Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

iOS Swift Basics (retired) Collections Modifying an Array

todo.insert("Learn iOS", atIndex:1) how do i have the wrong value here?

todo.insert("Learn iOS", atIndex:1) how do i have the wrong value here?

arrays.swift
var todo = ["Learn Swift", "Build App", "Deploy App"]
todo += ["Debug App", "Fix Bugs"]
todo.removeAtIndex(1)
let item = todo.removeAtIndex(1)
todo.insert("Learn iOS", atIndex:1)

1 Answer

Chris Shaw
Chris Shaw
26,650 Points

Hi Brooks,

This challenge can be a bit tricky especially with how the previous video is explained, however. The only issue with the code you have above is you've called removeAtIndex twice when it only needs to be called once. As the challenge asks, it requires you to remove the item Deploy App from the array which would actually be index 2 as array's always start from an index of zero.

var todo = ["Learn Swift", "Build App", "Deploy App"]
todo += ["Debug App", "Fix Bugs"]
let item = todo.removeAtIndex(2)
todo.insert("Learn iOS", atIndex:1)

Aside from that you were pretty close.

Happy coding!