a question about the definiton of the variable arity function in "Clojure: A Dynamic Programming Language for the JVM," by Rich Hickey
On slide 20 of the talk "Clojure: A Dynamic Programming Language for the JVM" (see ftp://lispnyc.org/meeting-assets/2007-11-13_clojure/clojuretalk.pdf), by Rich Hickey, the following function and evaluation results are defined: >(defn argcount > ([] 0) > ([x] 1) > ([x y] 2) > ([x y & more] > (+ (thisfn x y) (count more > >(argcount 1 2 3 4 5) >-> 5 However, when I evaluate this function in the REPL, the following error is returned: >java.lang.Exception: Unable to resolve symbol: thisfn in this context >(NO_SOURCE_FILE:6) > [Thrown class clojure.lang.Compiler$CompilerException] However, no definition is given for "thisfn" in the talk. Forgive me if I am missing something very obvious, but does anybody know where I can find the definition of "thisfn"? -- Benjamin L. Russell -- Benjamin L. Russell / DekuDekuplex at Yahoo dot com http://dekudekuplex.wordpress.com/ Translator/Interpreter / Mobile: +011 81 80-3603-6725 "Furuike ya, kawazu tobikomu mizu no oto." -- Matsuo Basho^ --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
How difficult would creating a collaborative multi-user online virtual world application be in Clojure?
One question that has been coming up at the back of my mind for the past several weeks has been how difficult would it be to create a collaborative multi-user online virtual world application in a semi-functional programming language, such as Clojure. More specifically, last August, I came across a very interesting application called Croquet (see http://www.opencroquet.org/index.php/Main_Page), which happens to be based on Squeak (see http://www.squeak.org/), a dialect of Smalltalk. Croquet, in turn, provides the basis for Cobalt (see http://www.duke.edu/~julian/Cobalt/Home.html), a "virtual workspace browser and construction toolkit for accessing, creating, and publishing hyperlinked multi-user virtual environments" (according to the home page for that project). What struck me as especially interesting was how Croquet allows multiple users to collaborate together in a multi-user online virtual world in software development and other collaborative projects. As one application, the video clip on the upper-right-hand corner of the above-mentioned Croquet home page illustrates how a user can, by writing code from inside the application, create on-the-fly additional virtual environments, which can then be entered by either the programmer or other programmers. Other applications (shown in other video clips on the "Screenshots/Videos" page (see http://www.opencroquet.org/index.php/Screenshots/Videos) show alternative applications that include text-based annotations, a 3D spreadsheet, and writing a conventional blog from within a virtual world. Unfortunately, Smalltalk is an object-oriented language. If possible, I would like to see something similar in a more functional programming language such as Clojure. Does anybody know whether duplicating this project in Clojure would be feasible? -- Benjamin L. Russell -- Benjamin L. Russell / DekuDekuplex at Yahoo dot com http://dekudekuplex.wordpress.com/ Translator/Interpreter / Mobile: +011 81 80-3603-6725 "Furuike ya, kawazu tobikomu mizu no oto." -- Matsuo Basho^ -- Benjamin L. Russell / DekuDekuplex at Yahoo dot com http://dekudekuplex.wordpress.com/ Translator/Interpreter / Mobile: +011 81 80-3603-6725 "Furuike ya, kawazu tobikomu mizu no oto." -- Matsuo Basho^ --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~--~~~~--~~--~--~---
Re: Reminder: IEEE Software Issue on "Multiparadigm Programming"
Greetings, Mr. Wampler, Actually, I was thinking about doing a short cross-comparison of the advantages and disadvantages of Mozart/Oz and Scheme in multiparadigm programming in the textbooks SICP and CTM; however, currently, because of the economic depression, my company has been forced to downsize, and I am very busy in searching for more employment. Therefore, I have very little time. Is there any way that I could contribute to a future issue on this topic? I probably won't have much time to write until I find additional work. Sincerely yours, Benjamin L. Russell --- On Sun, 1/24/10, Dean Wampler wrote: > From: Dean Wampler > Subject: Reminder: IEEE Software Issue on "Multiparadigm Programming" > To: "Dean Wampler" > Date: Sunday, January 24, 2010, 2:59 AM > Hi, > all, > Apologies for duplicate notices, but I wanted to > remind you that the 1 Feb deadline is approaching for > submissions for our special issue of IEEE Software on > "Multiparadigm Programming". > > http://www.computer.org/portal/web/computingnow/swcfp5 > If you're interested, but you need more > time, let me know. I'll see what I can do ;) Also, we > need reviewers as well as submitters. Thanks for those who > expressed interest in submitting and reviewing > already. > > Yours,Dean > > -- > Dean Wampler > coauthor of "Programming Scala" (O'Reilly) > - http://programmingscala.com > > > twitter: @deanwampler, @chicagoscala > > blog: http://blog.polyglotprogramming.com > Chicago-Area Scala Enthusiasts (CASE): > - http://groups.google.com/group/chicagoscala > > > - http://www.meetup.com/chicagoscala/ > (Meetings) > http://www.linkedin.com/in/deanwampler > > http://www.polyglotprogramming.com > > http://aquarium.rubyforge.org > http://www.contract4j.org > > > > > -- > > You received this message because you are subscribed to the > Google > > Groups "Clojure" group. > > To post to this group, send email to > clojure@googlegroups.com > > Note that posts from new members are moderated - please be > patient with your first post. > > To unsubscribe from this group, send email to > > clojure+unsubscr...@googlegroups.com > > For more options, visit this group at > > http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
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