I have following problem.
I have a set with different objects (maps). Normally the maps contains only
a key with a value which is a number or a collection.
For example like this:
(def testset #{ {:a 3 :b 5 :c 6}
{:a 3 :b 5 :c 7}
{:a 3 :b 5 :c 8}
{:a 3 :b 5 :g #{1 2 3 4 5}}}})
If I now use contains? with the map as key I get true, even when the order
of the number in the set is not the same as the order I used during the
"creation" of the map.
=> (contains? testset {:a 3 :b 5 :g #{1 2 3 4 5}})
true
=> (contains? testset {:a 3 :b 5 :g #{1 2 3 5 4}})
true
But if the map contains a function like in the following example It doe not
find the map.
=> (def testset #{ {:a 3 :b 5 :c 6}
{:a 3 :b 5 :c 7}
{:a 3 :b 5 :c 8}
{:a 3 :b 5 :g #{1 2 3 4 5}}
{:a 3 :h 5 :c #(+ 1 1)}})
=> (contains? testset {:a 3 :h 5 :c #(+ 1 1)})
false
I knew that
=> (= #(+ 1 1) #(+ 1 1))
false
because these functions are different objects, as I see on the hash values
=> (hash #(+ 1 1))
(hash #(+ 1 1))
1965115675
784046647
Now I wonder if it is possible to find a map in a set, which contains a
function as value.
Is this possible?
I tried it with ' too.
(def testset #{ {:a 3 :b 5 :c 6}
{:a 3 :b 5 :c 7}
{:a 3 :b 5 :c 8}
{:a 3 :b 5 :g #{1 2 3 4 5}}
{:a 3 :h 5 :c '#(+ 1 1)}})
And could use the contains? function
=> (contains? testset {:a 3 :h 5 :c '#(+ 1 1)})
true
But when I tried to access the value I got an Exception
=>(c: {:a 3 :h 5 :c '#(+ 1 1)})
RuntimeException Invalid token: c: clojure.lang.Util.runtimeException
(Util.java:219)
{:a 3, :c (fn* [] (+ 1 1)), :h 5}
The same with get
=> (get {:a 3 :h 5 :c '#(+ 1 1)} c:)
RuntimeException Invalid token: c: clojure.lang.Util.runtimeException
(Util.java:219)
RuntimeException Unmatched delimiter: ) clojure.lang.Util.runtimeException
(Util.java:219)
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