There is a long discussion about how maps and sets should behave (throw
on dups or not) (see ''question about sets on the mailing list)....for
the moment try using the constructor fn hash-map rather than the map
literal...so basically do this:
(hash-map (generate-id) "foo"
(generate-id) "bar")
hope that helps
Jim
On 12/09/12 18:38, jarppe wrote:
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.
--
-jarppe
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