• Namal (16/16) Aug 31 2015 Hello,
• Rikki Cattermole (12/28) Aug 31 2015 You cannot define static arrays using runtime information.
• Namal (14/25) Aug 31 2015 Hmm, this has never been a problem for me in C++
• bearophile (4/7) Aug 31 2015 VLAs are not present in D.
• Namal (3/11) Aug 31 2015 Yah, I guess I have been damaged with them when I started to
• Namal (3/3) Aug 31 2015 Hey guys, since I am learning D arrays here, can you tell me the
• cym13 (5/8) Aug 31 2015 import std.algorithm;
• cym13 (4/12) Aug 31 2015 Also, to remove the last element you can use slices:

"Namal" <sotis22 mail.ru> writes:

Hello,

can someone explain to me please what I am doing wrong by passing 
an integer to this function and then just creating a static 
array? The error I get is:

Error: variable N cannot be read at compile time

int[] foo(int N){


	int[N] v;
	//do something with it
	int[] s;
	return s;
}

void main(){

	int N = 12;
	int[] A;
	A=prim_numbers(N);

}

Rikki Cattermole <alphaglosined gmail.com> writes:

On 31/08/15 11:24 PM, Namal wrote:
 Hello,

 can someone explain to me please what I am doing wrong by passing an
 integer to this function and then just creating a static array? The
 error I get is:

 Error: variable N cannot be read at compile time

 int[] foo(int N){


      int[N] v;
      //do something with it
      int[] s;
      return s;
 }

 void main(){

      int N = 12;
      int[] A;
      A=prim_numbers(N);

 }

You cannot define static arrays using runtime information.
You must use dynamic arrays.

int[] foo(int N) {
	int[] v;
	v.length = N;
	// do something with it
	int[] 2;
	return s;
}


Of course you can pass it in via a template argument. But this of course 
does not work at runtime like you are wanting.

"Namal" <sotis22 mail.ru> writes:

On Monday, 31 August 2015 at 11:27:20 UTC, Rikki Cattermole wrote:

 You cannot define static arrays using runtime information.
 You must use dynamic arrays.

 int[] foo(int N) {
 	int[] v;
 	v.length = N;
 	// do something with it
 	int[] 2;
 	return s;
 }


 Of course you can pass it in via a template argument. But this 
 of course does not work at runtime like you are wanting.


Hmm, this has never been a problem for me in C++

#include <vector>


std::vector<int> foo(int N){

	std::vector<int> V(N);
	int some_array[N];

	std::vector<int> other_V;

	return other_V;
	
}

int main(){

std::vector<int> V = foo(12);


}

compiles

"bearophile" <bearophileHUGS lycos.com> writes:

Namal:

 std::vector<int> foo(int N){

 	std::vector<int> V(N);
 	int some_array[N];

VLAs are not present in D.

Bye,
bearophile

"Namal" <sotis22 mail.ru> writes:

On Monday, 31 August 2015 at 12:00:26 UTC, bearophile wrote:
 Namal:

 std::vector<int> foo(int N){

 	std::vector<int> V(N);
 	int some_array[N];

 VLAs are not present in D.

 Bye,
 bearophile

Yah, I guess I have been damaged with them when I started to 
learn programming in C++ >(

"Namal" <sotis22 mail.ru> writes:

Hey guys, since I am learning D arrays here, can you tell me the 
best way to remove an element at the end of an array or at some 
index i?

"cym13" <cpicard openmailbox.orgk> writes:

On Monday, 31 August 2015 at 13:00:49 UTC, Namal wrote:
 Hey guys, since I am learning D arrays here, can you tell me 
 the best way to remove an element at the end of an array or at 
 some index i?

import std.algorithm;

T[] arr;
arr = arr.remove(index);

http://p0nce.github.io/d-idioms/#Adding-or-removing-an-element-from-arrays

"cym13" <cpicard openmailbox.org> writes:

On Monday, 31 August 2015 at 13:17:30 UTC, cym13 wrote:
 On Monday, 31 August 2015 at 13:00:49 UTC, Namal wrote:
 Hey guys, since I am learning D arrays here, can you tell me 
 the best way to remove an element at the end of an array or at 
 some index i?

 import std.algorithm;

 T[] arr;
 arr = arr.remove(index);

 http://p0nce.github.io/d-idioms/#Adding-or-removing-an-element-from-arrays

Also, to remove the last element you can use slices:

T[] arr;
arr = arr[0..$-1];