combineLatestExample.swift

import RxSwift

let disposeBag = DisposeBag()

let xmenMovies = Observable.of("First Class", "Days of Future Past", "Apocalypse")
let imdbRatings = Observable.of(7.7, 8.0, 7.0)

Observable.combineLatest(xmenMovies, imdbRatings) { movie, rating in
    "\(movie) - \(rating)"
  }
  .subscribe(onNext: {
    print($0)
  })
  .disposed(by: disposeBag)

// Output:
// First Class - 7.7
// Days of Future Past - 7.7
// Days of Future Past - 8.0
// Apocalypse - 8.0
// Apocalypse - 7.0