in reply to How can I split a string into chunks of 4 characters

$str = '0123456789abcdef';; print for unpack '(a4X3)' . (length($str)-3), $str;; 0123 1234 2345 3456 4567 5678 6789 789a 89ab 9abc abcd bcde cdef

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.