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Wayne Bishop
1,572 Pointswhat's the correct mathOperation signature?
Hi Folks;
Trying to determine the correct mathOperation method signature for this question. Here is the code I currently have working:
func differenceBetweenNumbers(a: Int, b:Int) -> (Int) {
return a - b
}
let myConst = differenceBetweenNumbers
func mathOperation(someOperationFunc:(Int, Int) -> (Int)) -> Int {
let results = someOperationFunc(5, 2)
return results
}
mathOperation(myConst)
/**
For this code challenge, let’s define a math operation as a function that
carries out some work on two integers and returns an integer as well. An
example is the function below, `differenceBetweenNumbers`, which takes two
integers and calculates the difference between the numbers. After calculating,
it returns the difference.
*/
func differenceBetweenNumbers(a: Int, b:Int) -> (Int) {
return a - b
}
// Enter your code below
func mathOperation(someOperationFunc:(Int, Int) -> (Int)) -> Int {
let results = someOperationFunc(5, 2)
return results
}
2 Answers
Chris Shaw
26,676 PointsHi Wayne,
As per the task and the math function example, we need to pass two values to the mathOperation function which is the same a/b parameters defined in the differenceBetweenNumbers function, also we don't need to store the resulting value to a constant within the mathOperation function as we can simply call the higher order function, in your case you've called it someOperationFunc, and return the value directly.
See the below.
func mathOperation(someOperationFunc: (Int, Int) -> Int, a: Int, b: Int) -> Int {
return someOperationFunc(a, b)
}
Hope that helps.
Wayne Bishop
1,572 PointsHi Chris;
Great, thanks for providing this clarification. Looks like I was close, but missed the wording about including the two additional parameters in the signature.
Regards;