Thread overview
updated mir interface
Nov 07
Alex
Nov 07
9il
Nov 07
Alex
Nov 07
9il
Nov 07
Alex
Nov 07
Alex
Nov 07
drug
Nov 07
9il
Nov 07
Alex
November 07
I'm referring to the example
http://docs.random.dlang.io/latest/mir_random_algorithm.html#.sample

Could somebody tell me, why

´´´
import mir.random.algorithm;
import std.range; //import mir.range;

void main()
{ // line 5
	size_t[] arr;
	arr.length = 42;
	arr = arr.length.iota.array;
	auto res = rne.sample(arr, 1);
} // line 10
´´´
refuses to compile?

The error message is

/Users/alex/.dub/packages/mir-random-2.1.1/mir-random/source/mir/random/algorithm.d(551,23): Error: no property popFrontExactly for type ulong[]
/Users/alex/.dub/packages/mir-random-2.1.1/mir-random/source/mir/random/algorithm.d(558,13): Error: template instance `mir.random.algorithm.RandomSample!(MersenneTwisterEngine!(ulong, 64LU, 312LU, 156LU, 31LU, 13043109905998158313LU, 29LU, 6148914691236517205LU, 17LU, 8202884508482404352LU, 37LU, 18444473444759240704LU, 43LU, 6364136223846793005LU), ulong[]).RandomSample.__ctor!()` error instantiating
/Users/alex/.dub/packages/mir-random-2.1.1/mir-random/source/mir/random/algorithm.d(448,35):        instantiated from here: __ctor!()
source/app.d(9,23):        instantiated from here: sample!(MersenneTwisterEngine!(ulong, 64LU, 312LU, 156LU, 31LU, 13043109905998158313LU, 29LU, 6148914691236517205LU, 17LU, 8202884508482404352LU, 37LU, 18444473444759240704LU, 43LU, 6364136223846793005LU), ulong[])
dmd failed with exit code 1.
November 07
On Wednesday, 7 November 2018 at 09:33:32 UTC, Alex wrote:
> I'm referring to the example
> http://docs.random.dlang.io/latest/mir_random_algorithm.html#.sample
>
> [...]

This is a regression. It is fixed in mir-random v2.1.2.
November 07
On Wednesday, 7 November 2018 at 14:07:32 UTC, 9il wrote:
> This is a regression. It is fixed in mir-random v2.1.2.

Thanks. But I have another one:

´´´
import mir.random.algorithm;
import std.experimental.all;

void main()
{
	S[] arr;
	arr.length = 42;
	arr.each!((i, ref el) => el.i = i);
	auto res = rne.sample(arr.map!((ref el) => el.i), 1);
}

struct S { size_t i; }
´´´

Does not depend, on whether I use (ref el) or just el... And should not depend on that ;)
November 07
On Wednesday, 7 November 2018 at 14:46:17 UTC, Alex wrote:
> On Wednesday, 7 November 2018 at 14:07:32 UTC, 9il wrote:
>> This is a regression. It is fixed in mir-random v2.1.2.
>
> Thanks. But I have another one:
>
> ´´´
> import mir.random.algorithm;
> import std.experimental.all;
>
> void main()
> {
> 	S[] arr;
> 	arr.length = 42;
> 	arr.each!((i, ref el) => el.i = i);
> 	auto res = rne.sample(arr.map!((ref el) => el.i), 1);
> }
>
> struct S { size_t i; }
> ´´´
>
> Does not depend, on whether I use (ref el) or just el... And should not depend on that ;)

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. 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; }


November 07
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!
November 07
Ok... sorry for being penetrant, but there is still something strange. Having dependencies as you had,

´´´
import mir.random.algorithm;
import mir.algorithm.iteration;
import mir.ndslice;
import mir.random;

void fun(size_t s){}

void main()
{
	size_t[] arr;
	arr.length = 42;

	rne.sample(arr, 1).each!(el => fun(el));
	foreach(i; rne.sample(arr, 1)) { i.fun; }
}
´´´

