On Wednesday, 7 November 2018 at 17:05:31 UTC, 9il wrote:
I have updated template constraints.
http://docs.random.dlang.io/latest/mir_random_algorithm.html#.sample
The problem that looks like Phobos map does not define all
required primitives like popFrontExactly.
Ok... didn't have this on my radar.
I suggest using Mir instead of Phobos if possible:
https://run.dlang.io/is/NBTfwF
/+dub.sdl:
dependency "mir-algorithm" version="~>3.0.3"
dependency "mir-random" version="~>2.1.1"
+/
import mir.random.algorithm;
import mir.algorithm.iteration;
import mir.ndslice: sliced, iota, map, member;
void main()
{
S[] arr;
arr.length = 42;
// using each
arr.length.iota.each!((i, ref el) => el.i = i)(arr);
// or using each and member
arr.length.iota.each!"b = a"(arr.member!"i");
// or using assign
arr.member!"i"[] = arr.length.iota;
auto res0 = rne.sample(arr.map!((ref el) => el.i), 1);
// or using member
auto res1 = rne.sample(arr.member!"i", 1);
}
struct S { size_t i; }
I will try to adopt this... Thanks a lot!
