Thank you for the detailed answer! I see you added a couple other ways to pass arguments to subroutines; in response to your questions,
What's the difference between feeding the strings "$x, $y" and '$x, $y' to eval?
The first "flattens" $x and $y to their integer literal values (2, 3) and passes that to add, while the 2nd passes the variable names ($x, $y), which are then resolved to their values in add.
What's @ra[ 2, 1 ] all about?
Selects elements 2 and 1 - integer literals (3, 2) - from @ra and passes those to add

If I am missing something please let me know, otherwise no need to reply. Thanks again!

In reply to Re^5: tk option+value in variable? by cniggeler
in thread tk option+value in variable? by cniggeler

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