On Fri, 24 Nov 2000, Yukihiro Matsumoto wrote:

> Hi,
> 
> In message "[ruby-talk:6550] Note on docs for Array#reverse!"
>     on 00/11/23, Robert Feldt <feldt / ce.chalmers.se> writes:
> |
> |"..., returning nil if arr is unchanged."
> |
> |does not fully describe the behavior
> 
> For reverse! behavior, `unchanged' means array size is either 0 or 1,
> and that's all.  Neither I nor Ruby check for array contents.  It
> costs a lot.
> 
Ok, thanks. I'll do the same in my BitVector class.

/Robert