object SeqUtil
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- def randomSubsetShuffle[A](xs: IndexedSeq[A], size: Int, random: Random): Seq[A]
Picks a random subset of indices of size
sizefromxsand returns a random permutation of the elements at these indices.Picks a random subset of indices of size
sizefromxsand returns a random permutation of the elements at these indices. Implements the Fisher-Yates shuffle (https://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle) with a separate output array.Note: The inside-out version of Fisher-Yates would not have to modify the input sequence, but doesn't work for picking a proper subset because it would be equivalent to shuffling only the prefix of length size.
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