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  1. or download this
    #use bytes;

...
print unpack 'B*', $x;

print "\n---\n";
  2. or download this
    Character in 'B' format wrapped in unpack at /tmp/j1.pl line 7.
10101010 --> 01010100
...
Character in 'C' format wrapped in pack at /tmp/j1.pl line 14.
10101010 --> 01010100
---