retry VS swift-algorithm-club

For example, the retry package seems to do what you'd like. Go see how it's @retry decorator works and pick up any tips that you can.

There is in fact a library that implements this logic for you with lots of options: https://github.com/invl/retry

Don't assume your api calls will succeed. Wrap you api calls in something that will retry them with a backoff; There are hundreds of reasons out of your control a call can fail. (check out https://github.com/invl/retry or use it as a great use case for an intro to decorators)

Data Structures & Algorithms in Swift by Kodeco is not bad, also there is an algorithms club on github (https://github.com/kodecocodes/swift-algorithm-club).

Resources I think i'd use for interview questions and algods in Swift: https://github.com/kodecocodes/swift-algorithm-club

You take one month, learn the algorithms (there are in general not that many, even fewer if you only considering the ones that are regularly referenced in interviews), then you'll pass any interview, at least the first phase. swift-algorithm-club is a good starting point.

Also you may want to look at this for real world source in Swift. https://github.com/raywenderlich/swift-algorithm-club

There is the Swift Algorithm Club from Ray Wenderlich.

You probably want to populate a Trie. You can find a completed implementation at this link

If you need a project to work on, try implementing some algorithms in Swift, each based on a description of how that algorithm works. You can use projects like Swift Algorithm Club for ideas.