Swift 元组到可选赋值

Swift 元组到可选赋值

swift
func divide(_ a: Int, _ b: Int) -> (Int, Int)? {
    if b == 0 {
        return nil
    } else {
        return (a / b, a % b)
    }
}
let result = divide(10, 3)
if let (quotient, remainder) = result {
    print("10 divided by 3 is \(quotient), with a remainder of \(remainder)")
} else {
    print("Cannot divide by 0")
}

swift
func fetchData() -> (data: String, error: Error)? {
    let data = "Some data"
    let error: Error? = nil
    // Simulating an error
    if error != nil {
        return nil
    } else {
        return (data, nil)
    }
}
if let (data, error) = fetchData() {
    print("Data: \(data)")
} else {
    print("Error occurred")
}