seq.sorted(by:)

// sorted(by:)
func sorted(
  by areInIncreasingOrder: (Self.Element, Self.Element) throws -> Bool
) rethrows -> [Self.Element]

用這個方法的優點是：Self.Element 不需要是 Comparable。

sort

// ⭐️ 1. sort a Sequence using `sorted(by:)` method.
//     - always returns an Array.
let sorted = todolist.sorted { a, b in a.date < b.date }

todolist

import Foundation  // Date

// todo item
struct TodoItem {
    let date: Date
    let item: String
}

// todo item samples
let todos = ["eat", "sleep", "play", "relax"]
let now = Date()
let nextyear = now.yearAfter

extension TodoItem {
    static let samples = (1...5).map{ _ in 
        TodoItem(
            date: .random(in: now...nextyear), 
            item: todos.randomElement()!
        )
    }
}

let todolist = TodoItem.samples

📗 參考

• Sorting Swift collections - Sundell ⭐️

📘 手冊

• Standard Lib ⟩ Collections ⟩ Sequence

  • sorted(by:)

👥 相關

• seq.sorted()