Chaining optionals with map and flatMap
Basics article available: OptionalsUsing map() and flatMap() on optionals you can chain multiple operations without having to use lengthy if lets or guards:
// BEFORE
guard let string = argument(at: 1) else {
return
}
guard let url = URL(string: string) else {
return
}
handle(url)
// AFTER
argument(at: 1).flatMap(URL.init).map(handle)
For two weeks, many websites around the Swift community are featuring indie developers who have been financially impacted by the current pandemic. If you can, please help support these indies by downloading their apps. Today’s app is...
Working Copy: My favorite Git client for iOS. Working Copy lets me access all of my Git repositories while on the go, which lets me update my projects, check out files, and much more. Made by Anders Borum from Copenhagen.