Maybe you want Algorithm::Loops::NextPermute ? You can give it lists of lists of characters and it will spit out strings (well, lists) of the combinations:

    my @characters = (qw(C N N N N N ));
    my @list= sort ;
    do {
        usePermutation( @list );
    } while(  NextPermute( @list )  );

[download]

... or maybe the NestedLoops function is more it - I'm not sure if you also want to generate strings with 2C 4N and so on, and what other characters come into play.

If there are only two characters coming into play, generating all permutations is equivalent to counting from 1..2**$number_of_characters_in_target_string and interpreting that number as binary, a 1 is "use that character" and a 0 means "use the other character".

In reply to Re: all permutations of given lenght by Corion
in thread all permutations of given lenght by cataclismic_user

Title:
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, details, 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, summary, 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.