# Asking for RadixSort

**URL:** <https://discourse.julialang.org/t/asking-for-radixsort/96416>\
**Category:** General Usage\
**Created:** [March 21, 2023, 6:52pm UTC](https://discourse.julialang.org/t/asking-for-radixsort/96416 "2023-03-21T18:52:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![PetrKryslUCSD](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/petrkryslucsd/32/215825_2.png) [@PetrKryslUCSD](https://discourse.julialang.org/u/PetrKryslUCSD)\
**Post date:** [March 21, 2023, 6:52pm UTC](https://discourse.julialang.org/t/asking-for-radixsort/96416/1 "2023-03-21T18:52:53Z")

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The version 1.9.0-rc1:  
Asking for RadixSort (similarly what one can do for QuickSort)

```julia
sort!(prm; alg=Base.Sort.QuickSort, order=Base.Order.Perm(Base.Order.Forward, rows), scratch=scratcha);

```

fails. Any clues why, and how one might specifically request radix sort?

---

<div class="post-metadata">

**Author:** ![baggepinnen](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/baggepinnen/32/693_2.png) [@baggepinnen](https://discourse.julialang.org/u/baggepinnen)\
**Post date:** [March 22, 2023, 6:53am UTC](https://discourse.julialang.org/t/asking-for-radixsort/96416/2 "2023-03-22T06:53:55Z")

</div>

Good question… You probably need to instantiate the type like `Base.Sort.RadixSort()`, which differs in interface slightly from `QuickSort <: QuickSortAlg`. Even then, you get

```julia
julia> sort(rand(1:10, 5); alg=Base.Sort.RadixSort())
ERROR: ArgumentError: mn is needed but has not been computed

```

maybe there’s something more to choose that I don’t get?