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 Swift Basics (retired) Collections What is an Array?

Posted by Alfredo Robledo
Alfredo Robledo
561 Points

During the array challenge it wont preview anything. I dont know what i did wrong. It only says Bummer try again.

i wrote

println("(todo.count)")

arrays.swift 
var todo: [String] = ["Learn Swift","Build App","Deploy App"]

println("\(todo.count)")

2 Answers

J.D. Sandifer
J.D. Sandifer
18,813 Points
J.D. Sandifer
J.D. Sandifer
18,813 Points

It looks like you found you're problem, but here are a couple additional ideas to make your code more efficient - that's a lot of what makes "good" code:

var todo = ["Learn Swift","Build App","Deploy App"]     // removed [String] type declaration because it's not needed

println(todo.count)     // the println() command can take Int's directly
                        // no need for string interpolation
Jason Jones
Jason Jones
5,917 Points
Jason Jones
Jason Jones
5,917 Points

Congrats on sorting this out on your own! Always a nice feeling. I'd agree with JD on both of his observations. Both may seem like 'shortcuts' but they make for more succinct, readable code.