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iOS Swift Closures Functions as First Class Citizens Higher Order Functions

Hassan Khazaal
Hassan Khazaal
2,441 Points
Posted by Hassan Khazaal
Hassan Khazaal
2,441 Points

i didnt even understand what this test want !

im trying to understand what this question want me to do i tried every single step on the course it keeps saying the parameters and the function name and the return are wrong !!

higherOrderFunctions.swift 
/** 
  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() -> (Int) -> () {
  func operation(xy: Int, yx: Int) {
    println("the number is \(xy) - \(yx)")
  }
  return operation
}

1 Answer

Jhoan Arango
Jhoan Arango
14,575 Points
Jhoan Arango
Jhoan Arango
14,575 Points

Hello Hassan:

I wrote an answer to someone who had the same issue as you, if you want to go read my answer there, I am sure you will find it useful, and it will help you move on with your challenge.

Click Here to go to the answer.

Good luck