Added randomOfLength initializer
Added randomOfLength initializer
SwifterSwift/SwifterSwift,LucianoPAlmeida/SwifterSwift,omaralbeik/SwifterSwift,LucianoPAlmeida/SwifterSwift,SD10/SwifterSwift,omaralbeik/SwifterSwift,SD10/SwifterSwift,tache/SwifterSwift,SD10/SwifterSwift,tache/SwifterSwift,SwifterSwift/SwifterSwift,SwifterSwift/SwifterSwift