Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Closures in Swift 2 Building Standard Library Functions Using Filter

Posted by Jared Welch
Jared Welch
5,616 Points

Code Challenge

Is this not the right way to write this code?

filter.swift 
let numbers = [10,423,802,765,943,12,405,230,1348,128,237]

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

let oddNumbers = numbers.filter(isOdd)

1 Answer

David Papandrew
David Papandrew
8,386 Points
David Papandrew
David Papandrew
8,386 Points

The exercise wants you to use a closure to create the odd number list.

Here's how you do it (just take your isOdd function calculation and pass it via the closure):

let numbers = [10,423,802,765,943,12,405,230,1348,128,237]
let oddValues = numbers.filter { $0 % 2 != 0 }
Jared Welch
Jared Welch
5,616 Points

Okay i get it now! Thank You!