let container = try decoder.singleValueContainer()
let coordinates = try container.decode([Double].self)

// Data: [23.538399, -138.438982]
public init(from decoder: Decoder) throws {
	let container = try decoder.unkeyedContainer()
	let coordinates = try container.decode([Double].self)
	guard coordinates.count == 2 else {
		throw DecodingError.dataCorruptedError(in: container,
												   debugDescription: "Coordinate 값은 2개 값으로 이루어진 배열이어야 합니다.")
	}
	self.latitude = coordinates[0]
	self.longitude = coordinates[1]
}

// Data:
// {
//   "name": "S045 이창준"
//   "id": "1D723110-BD79-4839-9A30-1629BF49CFE8"
// }

struct SomeData: Decodable {
	var name: String?
	let id: UUID

	enum CodingKeys: String, CodingKey {
	case name = "title"
	case id = "_id"
	}
}

init(from decoder: Decoder) throws {
	let container = try decoder.container(keyedBy: CodingKeys.self)
	self.name = try container.decodeIfPresent(String.self, forKey: .name) ?? ""
	self.id = try container.decode(UUID.self, forKey: .id)
}

// Data: "S045 이창준"

struct OneData: Decodable {
	let name: String

	init(from decoder: Decoder) throws {
		let container = try decoder.singleValueContainer()
		self.name = try container.decode(String.self)
	}
}

// Data: ["S045 이창준", 0.45, true, 28]

struct UnkeyedData: Decodable {
	var name: String?
	var id: Double?
	var isCheckedIn: Bool?
	var age: Int?

	init(from decoder: Decoder) throws {
		var container = try decoder.unkeyedContainer()
		self.name = try container.decode(String?.self)
		self.id = try container.decode(Double?.self)
		self.isCheckedIn = try container.decode(Bool?.self)
		self.age = try container.decode(Int?.self)
	}
}

// Data: [23.538399, -138.438982]
public init(from decoder: Decoder) throws {
	let container = try decoder.unkeyedContainer()
	let coordinates = try container.decode([Double].self)
	guard coordinates.count == 2 else {
		throw DecodingError.dataCorruptedError(in: container,
												   debugDescription: "Coordinate 값은 2개 값으로 이루어진 배열이어야 합니다.")
	}
	self.latitude = coordinates[0]
	self.longitude = coordinates[1]
}

// Data: [23.538399, -138.438982]
public init(from decoder: Decoder) throws {
	var container = try decoder.unkeyedContainer()
	self.latitude = try container.decode(Double.self)
	self.longitude = try contianer.decode(Double.self)
}