defined &

[kardon33]

Could you explain this code it would realy help thank you.

unless(defined( &_ARTNET_H_) ) {
eval 'sub OpPoll () {0x2000;}' unless defined(&OpPoll );
}

[miller]

Hello kardon,

The best place to learn about this is to just read perldoc.

perldoc defined

I don't know the specifics of what this is aiming to accomplish. However, a literal translation is if the subroutine _ARTNET_H_ is undefined, define a new subroutine OpPoll() to the value 0x2000. Why they are wanting to do this, I can't say. But this is the type of thing that you often see in modules that are attempting to work in more than work environment. Say Mac, Windows, Unix, etc.

- Miller