Dan Muey schrieb am 28.10.2010 um 14:54 (-0500):
> Am I correct in thinking that the only way to get ord() to return a
> value over 256 is to send the character as a Unicode string instead of
> a byte string?
Yes.
> In other words, is there any character that will make ord() return
> over 256 when passed in as a byte string?
If you pass a character as a byte string, then it's a byte string of 8
bits per byte, and the maximum for a byte is 255.
> For example, note the differences in output between a unicode string
> and a byte string regarding character 257, as a unicode string it is
> 257, as a byte string it is 196.
Yes.
perl -Mutf8 -lwe 'print ord "Я"' # 1071
perl -lwe 'print ord "Я"' # 208
> The reason this is relevant is that on a given project I am using
> byte-strings-only for consistency and some encoders (i.e.
> Scalar::Quote::Q() )will change from
> bytes-string-friendly-grapheme-cluster notation (e.g. \xE3\x8A\xB7)
> to unicode-string-notation (e.g. \x{32B7}) and I want to be sure I
> always use data that gets me the former rather than the latter :)
Well, if you don't need character operations, it might work for you.
Make sure to track whether or not your data is already encoded, and also
to use the correct encoding.
--
Michael Ludwig
