Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

print scalar reverse "\nou";

If you entered this using an UTF-8 editor, you forgot to "use utf8;" to notify Perl of this fact.

You may be dealing with the string "\no\x{C3}\x{A4}u" instead of the intended "\no\x{e4}u"!

reverse Works on bytes

reverse works on characters. If you have a bytestring, every character represents the equivalent byte. If you have a Unicode text string, reverse properly reverses based on unicode codepoints.

You can solve this problem by decoding the text strings

This suggests that decoding is a workaround. It is not, it is something you should always do when dealing with text data!

The use utf8; takes care that every string literal in the script is treated as a text string

Perl has no idea, and cannot be told, what kind your strings are: binary or text. Without "use utf8" you don't necessarily have byte strings, but if you have text strings, they're interpreted as iso-8859-1 rather than utf-8. Note that iso-8859-1 is a unicode encoding -- it just doesn't support all of the characters.

The rest of your post is accurate, but I wanted to respond to avoid that newbies get a negative feeling about Perl's unicode support from your post. Perl's unicode support is great, but the programmer MUST learn the difference between unicode and utf-8, and the difference between text data and binary data.

In reply to Re: How to reverse a (Unicode) string by Juerd
in thread How to reverse a (Unicode) string by moritz

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others examining the Monastery: (5)
    As of 2020-09-26 22:02 GMT
    Find Nodes?
      Voting Booth?
      If at first I dont succeed, I

      Results (142 votes). Check out past polls.