Re: [PATCH] Introduce array_shuffle() and array_sample()

Am 19.07.22 um 00:52 schrieb Martin Kalcher:
> 
> On the contrary! I am pretty sure there are people out there wanting 
> sampling-without-shuffling. I will think about that.

I gave it some thought. Even though there might be use cases, where a 
stable order is desired, i would consider them edge cases, not worth the 
additional complexity. I personally would not expect array_sample() to 
return elements in any specific order. I looked up some sample() 
implementations. None of them makes guarantees about the order of the 
resulting array or explicitly states that the resulting array is in 
random or selection order.

- Python random.sample [0]
- Ruby Array#sample [1]
- Rust rand::seq::SliceRandom::choose_multiple [2]
- Julia StatsBase.sample [3] stable order needs explicit request

[0] https://docs.python.org/3/library/random.html#random.sample
[1] https://ruby-doc.org/core-3.0.0/Array.html#method-i-sample
[2] 
https://docs.rs/rand/0.6.5/rand/seq/trait.SliceRandom.html#tymethod.choose_multiple
[3] https://juliastats.org/StatsBase.jl/stable/sampling/#StatsBase.sample