Also, why does this work:
user=> (assoc [:a :b :c :d] 2 :q)
[:a :b :q :d]

And this doesn't:
user=> (dissoc [:a :b :c :d] 2)
#<CompilerException java.lang.ClassCastException:
clojure.lang.PersistentVector cannot be cast to
clojure.lang.IPersistentMap (NO_SOURCE_FILE:286)>

Annoying.


On Apr 27, 1:24 pm, Sean Devlin <francoisdev...@gmail.com> wrote:
> Is there a built in to insert a value into an "indexed" seq?
>
> For example:
>
> user=> (insert [:a :b :c :d] 2 :q)
> (:a :b :q :c :d)
>
> Not sure if I'm missing something simple...
> Sean
>
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