Could we utilize Optional along with Tuple?

Question

I try to use all I have learned so far in this course to do this exercise; Just out of curiosity, could we combine Optional with Tuple when creating a function??   Is it the "right way" in term of coding.  My code for this exercise is followed...
func divisbleNumber (#firstNum: Int, #secondNum: Int) -> (Bool, String)? {
    if firstNum % secondNum == 0 {
        return (true, "(firstNum) is divisble by (secondNum)");
    }else {
        return nil;
    }
}
if let result = divisbleNumber(firstNum: 10, secondNum: 5) {
    println("Divisible")
} else {
    println("Not Divisible")
}

Alex Benyon · Answer

3 months after the question I know,  but surely the answer to the David's question is No, this is not 'good' code as you have recreated the code that you went to all the trouble to eliminate. The way you have written the 'if let' statement it doesn't call the strings from the tuple in the function ( you can check this by changing them, the console output wont change)
(Also you missed the backslashes to interpolate the strings in the function - although that might be a result of pasting into the question box without formatting into a code block)
To achieve what you are aiming to, the code should look like this:
```swift
func divisbleNumber (#firstNum: Int, #secondNum: Int) -> (Bool, String)? {
 if firstNum % secondNum == 0 { 
return (true, "(firstNum) is divisble by (secondNum)"); 
}else { return nil; }
 }
if let result = divisbleNumber(firstNum: 10, secondNum: 5){
 println("(result)")
}
```

Jhoan Arango · Answer

Well, it seems that the code you have does work. One thing I’ve learned is, if the problem you are trying to solve, is solved no matter how you write the code, then it’s good.

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David Lin

David Lin

Could we utilize Optional along with Tuple?

2 Answers

Jhoan Arango

Jhoan Arango

Alex Benyon

Alex Benyon