Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?

Re: Useless use of reference constructor in void context

by NetWallah (Abbot)
on Jul 29, 2012 at 14:33 UTC ( #984286=note: print w/ replies, xml ) Need Help??

in reply to Useless use of reference constructor in void context

Please use "code" tags to preserve code formatting.

In this snippet:

sub {\&show_cwd(); $dirtree_frame->destroy})->pack(-fill => "both", -expand => 1 +);
The "sub" returns a code-reference
The "->pack" is a dereference followed by a call to the "pack" method.

Since the subref does not de-reference to something that allows a method call, perl complains.

Update 1: Sorry - this is rubbish. I just noticed the "), which means you are calling "pack" on whatever is returned by "$dirtree_frame->Scrolled".

Update 2: New theory :

$dirtree_frame is not created properly.
Evidence is the TWO messages complaining about the object - one for each method call (Scrolled and destroy).
Update 3: Athanasius (++) , below is right. And thanks for fixing the formatting, and Welcome to the Monastery!

             I hope life isn't a big joke, because I don't get it.

Comment on Re: Useless use of reference constructor in void context
Download Code

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://984286]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others making s'mores by the fire in the courtyard of the Monastery: (10)
As of 2015-11-30 06:06 GMT
Find Nodes?
    Voting Booth?

    What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

    Results (758 votes), past polls