Ok, working on it. Rich Hickey a écrit : > > On Mar 9, 5:04 am, Timothy Pratley <timothyprat...@gmail.com> wrote: > >> Hi Paul, >> >> >>> I actually mentioned the cycle function in my message, and that's what >>> I was using, but the original question came up because accessing the >>> nth item in a list takes linear rather than constant time. >>> >> Apologies for not reading your post carefully. Indeed I think your >> cyclic-vector solution is great. >> >> >>> I'd be interested to hear how what I was attempting violates the >>> spirit of clojure. I was trying to work within the bounds of an >>> existing abstraction, and to implement my changes in such a way as to >>> not break other things that consume that abstraction. >>> >> Interop with Java is a real strength of Clojure. But doing so is less >> useful for learning Clojure and more useful for learning Java. Feel >> free to pursue it, Java interop is certainly not wasted effort/ >> knowledge. It certainly doesn't violate the spirit of Clojure, my >> words were intended in relation to writing Euler solutions in a non- >> Java way. >> >> >>> Incidentally, I don't believe the error I'm getting from proxy has >>> anything to do with IPersistentVector being an interface, since you >>> can clearly do: >>> >>> (proxy [clojure.lang.IFn] []) >>> >> Indeed you can, but you've really just created an empty object: >> user=> ((proxy [clojure.lang.IFn] [])) >> java.lang.UnsupportedOperationException: invoke (NO_SOURCE_FILE:0) >> >> Now back to IPersistentVector for a moment: >> This class extends lots of interfaces. There is a name overlap between >> some of those Interfaces resulting in a very valid error "Duplicate >> method name&signature". Not a bug with proxy. >> >> > > I really don't know why you are trying to dissuade Paul in all this. > What he is trying to do is perfectly fine and it does in fact look > like a bug in proxy. It is not an error to inherit a same-sig method > from more than one interface, but proxy is probably generating more > than one stub method, which is the error. > > I'm prepping for my London QCon trip and don't have time to chase > this, but would appreciate it if a contributor could please file an > issue and look into this. > > Thanks, > > Rich > > > > > >
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