Re: format and printf can't be used with BigInt
As I said tweaking `format` to work on rationals could be too much, and i can restate that as "it is too much". Nevertheless, extending it to work on bigint doesn't seem to me really an edge case, given that i could get a bigint out of any function that uses autopromotion, so: (printf "%d" (autopromoting-factorial N)) would work only for small enough inputs. That's a bit surprising, so i keep my +1 while I learn cl-format. Then, if cl-format, is the "true" formatting function for clojure, why isn't it in core? On Jul 28, 2:48 pm, Chas Emerick wrote: > Tweaking `format` so that it accounts for all sorts of edge cases almost > certainly isn't going to happen, and would be a horrible kludge in any case. > > To extend Tom's point, if you really want a format that knows about all of > Clojure's scalars and data structures, cl-format is what you want, and it > comes with the language. If you don't want to learn about cl-format, then a > local wrapper around `format` that does whatever you like re: coercions to > standard Java numeric types would be ~3 lines. > > - Chas > > On Jul 28, 2011, at 7:52 AM, Andrea Tortorella wrote: > > > > > > > > > Thanks for your replies, > > > +1 for enhancing format > > > Maybe it could handle also rationals, converting them to doubles, but > > it could be to much. > > > On Jul 28, 9:47 am, Sean Corfield wrote: > >> On Wed, Jul 27, 2011 at 11:48 PM, Tom Faulhaber > >> wrote: > >>> FWIW, clojure.pprint.cl-format handles this fine in 1.3: > > >>> (cl-format nil "~d" 2N) > >>> => "2" > > >> Wow, I just spent the last 30 minutes reading Common Lisp the > >> Language, 2nd Ed, chapter 22 which describes how powerful and > >> mind-bending that is... -- 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: format and printf can't be used with BigInt
Thanks for your replies, +1 for enhancing format Maybe it could handle also rationals, converting them to doubles, but it could be to much. On Jul 28, 9:47 am, Sean Corfield wrote: > On Wed, Jul 27, 2011 at 11:48 PM, Tom Faulhaber > wrote: > > FWIW, clojure.pprint.cl-format handles this fine in 1.3: > > > (cl-format nil "~d" 2N) > > => "2" > > Wow, I just spent the last 30 minutes reading Common Lisp the > Language, 2nd Ed, chapter 22 which describes how powerful and > mind-bending that is... > -- > Sean A Corfield -- (904) 302-SEAN > An Architect's View --http://corfield.org/ > World Singles, LLC. --http://worldsingles.com/ > Railo Technologies, Inc. --http://www.getrailo.com/ > > "Perfection is the enemy of the good." > -- Gustave Flaubert, French realist novelist (1821-1880) -- 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
format and printf can't be used with BigInt
Hi everyone, I don't know where to post about bugs (if this is a bug). Anyway in clojure 1.3 with the new numerics: (format "%d" 2N) throws IllegalFormatConversionException, is it a bug? are there any workarounds? -- 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
Expanding symbols and expression in macros.
I'm not an expert in macros, and maybe this is a stupid question but i think there should be a general pattern for this. I' ve a function: (defn choose* [f & choices] "Applies f to one of the choices" . .) And this macro: (defmacro choose [[c choices] & body] `(choose* (fn [~c] ~@body) ~@choices)) Now if i call it with a literal sequence: (choose [x [:a :b :c]] (println x)) it correctly expands to: (choose* (fn [x] (println x)) :a :b :c) but if i have: (def y [:a :b :c]) (choose [x y] (println x)) it gives me an error: don't know how to create ISeq from symbol. with an expression: (choose [x (vec 2 3 4)] (println x)) it expands to: (choose* (fn [x] (println x)) vec 2 3 4) I knew it could not be that simple, and i also understand why i get theese expansions, but i don't get how to solve it. So what's the pattern for something like this, where you want to evaluate a symbol or an expression before expansion? Andrea -- 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
protocols metadata
Hi everyone, Reading the documentation I found that except for the docstring there is no way to tell that InternalReduce is a protocol, it's tagged simply as a var. Why don't add a :protocol true to the metadata for protocols like :macro true for macros? Andrea. -- 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: Protocols and Types
I'm not on my machine so i'cant experiment, i tried on #clojure with clojurebot but it's not 1.2, so i ask here, given that a protocol is represented as a simple map, which is the way to know if something is infact a protocol. Or suppose i want to add a function that works on protocols how can i do that? > > I thought that P had some kind of protocol type, that extends > > something like: > > As you found out, it doesn't. But then, you shouldn't care about how > protocols are represented in memory, as long as the documented API functions > work. > > Konrad. -- 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
Protocols and Types
Hi everyone, if I run this code: (defprotocol P (foo [x])) (deftype T [] P (foo [] "dummy")) (extends? P T) ;==> nil (satisfies? P T) ;==> nil (extenders P) ;==>nil are they not yet implemented? anyway when I run (type P) ;==> clojure.lang.PersistentArrayMap So the protocol is simply a map. I thought that P had some kind of protocol type, that extends something like: (defprotocol ProtocolProtocol (extends? [p t]) (extenders [p]) (satisfies? [p t])) (deftype Protocol [methods implementers] ProtocolProtocol (extends? [t] ...) (extenders [] ...) (satisfies? [t] ...)) Does it make any sense? -- 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: leiningen with latest clojure
Thanks for your answers. Yes, I'd like to use the new branch not the master one, anyway having this dependency in project.clj: [org.clojure/clojure "1.1.0-new-SNAPSHOT"] and using lein repl, I still have 1.1.0-alpha-SNAPSHOT at the repl. I added the spec to the dev-dependencies too, but still having no success. Andrea. On Dec 19, 3:56 am, "Alex Osborne" wrote: > defn writes: > > On Dec 18, 7:00 am, Andrea Tortorella wrote: > >> I'd like to ask how to use leiningen with the latest clojure > >> development new branch, is this possible? > > This will pull down 1.1.0-master-SNAPSHOT per the settings in > > project.clj which is as new as Dec. 18th, 16:00 at the time of writing > > this. > > I think Andrea meant the "new" branch rather than the "master" branch. > Just use "1.1.0-new-SNAPSHOT" as the version number for both clojure and > clojure-contrib and you should be okay. Just be aware that if you pull > in other Clojure libraries they may be compiled against "master" and > won't work against "new". This compatibility will hopefully be sorted > out in future as "slim jars" (not AOT-compiled) are probably going to > become the default in most tools. -- 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
leiningen with latest clojure
I'm new to the group, I've been following clojure development for a while, and I want to thank rich and you all for the fantastic work. I'd like to ask how to use leiningen with the latest clojure development new branch, is this possible? thanks, Andrea Tortorella -- 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
