Re: Parallelization of a large array

[Dennis Ritchie via Digitalmars-d-learn]

On Tuesday, 10 March 2015 at 21:15:17 UTC, safety0ff wrote:

On Tuesday, 10 March 2015 at 20:41:14 UTC, Dennis Ritchie wrote:

Hi.

How to parallelize a large array to check for the presence of an element matching the value with the data?

Here's a simple method (warning: has pitfalls):

import std.stdio;
import std.parallelism;

void main()
{
    int[] a = new int[1000000];

    foreach (i, ref elem; a)
        elem = cast(int)i;

    bool found;
    foreach (elem; a.parallel)
        if (elem == 895639)
            found = true;

    if (found)
        writeln("Yes");
    else
        writeln("No");
}

Thanks.