I get

/Users/alex/.dub/packages/mir-random-2.1.2/mir-random/source/mir/random/algorithm.d(573,48): Error: no property front for type ulong[]
/Users/alex/.dub/packages/mir-algorithm-3.0.3/mir-algorithm/source/mir/algorithm/iteration.d-mixin-922(922,5): Error: template instance `mir.random.algorithm.RandomSample!(MersenneTwisterEngine!(ulong, 64LU, 312LU, 156LU, 31LU, 13043109905998158313LU, 29LU, 6148914691236517205LU, 17LU, 8202884508482404352LU, 37LU, 18444473444759240704LU, 43LU, 6364136223846793005LU), ulong[]).RandomSample.front!()` error instantiating
/Users/alex/.dub/packages/mir-algorithm-3.0.3/mir-algorithm/source/mir/algorithm/iteration.d(966,25):        instantiated from here: eachImpl!(__lambda1, RandomSample!(MersenneTwisterEngine!(ulong, 64LU, 312LU, 156LU, 31LU, 13043109905998158313LU, 29LU, 6148914691236517205LU, 17LU, 8202884508482404352LU, 37LU,18444473444759240704LU, 43LU, 6364136223846793005LU), ulong[]))
source/app.d(13,20):        instantiated from here: each!(RandomSample!(MersenneTwisterEngine!(ulong, 64LU, 312LU, 156LU, 31LU, 13043109905998158313LU, 29LU, 6148914691236517205LU, 17LU, 8202884508482404352LU, 37LU, 18444473444759240704LU, 43LU, 6364136223846793005LU), ulong[]))
dmd failed with exit code 1.

If I import in mir.random.algorithm.d (2.1.2) in line 534 std.range, the error goes away. But I assume, that's not the way it should be solved, is it?
November 07
On 07.11.2018 22:09, Alex wrote:
> Ok... sorry for being penetrant, but there is still something strange. Having dependencies as you had,
> 
> ´´´
> import mir.random.algorithm;
> import mir.algorithm.iteration;
> import mir.ndslice;
> import mir.random;
> 
> void fun(size_t s){}
> 
> void main()
> {
>      size_t[] arr;
>      arr.length = 42;
> 
>      rne.sample(arr, 1).each!(el => fun(el));
>      foreach(i; rne.sample(arr, 1)) { i.fun; }
> }
> ´´´
> 
> I get
> 
> /Users/alex/.dub/packages/mir-random-2.1.2/mir-random/source/mir/random/algorithm.d(573,48): Error: no property front for type ulong[]
> /Users/alex/.dub/packages/mir-algorithm-3.0.3/mir-algorithm/source/mir/algorithm/iteration.d-mixin-922(922,5): Error: template instance `mir.random.algorithm.RandomSample!(MersenneTwisterEngine!(ulong, 64LU, 312LU, 156LU, 31LU, 13043109905998158313LU, 29LU, 6148914691236517205LU, 17LU, 8202884508482404352LU, 37LU, 18444473444759240704LU, 43LU, 6364136223846793005LU), ulong[]).RandomSample.front!()` error instantiating
> /Users/alex/.dub/packages/mir-algorithm-3.0.3/mir-algorithm/source/mir/algorithm/iteration.d(966,25):        instantiated from here: eachImpl!(__lambda1, RandomSample!(MersenneTwisterEngine!(ulong, 64LU, 312LU, 156LU, 31LU, 13043109905998158313LU, 29LU, 6148914691236517205LU, 17LU, 8202884508482404352LU, 37LU,18444473444759240704LU, 43LU, 6364136223846793005LU), ulong[]))
> source/app.d(13,20):        instantiated from here: each!(RandomSample!(MersenneTwisterEngine!(ulong, 64LU, 312LU, 156LU, 31LU, 13043109905998158313LU, 29LU, 6148914691236517205LU, 17LU, 8202884508482404352LU, 37LU, 18444473444759240704LU, 43LU, 6364136223846793005LU), ulong[]))
> dmd failed with exit code 1.
> 
> If I import in mir.random.algorithm.d (2.1.2) in line 534 std.range, the error goes away. But I assume, that's not the way it should be solved, is it?
It's not a full answer, but try to add `import std.array;` or its analog in mir if exists
November 07
On Wednesday, 7 November 2018 at 19:09:50 UTC, Alex wrote:
> Ok... sorry for being penetrant, but there is still something strange. Having dependencies as you had,
>
> [...]

Well, fixed in v2.1.3
November 07
On Wednesday, 7 November 2018 at 19:40:57 UTC, 9il wrote:
> On Wednesday, 7 November 2018 at 19:09:50 UTC, Alex wrote:
>> Ok... sorry for being penetrant, but there is still something strange. Having dependencies as you had,
>>
>> [...]
>
> Well, fixed in v2.1.3

Thanks again!
Works for now.