Swift itself is quite easy to learn, and you don't actually have to do any functional programming in it if you don't know how to do so. I'll bet most people wri

Swift itself is quite easy to learn, and you don't actually have to do any functional programming in it if you don't know how to do so. I'll bet most people writing in Swift are doing little more than they would have done in Objective-C since it fully supports the OO paradigm. Over time, more and more will adopt some of the neat things you can do with this first-class functions.