Design with appender: good or bad?

[Rene Zwanenburg]

On Thursday, 10 April 2014 at 13:57:26 UTC, Chris wrote:
>
> The funny thing, though, is that after clearing buf
>
> writeln(data1[0]);
>
> still prints "World1". It only changes after I add a new item 
> to buf.

Correct. The memory has not been touched by clear(), it just sets 
it's internal used elements counter to 0. When adding new items 
the old ones will be overwritten.