ios - Filter array of strings, including "like" condition

Question

If my main array is ["Hello","Bye","Halo"], and I'm searching for "lo", it will filter the array only to ["Hello", "Halo"].

This is what I've tried:

 let matchingTerms = filter(catalogNames) {
        $0.rangeOfString(self.txtField.text!, options: .CaseInsensitiveSearch) !=  nil
    }

It throws

Type of expression is ambiguous without more context

Any suggestions?

Answer 1

Use contains instead:

let arr = ["Hello","Bye","Halo"]
let filtered = arr.filter { $0.contains("lo") }
print(filtered)

Output

["Hello", "Halo"]

Thanks to @user3441734 for pointing out that functionality is of course only available when you import Foundation