I know that c# has parallel for [like
this](https://dotnettutorials.net/lesson/parallel-for-method-csharp/) .
I know that D has parallel foreach [like
this](http://ddili.org/ders/d.en/parallelism.html).
I want to do the following :
Given 4 sets , A = {a_1, a_2, ... }; B = {b_1, b_2, ... } ; C =
{c_1 , ... } ; D = {d_1, ... } - I need to make all Cartesian
products, such as {a_1, b_1, c_1, d_1 }; {a_1, b_1, c_1, d_2};
... {a_n, b_n, c_n, d_n} ; then run an operation on the elements .
Then, I need to extract the maximum and minimum values of the
results - either by storing them in an array, or by some other
suitable means.
My attempt to solve can be seen in this minimal example :
import std.stdio;
import std.math;
import std.stdio;
import std.conv;
import std.format;
import std.math;
import std.algorithm;
import std.net.curl;
import std.json;
//import dlib.image;
import std.path;
import std.array;
import std.net.curl;
import core.stdc.stdlib;
import std.datetime;
import std.file;
import opmix.dup;
import std.parallelism;
void main() {
int[] a = [1,2,3,4,5,6,7,8,9];
int[] b = [11,12,13,14,15,16,17,18];
int[] c ;
foreach(aa; parallel (a)) {
foreach (bb; parallel(b)) {
c ~= aa+bb;
}
}
writeln(c);
}
I expect the output : `[ 12, 13, 14 ....27 ]` ( not necessarily
in this order - but that is okey).
I am getting the output : `[12, 13, 14, 15, 16, 17, 18, 19, 14,
15, 16, 17, 18, 19, 20, 21, 15, 16, 17, 18, 19, 20, 21, 22, 0, 0,
0, 0, 0, 0, 0, 17, 18, 19, 20, 21, 22, 23, 24, 19, 20, 21, 22,
18, 0, 0, 0, 16, 21, 18, 22, 23, 24, 25, 20, 21, 22, 19]`.
In the next run : `[12, 13, 14, 15, 16, 17, 18, 19, 14, 15, 16,
17, 18, 19, 20, 21, 15, 16, 17, 18, 19, 20, 21, 22, 16, 17, 18,
19, 20, 21, 22, 23, 18, 19, 20, 21, 22, 23, 24, 25, 17, 18, 19,
19, 21, 20, 23, 23, 24, 24, 20, 21, 22, 23, 24, 25, 26, 27]`
In the next run : `[12, 13, 14, 15, 16, 17, 18, 19, 14, 15, 16,
17, 0, 0, 16, 18, 19, 20, 21, 17, 18, 19, 20, 15, 16, 17, 18, 19,
20, 21, 22, 18, 19, 20, 21, 22, 23, 24, 25, 19, 20, 21, 22, 16,
17, 20, 21, 22, 23, 24, 21, 22, 27, 23]`
In the 4th run : `[12, 13, 14, 15, 16, 17, 18, 19, 15, 16, 17,
18, 19, 20, 21, 22, 14, 13, 14, 15, 16, 17, 18, 19, 20, 20, 21,
22, 23, 24, 25, 26, 27, 18, 20, 22, 23, 24, 25, 20, 21, 22, 23,
24]`
What am I doing wrong?
Thank you .
