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Add IndexedRandom::choose_multiple_array, index::sample_array #1453

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merged 7 commits into from
Jun 4, 2024

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@dhardy dhardy commented May 21, 2024

  • Added a CHANGELOG.md entry

Summary

#982 requests the addition of choose_multiple_fill, but for the given use-case (fixed-length output), an array appears more appropriate.

Details

This requires additional code in rand::seq::index. Under the assumption that the array length is small, it is reasonable to skip the algorithm-selection-logic and always use Floyd's alg for the new fn.

Additional

Two new modules under rand::seq for cleaner code organisation.

@dhardy dhardy requested a review from newpavlov May 30, 2024 08:45
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Maybe it's also worth to add (in a separate PR) borrowing choose methods?

@dhardy dhardy merged commit ca9e119 into rust-random:master Jun 4, 2024
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dhardy commented Jun 4, 2024

@newpavlov what do you mean? IndexedRandom::choose already borrows &self.

Do you mean choose_and_remove? If so, it will have more restrictions on the containing type than Index<usize> (or mut variant); e.g. it could be implemented on a Vec but would be inefficient.

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Never mind, I misunderstood the API.

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2 participants