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where there are two items in data, of length
lengths and lengths respectively.
eval('($junk1 , $junk2, $data0, $data1) = unpack "ssA' . $data0_length
+ . "A" . $data1_length . '",$rcvd_buf;');
By rote learning.
Via Genetic memory.
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.
Results (101 votes),