• David Zaragoza (21/21) Apr 19 2020 Hi
• Basile B. (14/35) Apr 19 2020 `permutation()` returns a lazy range (i.e an iterator). To turn a
• Basile B. (5/20) Apr 19 2020 forgot to put the imports:

David Zaragoza <mclaud2000 gmail.com> writes:

Hi

When I try to build the following:

import std.algorithm.iteration;

void test(int[] array);

void main()
{
	int[] a = [1,1,2,2,3,3];
	foreach (p; a.permutations)
	{
		test(p);
	}
}

I get the error:

.\permutations_example.d(10): Error: function 
permutations_example.test(int[] array) is not callable using 
argument types (Indexed!(int[], ulong[]))
.\permutations_example.d(10):        cannot pass argument p of 
type Indexed!(int[], ulong[]) to parameter int[] array

What's the proper way to obtain the array of permutations of a?

Kind regards
David

Basile B. <b2.temp gmx.com> writes:

On Sunday, 19 April 2020 at 17:57:21 UTC, David Zaragoza wrote:
 Hi

 When I try to build the following:

 import std.algorithm.iteration;

 void test(int[] array);

 void main()
 {
 	int[] a = [1,1,2,2,3,3];
 	foreach (p; a.permutations)
 	{
 		test(p);
 	}
 }

 I get the error:

 .\permutations_example.d(10): Error: function 
 permutations_example.test(int[] array) is not callable using 
 argument types (Indexed!(int[], ulong[]))
 .\permutations_example.d(10):        cannot pass argument p of 
 type Indexed!(int[], ulong[]) to parameter int[] array

 What's the proper way to obtain the array of permutations of a?

 Kind regards
 David

`permutation()` returns a lazy range (i.e an iterator). To turn a 
permutation into a concrete data type use .array on each one.

---
void test(int[] array){}

void main()
{
	int[] a = [1,1,2,2,3,3];
	foreach (p; a.permutations)
	{
		test(p.array);
	}
}
---

Basile B. <b2.temp gmx.com> writes:

On Sunday, 19 April 2020 at 20:25:23 UTC, Basile B. wrote:
 On Sunday, 19 April 2020 at 17:57:21 UTC, David Zaragoza wrote:
 [...]

 `permutation()` returns a lazy range (i.e an iterator). To turn 
 a permutation into a concrete data type use .array on each one.

 ---
 void test(int[] array){}

 void main()
 {
 	int[] a = [1,1,2,2,3,3];
 	foreach (p; a.permutations)
 	{
 		test(p.array);
 	}
 }
 ---

forgot to put the imports:

---
import std.algorithm.iteration, std.array;
---