78. 배열에서 문자열 대소문자 변환하기

import Foundation

func solution(_ strArr:[String]) -> [String] {
    
    var answer : [String] = []
    
    answer = strArr
    
    for i in answer.indices{
        if i % 2 == 0 {
            answer[i] = answer[i].lowercased()
        } else {
            answer[i] = answer[i].uppercased()
        }
    }
    
    return answer
}

import Foundation

func solution(_ strArr:[String]) -> [String] {
    return strArr.enumerated().map { $0.offset % 2 != 0 ? $0.element.uppercased() : $0.element.lowercased() }
}
//
func solution(_ strArr: [String]) -> [String] { strArr.indices.map { ($0 % 2 == 0) ? strArr[$0].lowercased() : strArr[$0].uppercased() } }
//
import Foundation

func solution(_ strArr:[String]) -> [String] {
    return strArr.enumerated().map { $0.offset % 2 == 0 ? $0.element.lowercased() : $0.element.uppercased() }
}