<p>In <a href="https://github.com/mlpack/mlpack/pull/699#discussion_r69033550">src/mlpack/core/tree/rectangle_tree/minimal_coverage_sweep.hpp</a>:</p>
<pre style='color:#555'>> + * @tparam SplitPolicy The class that provides rules for inserting children of
> + * a node that is being split into two new subtrees.
> + */
> +template<typename SplitPolicy>
> +class MinimalCoverageSweep
> +{
> + private:
> + /**
> + * Class to allow for faster sorting.
> + */
> + template<typename ElemType>
> + struct SortStruct
> + {
> + ElemType d;
> + int n;
> + };
</pre>
<p>No, I haven't. I think these approaches are equal.</p>
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