Surely, because randomShuffle is re-ordering the elements
in-place, whereas randomCover is not.
Sorry, but that does not answer my question. If "in-place
shuffle" versus "function return value" was the only intended
difference, randomCover could as well look like this (simplified
to int[] case for expressiveness):
-----
int[] randomCover(int[] r, ref/*or not*/ Random rnd)
{
auto s = r.dup;
randomShuffle(s, rnd);
return s;
}
-----
However, there are ~70 lines in the implementation quite
different from just calling randomShuffle, presumably for some
purpose. And my question is, what is that purpose?
