Swift Language Functional Programming in Swift Extracting a list of names from a list of Person(s)
Example
Given a Person struct
struct Person {
let name: String
let birthYear: Int?
}
and an Array of Person(s)
let persons = [
Person(name: "Walter White", birthYear: 1959),
Person(name: "Jesse Pinkman", birthYear: 1984),
Person(name: "Skyler White", birthYear: 1970),
Person(name: "Saul Goodman", birthYear: nil)
]
we can retrieve an array of String containing the name property of each Person.
let names = persons.map { $0.name }
// ["Walter White", "Jesse Pinkman", "Skyler White", "Saul Goodman"]
