Feb 3, 2022 · 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 …

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 …

Jul 3, 2014 · 98 Swift 4 & 5 To encode a parameter in URL I find using .alphanumerics character set the easiest option:

Mar 22, 2016 · TL;DR Swift 5.9 $0, $1, $2 are Closure 's first, second and third Shorthand Argument Names or, in other words, implicit parameter names, if you like. The shorthand …

(And in really old Swift versions, could append single elements, not just other collections of the same element type.) There's also insert(_:at:) for inserting at any index. If, say, you'd like a …

Apr 17, 2016 · 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 …

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 …

Why did I get “ Fatal error: Unexpectedly found nil while unwrapping an Optional value ”? In order to access an optional’s value (if it has one at all), you need to unwrap it. An optional value can …

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...