On Fri, 25 Jun 2010 15:36:31 +0200
Michael Wood <esiot...@gmail.com> wrote:
> On 25 June 2010 12:27, Tim Robinson <tim.blacks...@gmail.com> wrote:
> > I tried Clojure via Githhub today.
> >
> > Anyone notice this bug that hadn't existed in Version 1.1
> >
> > user=> #{:item1 {:a "A" :b "B"} :item2 {:a "A" :b "B"}}
> > java.lang.IllegalArgumentException: Duplicate key: {:a "A", :b "B"}
>
> You're trying to put duplicate values into a set.
So? Most places, putting a value that's already in a set into the set
is a nop. Even in clojure that exhibits the above behavior:
user=> #{:a :a}
java.lang.IllegalArgumentException: Duplicate key: :a
user=> (set [:a :a])
#{:a}
user=> (conj #{:a} :a)
#{:a}
user=>
Apparently, duplicate keys in sets are only disallowed in set
literals. Arguably, that must be a mistake on the users part, but
it sure seems to clash with the behavior of sets elsewhere.
<mike
--
Mike Meyer <m...@mired.org> http://www.mired.org/consulting.html
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