValue = Int.random(from: 0, to: base.characters.count)
			randomString.append(base[base.startIndex.advancedBy(randomValue)])
		}
		
		return randomString
	}
}

extension Int {
	static func random(from from: Int, to: Int) -> Int {
		return from + (Int(arc4random()) % (to - from))
	}
}