--- "Stephen P. Potter" <[EMAIL PROTECTED]>
wrote:
> Lightning flashed, thunder crashed and Erik W
> <[EMAIL PROTECTED]> whispered:
> | time() ^ $$
> |
> | What ^ and $$ mean here?
> |
> | ^ bit xor?
> | $$ logic and?
>
> $$ is a special variable that is the process ID of
> the currently running
> process. So, this is returning the bitwise xor of
> the return of time
> (seconds since epoch) and the process ID (generally
> something between 2 and
> 65536). Since perl 5.004 or so, this has been
> mostly unnecessary. Even if
> it was still necessary, it would probably be better
> to use something like
>
> time() ^ ($$ + ($$ << 15))
Thanks a lot, then what << means?
$$<<15 ???
perl is really unreadable!
>
> which at least gives two numbers of roughly the same
> magnitude.
>
> -spp
> --
> Stephen P Potter [EMAIL PROTECTED]
> "You can't just magically invoke Larry and expect
> that to prove your point.
> Or prove that you have a point." -Simon Cozens
> http://www.unixlabs.net/~spp/
>
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