Hello. I was wondering if someone could point me to an example of a good use case for Swift’s key path syntax. I see them more often now in SwiftUI and Combine, but typically, you also need to provide an object with the key path. Why use a key path if you have an object and could simply use dot syntax to read/write to the property?
John Sundell explains it well in his article:
“Key paths essentially let us reference any instance property as a separate value. As such, they can be passed around, used in expressions, and enable a piece of code to get or set a property without actually knowing which exact property its working with.”
Also have a look at pointfree.co’s playgrounds on functional getters and setters. PointFree has many episodes that show key path usage extensively as well as many other interesting topics.