The question of what purpose in serves has been well-answered by other users here; in summary: in is a keyword defined in the Swift closure syntax as a separator between the function type and the function body in a closure: { / parameters and type / in / function body / } But for those who might be wondering "but why specifically the keyword in?", here's a bit of history shared by Joe Groff ...
77 I'm bridging the sync/async worlds in Swift and doing incremental adoption of async/await. I'm trying to invoke an async function that returns a value from a non async function. I understand that explicit use of Task is the way to do that, as described, for instance, here. The example doesn't really fit as that task doesn't return a value.
8 Swift’s nil is not the same as nil in Objective-C. In Objective-C, nil is a pointer to a non-existent object. In Swift, nil is not a pointer—it is the absence of a value of a certain type. Optionals of any type can be set to nil, not just object types. NULL has no equivalent in Swift. nil is also called nil in Swift Nil has no equivalent ...
With Swift 5, Foundation offers many ways to get the hour value from a Date object. According to your needs, you may choose one of the four following Playground code snippets.
I have an IOS app with an Azure back-end, and would like to log certain events, like logins and which versions of the app users are running. How can I return the version and build number using Swift?
The Swift Docs on Control Flow explain the idea behind that: Using a guard statement for requirements improves the readability of your code, compared to doing the same check with an if statement.
With the release of Swift 3.0 being available for Mac OS and Windows, does this mean you can compile and run Swift code on Windows? If so what compiler do you use for Windows?
I am looking for a way to replace characters in a Swift String. In this example String: "This is my string" I would like to replace the spaces, " ", with "+" to end up...
I need to read and write data to/from a text file, but I haven't been able to figure out how. I found this sample code in the Swift's iBook, but I still don't know how to write or read data. import...
