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Re: Help needed understanding unicode in perl

by ikegami (Patriarch)
on Dec 11, 2009 at 19:18 UTC ( [id://812419] : note . print w/replies, xml ) Need Help??


in reply to Help needed understanding unicode in perl

I understand that a unicode string is a set of symbols and that utf-8 is a way of saving these symbols as a a set of bytes

Correct.

I understand also that "use utf8;" tells perl to interpret the perl file being read as being encoded using utf8 and containing unicode symbols.

Correct.

If I call a function, how do I know if it returns a unicode string or not.

The real question is "is the input a string of bytes or a string of characters, and is the output a string of bytes of a string of characters". Try the various combinations.

How is a unicode string encoded (utf8 or 16 etc?)

Earlier, you defined "unicode string" to mean a decoded string, so your question makes no sense.

If I have a unicode string, how do I output it to my console window so that it appears correctly?

It's easiest with:

use open ':std', ':locale';

That does the equivalent of

my $enc = ...[ get encoding from locale ]...; binmode STDIN, ":encoding($enc)"; binmode STDOUT, ":encoding($enc)"; binmode STDERR, ":encoding($enc)";