Binary data versus numbers: 
print "\x45" | "\x59"; # Prints \x5d.
print 'E'    | 'Y';    # Same as the above, prints ].
print 69     | 89;     # Prints 93 (5d in hex).

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| is clever, it knows whether it operates on bytes (strings) or numbers.

Update: fixed typo (s/78/89/), thanks poj.

لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re^3: Writing the elements of an array to a file by choroba
in thread Writing the elements of an array to a file by bontchev

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