Re: [TCLUG:2586] perl question

[Ry4an Brase <rbrase@ulysses.net>]

Ben Luey wrote:
> 
> In perl is there a good way to write a script such that
> 
> if A and if B, then C
> if not A then C
> if A and not B then nothing?
> 
> I'd like to write the script without typing C in twice. Also, if A, then I
> need to to some stuff to determine if B is true, so I can't do a combined
> if (A and B).
> 
> Hope this makes sense,

I'd make B a subroutine that returns a boolean value.  Since perl has
(optionally) short ciruited login it won't be called if a isn't true. 
Something like this

if (!A || (A && (&B()))) {    # that last ampersand means 'call
subroutine'
	C
}

sub B {
	stuff;
	more stuff;
	return (whatever == good);
}
--
Ry4an Brase - http://acm.cs.umn.edu/~ry4an - 612-623-9946
'If you're not a rebel when you're 20 you've got no heart; if
 you're  not establishment when you're 30 you've got no brain.'