(Swift) sorted()

• 배열의 Comparable protocol*  요소들을 sorting하는 메소드
  • Comparable protocol :
    비교연산자 (<. <=, >= and >) 로 비교 가능한 요소
• default order : ascending order ( < )

 

예시1)

// ascending
let dateString: String = ["2022-03-22", "2022-03-02", "2022-03-03"]
let sortedDateString = dateString.sorted() // default: <
print(sortedDateString) // ["2022-03-02", "2022-03-03", "2022-03-22"]

// descending
let descendingDateString = dateString.sorted(by: >)
print(descendingDateString) // ["2022-03-22", "2022-03-03", "2022-03-02"]

 

 

 

예시2) 

struct Chat {
	let name: String
    let date: String
}

extension Chat {
	static let list: [Chat] = [
    	Chat(name: "Ablin", date: "2024-01-01"),
        Chat(name: "Abigail", date: "2024-01-02"),
        Chat(name: "Sam", date: "2024-01-03"),
    ]
}

var chatList: [Chat] = Chat.list
chatList = chatList.sorted(by: { chat1, chat2 in
	return chat1.date > chat2.date // 조건문 descending order
}
// 결과
// [Chat(name: "Sam", date: "2024-01-03"), Chat(name: "Abigail", date: "2024-01-02"), Chat(name: "Ablin", date: "2024-01-01")]

 

 

 

 

https://developer.apple.com/documentation/swift/array/sorted()

sorted() | Apple Developer Documentation