You can do it like this: 
$ perl -wE 'say for unpack "(A4)*", "74657374"'
7465
7374

[download]

But maybe there's a shorter way to do what you want with pack and unpack. See perlpacktut for a gentler introduction.

In reply to Re: Process a set num of characters at a time by moritz
in thread Process a set num of characters at a time by learningperl01

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