> On May 30, 2016, at 2:19 PM, Frédéric Blondiau via swift-evolution > <swift-evolution@swift.org> wrote: > > I personally never found that this “$n” convention was “Swift-like”... but > it’s true that a “$n” is easier to spot than a “.n”, and I got used to also. > > However, I realised how much this was disturbing for newcomers, when > explaining closure shorthand argument names to a classroom of computer > science students (aged 21) discovering Swift. > > The feedback some gave me, during the course, was quite surprisingly strong > and negative about this “$n” convention. This convinced me to write this > proposal : for newcomers, the “$n” zero-based is something wrong. > > I understand that association between tuples and function parameters in Swift > is to be removed, but, in this case, as we have no parameters at all, I > thought this was a distinct enough situation. > > As suggested, considering this is a kind of compiler magic, using #0, #1 > instead, may indeed be a better alternative. > > I’m still waiting some feedback before writing an official proposal.
I really don't see a pressing need to change this. Zero-based counting is used in Swift arrays. I don't think the $-prefix is either superior or inferior to alternatives such as # or %, and has precedent in unix shell programming. Swift closures allow you to easily introduce meaningful names by using a closure signature with a parameter clause. -- E _______________________________________________ swift-evolution mailing list swift-evolution@swift.org https://lists.swift.org/mailman/listinfo/swift-evolution
