Best way to combine multiple TBytes arrays

Question

What is the best way to combine TBytes arrays?

All arrays are of the same size. I want the content of Array2 to be added to the end of Array1, Array3 to the end of Array2, and so forth.

Answer 1

To merge two TBytes together, you have to allocate a third TBytes that is the total length of the two individual TBytes, then copy the bytes from both into it. For example:

var
  arr1, arr2, merged: TBytes;
begin
  ...
  SetLength(merged, Length(arr1) + Length(arr2));
  if arr1 <> nil then Move(arr1[0], merged[0], Length(arr1));
  if arr2 <> nil then Move(arr2[0], merged[Length(arr1)], Length(arr2));
end;