さっきの https://anoqode.com/question?id=9dd1d9f9-bba9-4cde-b331-1ab78b155b01 ですけど、RawRepresentableなstructを噛ませておくと、失敗した文字列も失わずに済むので好きです #swiftzoomin #CodePiece

CodePiece.rb

let jsonData = """
    [
        "https://www.apple.com",
        "https://swift.org/blog/",
        "https://github.com/apple/swift/releases/tag/swift 5.2.4-RELEASE"
    ]
    """
    .data(using: .utf8)!
struct SafeURL: RawRepresentable, Decodable {
    let rawValue: String
    var url: URL? { URL(string: rawValue) }
}
let urls = try JSONDecoder().decode([SafeURL].self, from: jsonData)
urls.map(\.url)
// [https://www.apple.com, https://swift.org/blog/, nil]