Minmax set (prev "Add {min,max}_set(_by{_key)?)? functions") #613
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The function min_set returns a Vec of all the minimum values. All variants for max and with key extraction and comparison functions are added also. Since the functions need to return an unknown number of values and the values are not known until the iterator is finished, the function needs to allocate memory. Therefore Vec is used for returning the values.
…alOrd We may relax this bound at some point, but I'd go with this until we have evidence that it bothers users, as there have been cases where I actually was happy to be informed about Ord vs PartialOrd.
We may relax this bound at some point, but I'd go with this until we have evidence that it bothers users, as there have been cases where I actually was happy to be informed about Ord vs PartialOrd.
… instead of bool More canonical.
Slightly simplifies control flow as it avoids mutable variables that may not even be used in case of early return.
the {min,max}_set results must contain the result of the corresponding
{min,max} variant.
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This looks great to me and thanks for taking over and fixing it. |
jswrenn
approved these changes
May 23, 2022
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bors r+ |
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Build succeeded: |
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This PR supersedes #323 (I did not know how I could amend to the original PR, so sorry for the "duplicate" PR here.)
The original PR by @zayenz looked rather good. I adjusted the stuff that came up during discussion back then:
Vecinstead ofOption- emptiness is sufficiently well represented byVec.Ordinstead ofPartialOrd- just asIterator::min.ltby accepting aFnMut(...)->Ordering- seems canonical compared to thebool-solution.for-loop.Moreover, I simplified some bits.