AI-generated Key Takeaways
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          Periodrepresents the operational hours of a place, containing open and optional close events.
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          If a place is open 24 hours, the closeevent will be nil, and theopenevent will have a time of "0000".
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          Periodconforms toCustomStringConvertible,Equatable, andHashableprotocols for description, comparison, and hashing functionalities.
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          The descriptionproperty provides a textual representation of thePeriodinstance.
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          hash(into:)and the deprecatedhashValueare used for hashing in accordance with theHashableprotocol.
Period
struct Periodextension Period : Copyable, CustomStringConvertible, Equatable, Escapable, Hashable, SendableA type representing a period of time where the place is operating for a Place.
Contains an open Event and an optional close Event. The close event will be nil if the
period is open 24hrs.
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                  Returns a Boolean value indicating whether two values are equal. Equality is the inverse of inequality. For any values aandb,a == bimplies thata != bisfalse.DeclarationSwift static func == (lhs: Period, rhs: Period) -> BoolParameterslhsA value to compare. rhsAnother value to compare. 
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                  The close event of this period. Can be nil if period is open 24hrs. DeclarationSwift let close: Event?
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                  A textual representation of this instance. Calling this property directly is discouraged. Instead, convert an instance of any type to a string by using the String(describing:)initializer. This initializer works with any type, and uses the customdescriptionproperty for types that conform toCustomStringConvertible:struct Point: CustomStringConvertible { let x: Int, y: Int var description: String { return "(\(x), \(y))" } } let p = Point(x: 21, y: 30) let s = String(describing: p) print(s) // Prints "(21, 30)"The conversion of pto a string in the assignment tosuses thePointtype’sdescriptionproperty.DeclarationSwift var description: String { get }
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                  Hashes the essential components of this value by feeding them into the given hasher. Implement this method to conform to the Hashableprotocol. The components used for hashing must be the same as the components compared in your type’s==operator implementation. Callhasher.combine(_:)with each of these components.Important In your implementation of hash(into:), don’t callfinalize()on thehasherinstance provided, or replace it with a different instance. Doing so may become a compile-time error in the future.DeclarationSwift func hash(into hasher: inout Hasher)
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                  The hash value. Hash values are not guaranteed to be equal across different executions of your program. Do not save hash values to use during a future execution. Important hashValueis deprecated as aHashablerequirement. To conform toHashable, implement thehash(into:)requirement instead. The compiler provides an implementation forhashValuefor you.DeclarationSwift var hashValue: Int { get }
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                  The open event of this period. Each Periodis guaranteed to have an open event. If the period is representing open 24hrs, it will only have the open Event with time as “0000”.DeclarationSwift let open: Event