I'd also like to know if there is a way to construct a Map or Set that
differentiates lists and vectors.
To try to answer your question, Juan, I think it's because of the
`clojure.core/=` semantics. From the docstring: "compares numbers and
collections in a type-independent manner." So,
user>
I think quoting plays a part here:
Clojure 1.3.0
user=> {(list 1 2 3) :list [1 2 3] :vec}
IllegalArgumentException Duplicate key: (1 2 3)
clojure.lang.PersistentArrayMap.createWithCheck (PersistentArrayMap.java:70)
Stuart
On 3 April 2012 22:41, JuanManuel Gimeno Illa wrote:
> More examples in
More examples in clojure 1.3.0:
user=> {[1 2 3] :vector '(1 2 3) :list}
{[1 2 3] :list}
but
user=> #{[1 2 3] (1 2 3)}
IllegalArgumentException Duplicate key: (1 2 3)
clojure.lang.PersistentHashSet.createWithCheck (PersistentHashSet.java:68)
... anyone has an explanation?
Juan Manuel
On Tue
Another interesting fact is that:
Clojure 1.2.1
user=> {'(1) :list [1] :vector}
java.lang.IllegalArgumentException: Duplicate key: (1) (NO_SOURCE_FILE:0)
Clojure 1.3.0
user=> {'(1) :list [1] :vector}
{(1) :vector}
Clojure 1.4.0-beta1
user=> {'(1) :list [1] :vector}
{(1) :vector}
...but I don't
Playing with some problems of 4clojure, I wanted to make a map which, for
each empty collection, returns a keyword. But it seems that it is
impossible to have both an empty list and an empty vector in the same map.
user=> {() :list}
{() :list}
user=> {() :list [] :vector}
IllegalArgumentExceptio
