APM: some simple questions
Wayne Walker
wwalker at bybent.com
Tue Jan 27 12:40:35 CST 2004
On Tue, Jan 27, 2004 at 12:10:43PM -0600, Goldilox wrote:
> is it better form to do this:
>
> while($exlen > 0){$indent=$indent." ";$exlen=$exlen-1;}
>
> or this
>
> while($exlen){$indent=$indent." ";$exlen=$exlen-1;}
>
> (or is the second one even going to work?)
Both should work (didn't test it, nor did I test this...)
This should also work
$indent .= (" " x $exlen);
see "perldoc perlop" search for " x " minus the quotes
> 2nd question:
> why do sometimes I have to call a subroutine with an ampersand
>
> &subroutine();
>
> and other times can just say the name of the subroutine
>
> subroutine;
Perl understands any subroutine that is builtin, or has already been
defined (above where it's being called) is a subroutine. If you define
it later in the program file, perl doesn't know yet that it's a sub.
>
> ??
>
> Thanks for help, advice, etc!
>
> Rhett
>
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--
Wayne Walker
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