The input should be a sequence not a set, so call seq on the input before
passing it to this function.
Sorry if that was unclear from the docs. (For some inputs, it is more
forgiving, but when you call combinations with n=1, it calls distinct on
the set, and clojure.core's implementation of distinct doesn't work on
sets).
On Wed, Mar 23, 2016 at 3:45 PM, Matthias Grabmair <
matthias.grabm...@gmail.com> wrote:
> I am just using the math combinatorics library and spent some time
> debugging until I found out that combinations does not accept n=1. Is this
> intentional?
>
>
>
> *=> (clojure.math.combinatorics/combinations #{1 2 3 4} 1)*
>
>
>
> *UnsupportedOperationException nth not supported on this type:
> PersistentHashSet clojure.lang.RT.nthFrom (RT.java:933)*
>
>
> *expected: ((1)(2)(3)(4))*
>
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