Re: Comparison of two 'dynamic arrays'.

[matheus. via Digitalmars-d-learn]

On Sunday, 13 November 2022 at 15:45:40 UTC, DLearner wrote:
On Sunday, 13 November 2022 at 14:39:26 UTC, Siarhei Siamashka 
wrote:
On Sunday, 13 November 2022 at 14:28:45 UTC, DLearner wrote:
Creating a step 1.5:
```
int[] B = A;
```

```D
auto B = A.dup;
```

This will create a copy of A rather than referencing to the 
same buffer in memory.

Tested:

```
void main() {

   import std.stdio;


   struct test_struct {
      char[] Txt;
   }

   test_struct[] A;


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

   writeln(A);


   auto B = A.dup;

   writeln(A, B);

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

   writeln(A, B);
}

```

Got:
```
[test_struct("X")]
[test_struct("X")][test_struct("X")]
[test_struct("Y")][test_struct("Y")]
```

Expected last line to be Y,X not Y,Y.

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.