Re: Source code as metadata
On 31 Mar 2012, at 00:00, Cedric Greevey wrote: On Fri, Mar 30, 2012 at 6:17 PM, Lee Spector lspec...@hampshire.edu wrote: On Mar 30, 2012, at 5:11 PM, Cedric Greevey wrote: That opens a giant can of worms. How, for example, do we discover that (partial * 2) and #(* % 2) and (fn [x] (* 2 x)) and #(+ %1 %1) are all equal? Nevermind once we get into situations like #(reduce + (map (constantly 1) %) equals #(loop [n 0 s (seq %)] (if s (recur (inc n) (next s)) n) equals count. In fact that's an uncomputable can of worms. I was pretty sure it smelled like halting problem; thanks for confirming. :) Agreed, but I'm not suggesting determining whether two forms are computationally equivalent, just if two forms are literally equivalent. I know it wouldn't cover all cases, but cases like: (= (partial * 2) (partial * 2)) it would cover, which would seem like an improvement over the situation today. I suppose my bigger point is if code is data when thy isn't the code for functions available for analysis at runtime? -- 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
Re: What's the efficient functional way to computing the average of a sequence of numbers?
As an aside: Fingertrees are an interesting way to keep a collection that can efficiently compute means over its values, or a window of its values. https://gist.github.com/672592 -- Dave -- 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: Better ways to make time tansformations?
I'd suggest using java.util.concurrent.TimeUnit for example TimeUnit.MILLISECONDS.toDays(1234543211); or, since we're on Clojure list (.toDays java.util.concurrent.TimeUnit/MILLISECONDS 1234543211) For more complex tasks Joda Time is excellent choice. On Sat, Mar 31, 2012 at 4:51 AM, Goldritter marcus.goldritter.lind...@googlemail.com wrote: I wanted to track a program and set a maximum runtime for it in a way which is readable for the user. So I needed to write a time tansformation which I could use in my track function. First I wanted to use something like the 'defunits' macro from Let over Lambda from Doug Hoyte, but I'm not so fit in LISP and Clojure to write/understand it :(. So I use following two function: (defn unit-of-time [value unit] (unit-of-time value unit) returns the value in relation to the defined unit in seconds. Example: (unit-of-time 10 :minute) will return 600 and (unit-of-time 3 :millisecond) 3/1000. following Keywords are supported: :second :minute :houre :day :millisecond :microsecond :nanosecond (* value (case unit :second 1 :minute 60 :houre 3600 :day 86400 :millisecond 1/1000 :microsecond 1/100 :nanosecond 1/10))) (defn transform-time [value from to] (transform-time value from to) calculates the value from the unit 'from' to the unit 'to' (/ (unit-of-time value from) (unit-of-time 1 to))) The functions, but now I would know if there might be a better way to transform for example a time value given in minutes into the appropriate milli- or nanosecond value? -- 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 -- Petr Gladkikh -- 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
A simple (and naive) online whiteboard using Aleph ClojureScript
Hi everyone, I've been experimenting with ClojureScript and Aleph lately and made this sample application. It's a naive implementation of an online whiteboard. It's under a hundred line of code so it's a quick read: https://github.com/budu/board The Clojure web development story is getting better and better everyday, bit thanks to everyone involved! -- 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: A simple (and naive) online whiteboard using Aleph ClojureScript
On Saturday, March 31, 2012 7:35:03 PM UTC-4, jun lin wrote: Maybe you can create an online demo site? Yes good idea, I'll try to get it running on Heroku tomorrow. -- 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: Source code as metadata
I believe the latest code does capture closures properly. I haven't tested all kinds of crazy corner cases, but it does work for all my closures. From browsing git, it looks like the project.clj version hasn't been incremented in 7 months, and the fix for closures came in after that. If you're using serializable.fn from a maven repo, it is out of date, AFAICT. -jeff On Friday, March 30, 2012 3:07:53 PM UTC-4, Phil Hagelberg wrote: Nathan Matthews nathan.r.matth...@gmail.com writes: I wanted to serialise functions and send them over the network. The problem with serializable-fn is that it doesn't capture closures. It's designed to capture closures; if it doesn't that would be an (unsurprising) bug. -Phil -- 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
