Identifiable

Identifiable is a protocol in Swift that enforces types to include a unique identifier property. This identifier helps differentiate individual instances of the type from one another within collections or arrays, making it easier to handle, update, and manage specific instances.

Syntax

An Identifiable protocol is created like a regular protocol, followed by the Identifiable keyword:

protocol protocolName: Identifiable {
  // Protocol body
}

Example

Here, the Employee struct conforms to the Identifiable protocol by providing a unique id property using the UUID struct. This identifier can be used to distinguish instances of Employee in a collection or array, allowing for easy updates and deletions of specific employees.

struct Employee: Identifiable {
  let id = UUID()
  let firstName: String
  let lastName: String
  let isOnVacation: Bool
}