Comparison of two 'dynamic arrays'.

[DLearner]

On Sunday, 13 November 2022 at 16:11:17 UTC, matheus. wrote:
[...]
>
> You should add the code below after "auto B = A.dup;":
>
>    B[0].Txt = A[0].Txt.dup;
>
> The "Txt" property inside B is still referencing A without the 
> above.
>
> Matheus.

Thank you - your suggestion worked.

The slight generalisation shown at bottom also worked.

However, is there a way of avoiding the for-loop?
Things like
```
B[].Txt = A[].Txt.dup;
```
did not work for me.

```
void main() {

    import std.stdio;

    int index;
    struct test_struct {
       char[] Txt;
    }

    test_struct[] A;

    A.length = 2;
    A[0].Txt.length = 1;
    A[1].Txt.length = 1;

    A[0].Txt[0] = 'W';
    A[1].Txt[0] = 'X';

    writeln(A);

    auto B = A.dup;
    for (index = 0; index < A.length; index = index + 1) {
       B[index].Txt = A[index].Txt.dup;
    }

    writeln(A, B);

    A[0].Txt[0] = 'Y';
    A[1].Txt[0] = 'Z';

    writeln(A, B);
}
```