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bitwise string operatorby Anonymous Monk |
on Jun 13, 2013 at 16:42 UTC ( [id://1038797]=perlquestion: print w/replies, xml ) | Need Help?? |
Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question: I found this post on-line and I am not clear exactly what is going on. “…you will get a string of bytes with values zero and one, rather then the characters '0' and '1'. To make this printable just 'or' in a string of zeroes of the right length.” $dd |= '0' x length $dd I know what the result of this statement is but I am not sure exactly what (how) it is doing (it). I am comparing 2 strings (^) and when I do $cmp |= '0' x length($cmp); # See rest of code below. numbers magically appear and I can then see (print) what is in $cmp. So, what exactly does ‘or’ in a string of zeroes mean? Zeroes appear but so do other digits (“A” ^ “C” → 2). What does |= do? (or |= ‘0’) Is there some substitution occurring? My code:
**OUTPUT** AAAACCCCGGGGTTTT ACGTACGTACGTACGT 0265204764035730 grazie, romano
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