appender!(dchar[]) put fail

[kerdemdemir via Digitalmars-d-learn]

On Saturday, 13 June 2015 at 13:09:20 UTC, Dennis Ritchie wrote:

> auto stringB = readln.chomp.map!(to!dchar).array;
> auto stringC = readln.chomp.map!(to!dchar).array;
>
> auto charAppender = appender!(dchar[][]);
>
> auto totalStr = stringB.repeat(3).chain(stringC.repeat(5));
>
> charAppender.put(totalStr);
>
> writeln(charAppender);
>
> charAppender.put("c"d.dup);
> charAppender.put("test"d.dup);
>
> writeln(charAppender);

Thanks lot that is really good.

One more question I am asking those kind of questions to 
understand and not ask same stuff over and over, :

auto totalStr = chain(stringB.replicate(bCount), 
stringC.replicate(cCount));
writeln(typeof(totalStr.array()).stringof);
---->dchar[]

But
auto totalStr = chain(stringB.repeat(bCount), 
stringC.repeat(cCount));
writeln(typeof(totalStr.array()).stringof);
---->dchar[][]

It seems to me a little inconsistent. range.repeat and 
array.replicate gives result in difference dimension.

Is there any explanation or logic that I am missing which results 
this behaviour?