I want int[][] like this -> [[1, 2, 3, 4, 5], [6, 7, 8, 9, 10], [11, 12, 13, 14, 15]]

Any help will be appreciated.

note: to2Darray is not a valid statement ;-)


// ---
module test;

import std;

void main()
{
    int[][] arrayOfarrays = iota(1, 16).chunks(5).to2Darray; // how to convert this into [][]
}
// ---

On Saturday, 15 January 2022 at 01:49:14 UTC, forkit wrote:
> I want int[][] like this -> [[1, 2, 3, 4, 5], [6, 7, 8, 9, 10], [11, 12, 13, 14, 15]]
>
> Any help will be appreciated.
>
> note: to2Darray is not a valid statement ;-)
>
>
> // ---
> module test;
>
> import std;
>
> void main()
> {
>     int[][] arrayOfarrays = iota(1, 16).chunks(5).to2Darray; // how to convert this into [][]
> }
> // ---

import std.algorithm: map;
import std.array: array;

int[][] arrayOfArrays = iota(1, 16).chunks(5).map!array.array;

On Saturday, 15 January 2022 at 02:41:08 UTC, Paul Backus wrote:
>
> import std.algorithm: map;
> import std.array: array;
>
> int[][] arrayOfArrays = iota(1, 16).chunks(5).map!array.array;

oh. thanks!

also it seems I reposted the same question (didn't realise this one got posted)

On Sat, Jan 15, 2022 at 01:49:14AM +0000, forkit via Digitalmars-d-learn wrote: [...]
>     int[][] arrayOfarrays = iota(1, 16).chunks(5).to2Darray; // how to
> convert this into [][]
[...]

	auto arrayOfArrays = iota(1, 16).chunks(5).map!(r => r.array).array;


T

-- 
Winners never quit, quitters never win. But those who never quit AND never win are idiots.

On Saturday, 15 January 2022 at 03:48:41 UTC, Steven Schveighoffer wrote:
>
> Alternatively (with only one allocation for the int[] data):
>
> ```d
> int[][] arrayOfArrays = iota(1, 16).array.chunks(5).array;
> ```
>
> -Steve

All answers were helpful ;-)

But I like this one the best, because I find it both easier to remember, and easier to expand upon (i.e. for each extra [] just add another .chunks(val).array

e.g

int[][][] arrayOfArraysV4 = iota(1, 16).array.chunks(2).array.chunks(3).array;

int[][][][] arrayOfArraysV5 = iota(1, 16).array.chunks(2).array.chunks(3).array.chunks(4).array;