u =. ~.@,
n =. ~.@(e.#[)
1 2 3 4 u 3 4 5 6
1 2 3 4 5 6
1 2 3 4 n 3 4 5 6
3 4
2009/7/16 Kip Murray <[email protected]>:
> The following is easy but interesting.
>
> A "set" is a numeric vector without repetitions. Provide definitions for the
> union u and intersection n of two sets:
>
> 1 2 3 4 u 3 4 5 6 NB. elements of one or the other
> 1 2 3 4 5 6
>
> 1 2 3 4 n 3 4 5 6 NB. common elements
> 3 4
>
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