I like D

[Dylan Knutson via Digitalmars-d]

> immutable nfields = header.count('\t');
> ...
> output.writeln(cycle("\t-").take(2 * nfields));
>
> Super-win, now I only ever have to update the original column 
> list.
>
> Little things like this are what make me love D.
>
> -Steve

I see that `take` returns a lazy range. That's really neat! How 
does writeln handle the lazy range though? Standard way of 
dealing with ranges in D, with calls to empty, front, and 
popFront (as in, does this code allocate any temporaries at all 
with the GC?)