Today’s code challenge is about being cool.
Problem Description:
A number is cool if it’s a multiple of 11 or if it is one more than a multiple of 11.
Return true if the given non-negative number is cool.
Test Cases:
Try this before you look at my solution.
Seriously – try it yourself.
Last chance.
Okay – here is my solution.
Here is the Ternary Operator again with a modulus operator used twice making it another one-liner.
Either condition would make the number a multiple of 11 or one more than a multiple of 11.
You can view my solution at the IBM Swift Sandbox.
[[Cocoa alloc] init]; 
Why do you use the ternary operator here? Everything before the question mark is already giving you the Bool you need 😉
By the way, if you would hypothetically need this often in your App, I’d even suggest the following which is more readable in the end:
extension Int {
var isCool: Bool {
return (self % 11 == 0) || (self % 11 == 1)
}
}
Usage:
22.isCool // true
23.isCool // true
24.isCool // true
Good catch. I like this form.