in reply to
Better to use Carp for tracing a call stack than caller.
If you only want one layer back, use carp(). And if you want the whole call stack, use cluck(). But if you want anything in between, you need to build it yourself with caller().
By rote learning.
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It's provided by my firmware.
I just remember them.
Thirty days hath September
My computer gets it right, usually.
I just ask someone else.
Someone punches me on the first of the month.
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