void main()

{

    import std.algorithm.iteration: each;

    import std.range: stride;

    import std.stdio: writeln;

​

    int[] x = [1, 2, 3, 4, 5, 6, 7, 8];

    x[1..6].stride(2).each!((ref item) { item = 0; });

    writeln(x);

}