Beefy Boxes and Bandwidth Generously Provided by pair Networks
Welcome to the Monastery
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Ah, OK. Well the system is the same as you used to generate passwords: once you have an array of valid code points for the characters, you can choose 10 random codepoints from that array, like
$chosencodepoint = $codepoints[int rand @codepoints];
and construct the string, for example with:
$string = pack 'U*', @chosencodepoints;
(pack('U', $int) is pretty much equivalent to chr($int) except it also guarantees the output will be turned into UTF-8, and most of all: with the star this can easily join multiple characters without an explicit join.)

My point was: when printing it out, Perl will convert it to valid UTF-8. Don't worry about that.

An in case you want no duplicates, you can repeat the process for each character until you find no duplicates. With so many characters to choose from that is virtually guaranteed to be faster than shuffling the whole array (with the Fisher Yates shuffle) and next picking the first 10 code points. Or, you can make custom version of Fisher-Yates that stops shuffling after 10 iterations.


In reply to Re^3: How to generate random sequence of UTF-8 characters by bart
in thread How to generate random sequence of UTF-8 characters by ted.byers

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



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

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

How do I use this? | Other CB clients
Other Users?
Others surveying the Monastery: (2)
As of 2022-07-05 10:06 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found

    Notices?