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iOS Swift Closures Closures and Closure Expressions Using Filter

Using Filter challenge [Closuers]

I don't know why I keep getting an error saying that I need to make sure I am using the filter function and assigning the odd numbers to a constant called oddNumbers which I think is what I am exactly doing.

let numbers = [Int](0...50)

// Enter your code below
func isOdd(Int) -> Bool {
  let oddNumbers += numbers.filter({$0 % 2 != 0})

1 Answer

I guess they want you to use a closure but you can pass it without it since they don't specifically ask for one.

Set a function isOdd that takes an Int and return the odd numbers. Use the filter function to create a new array containing only odd numbers. Assign this new array to a constant named oddNumbers.

func isOdd(number: Int) -> Bool {
return number % 2 != 0

let oddNumbers = numbers.filter(isOdd)