Swift 2.0 calendar components error

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As of Swift 2, NS_OPTIONS (such as NSCalendarOptions) are mapped to Swift as a OptionSetType
which offers a set-like interface. In particular, “no options”
can now be specified as [] instead of nil:

let components = cal.components(unit, fromDate: calcDesp!, toDate: calHoy!,
                               options: [])

See also Swift 2.0 – Binary Operator “|” cannot be applied to two UIUserNotificationType operands
and the recently added answers to How to create NS_OPTIONS-style bitmask enumerations in Swift? for more information.

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