I agree that some variation of an approach using  m/..?/g or  unpack() is better, but a more concise  split() solution would be: 

>perl -wMstrict -le
"print for grep length, split /(..)/, '0001020304101112';"
00
01
02
03
04
10
11
12

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In reply to Re^2: Split on every second character by AnomalousMonk
in thread Split on every second character by gri6507

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