Paul Jarc wrote:
> Jon Seymour <jon.seym...@gmail.com> wrote:
>> On Mon, Feb 16, 2009 at 10:22 AM, Paul Jarc <p...@po.cwru.edu> wrote:
>>> CPATH=${CPATH:+$CPATH:}${#+~usr1/blah/blah}
>>
>> Out of interest, how does one derive that outcome from the documented
>> behaviour of bash? That is, which expansion rules are being invoked?
>
> It's ${parameter+word}, using $# (which is always set) as the
> parameter.How do you know that $# is always set? And what about $...@? To what values are these parameters set outside any function? A more appropriate parameter to use could be $? which, by pure logic, seems to be at least as often set as is $#. -Angel
