Re: [ANN] ClojuTRE 2015 conference in Tampere, Finland
Videos now available: https://www.youtube.com/playlist?list=PLetHPRQvX4a_tA9hGP935-OyLOYaRKpnj -- -jarppe On Monday, June 22, 2015 at 3:24:23 PM UTC+3, Mikko Heikkilä wrote: > > Dear fellow Clojurians, > > ClojuTRE 2015 will take place Friday, September 11th 2015, in Tampere, > Finland. > > ClojuTRE is a free Clojure conference organised by Metosin. The event has > single track, late start, short talks and an awesome after party for > networking, discussions and beer. We welcome both newbies and seasoned > Clojurists. Current known facts can be found at http://clojutre.org > > Registration via Eventbrite is open at https://clojutre-2015 > .eventbrite.com/ > > Call for Speakers is also open and can be found at > http://goo.gl/forms/hY1PXtUnm4 > > Last year was a blast, this one will be even moreso! Hope to see you in > ClojuTRE 2015! > > On behalf of the ClojuTRE team & Metosin, > > # Mikko > > -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Using function that returns unique keys in map literals causes an
I have a function that returns unique ID every time it is called. If I try
to create a new map with two entries, both having a unique
key generated by that function, I get IllegalArgumentException Duplicate
key exception. For example:
user=> *(def id (atom 0))*
user=> *(defn generate-id [] (swap! id inc))*
user=>
user=> *{(generate-id) "foo" (generate-id) "bar"}*
IllegalArgumentException Duplicate key: (generate-id)
clojure.lang.PersistentArrayMap.createWithCheck
(PersistentArrayMap.java:70)
How ever, it works just fine if I do it like this:
user=> *(let [id1 (generate-id) id2 (generate-id)] {id1 "foo" id2 "bar"})*
{3 "foo", 4 "bar"}
Is this a bug, or am I doing something wrong here?
I'm using Clojure 1.4.
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-jarppe
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Map literal with keys generated by function cause "Duplicate key" exception
I have a function that generatwed unique ID's, something like this:
(def k (atom 0))
(defn generate-id [] (swap! k inc))
and I try to use it like this:
{(generate-id) "foo"
(generate-id) "bar"}
How ever, I get
IllegalArgumentException Duplicate key: (generate-id)
clojure.lang.PersistentArrayMap.createWithCheck (PersistentArrayMap.java:70)
This works as expected.
(let [id1 (generate-id)
id2 (generate-id)]
{id1 "foo" id2 "bar})
Should I be able to call generate-id in map literal?
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Why I get IllegalArgumentException: No matching ctor found
Hi, I have this macro (complete file https://www.refheap.com/paste/7633): *(*defmacro defgreeter [greeter-name] *(*let [greeter *(*make-greeter*)*] `*(*do *(*defn ~greeter-name [user-name#] *(*~greeter user-name#*)**)**)**)**)* It works as expected when make-greeter is defined like this: *(*defn make-greeter [] *(*fn [user-name] *(*str "Hello, " user-name*)**)**)* I can use it like this: *(*defgreeter hello*)* *(*hello "jarppe"*)* How ever, if I change make-greeter to this I get IllegalArgumentException: *(*defn make-greeter [] *(*let [message "hello"] *(*fn [user-name] *(*str message ", " user-name*)**)**)**)* Interestingly, this does not work either: *(*defn make-greeter [] *(*constantly "what erver"*)**)* What am I missing? -- -jarppe -- 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: Why I get IllegalArgumentException: No matching ctor found
I think you are right, when ever the function returns a closure I get the exception. I think it should work with closures anyhow. -- -jarppe On Sunday, December 16, 2012 7:49:30 PM UTC+2, juan.facorro wrote: > > I think it has to do with the closure in the *fn *used when generating > the form in the macro. > >> >> -- 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: Why I get IllegalArgumentException: No matching ctor found
On Sunday, December 16, 2012 9:57:26 PM UTC+2, Jonathan Fischer Friberg wrote: > > I don't know why it doesn't work. However, changing defgreeter to the > following seems work. > > (defmacro defgreeter [greeter-name] > (let [greeter (make-greeter)] > `(def ~greeter-name ~greeter))) > > Might be a clue. :) > > Strange. That is definitely a clue, but for what? :) -- -jarppe -- 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
