Re: Calling subrutine with \& and passing variables

This means you are passing a callback, tk decides what is passed.

(-dropcommand => [\&accept_drop, $drop],

Depending on what you want to achieve you can

you need to be clearer about your goal.

Cheers Rolf
_{(addicted to the Perl Programming Language and ☆☆☆☆ :)

Je suis Charlie!}

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Re^2: Calling subrutine with \& and passing variables by IB2017 (Pilgrim) on Oct 29, 2017 at 01:56 UTC
Thank you for your reply. What I want to achive is actually quite simple: I'd like to pass the variable $SomeVariable to my subrutine to further process it (the code is a simplified version of my real code which is a quite complex GUI with many dynamically generated variables I need to process once the user has "dropped" a file into the widget). Hardcoding the variable in the subrutine doesn't seem to me viable as the variable is generated outside of it. Using a closure variable - as far as I understand - implies an "answer" from the subrutine (but I may be wrong about what a closure variable is). Inspecting the tk data structures hasn't helped me, unfortunately.	[reply]
Re^3: Calling subroutine with \& and passing variables by LanX (Saint) on Oct 29, 2017 at 07:49 UTC
Just use `$SomeVariable` inside your subroutine. Because it's declared outside with `my` it becomes a "closure variable". Cheers Rolf _{(addicted to the Perl Programming Language and ☆☆☆☆ :) Je suis Charlie!}	[reply] [d/l] [select]