This is not a good way to check whether an *arbitrary* element is in a set:
user=> (contains? #{nil} nil)
true
user=> (#{nil} nil)
nil
On Wed, Dec 4, 2013 at 3:35 AM, László Török <ltoro...@gmail.com> wrote:
> Hi,
>
> contains? is for checking whether a data structure contains the respective
> key.
>
> A more idiomatic way to check whether an element is in the set is
>
> (#{1 2 3} 1) ;; => returns 1
> (#{1 2 3} 0) ;; => returns nil
>
> works for (transient #{1 2 3}) too.
>
> Las
>
>
>
> 2013/12/4 Burt <burkhardt.r...@googlemail.com>
>
>> Does contains? and get not work with transient sets?
>>
>> Examples:
>> (contains? #{1 2 3} 1)
>> ; => true
>> (contains? (transient #{1 2 3}) 1)
>> ; => IllegalArgumentException contains? not supported on type:
>> clojure.lang.PersistentHashSet$TransientHashSet
>> (get #{1 2 3} 1)
>> ; => 1
>> (get (transient #{1 2 3}) 1)
>> ; => nil
>>
>> How can I check whether an element is contained in a transient set?
>>
>>
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>
>
>
> --
> László Török
>
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--
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