How do I design generic functions and types with constraints in Swift?

In Swift, you can design generic functions and types by using generic parameters and constraints. This allows you to write flexible and reusable code while ensuring that the types used conform to certain requirements.

Here's an example of a generic function that calculates the maximum value from an array of elements that conform to the Comparable protocol:

func findMax(from array: [T]) -> T? { guard !array.isEmpty else { return nil } var currentMax = array[0] for element in array { if element > currentMax { currentMax = element } } return currentMax } // Usage let numbers = [3, 5, 2, 8, 1] if let maxNumber = findMax(from: numbers) { print("Maximum number is \(maxNumber)") }

In this function, T is a generic type that must conform to the Comparable protocol. This way, we ensure that the elements in the array can be compared to determine the maximum value.


Swift Generics Functions Type Constraints Comparable

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