AK108,
Admittedly, I haven't read most of this thread. It sounds like what you want is shuffle() that takes 1 or 2 arguments. With one argument (the list), it will return a random permutation of a list along with an ID. If called with two arguments (the list and an ID), it will return the exact same permutation every time.

If this sounds like what you want, there may be a way to create a rank()/unrank() routine for permutations. I have done it for combinations before. If nothing else, you could create a permutations iterator where the ID is the number of iterations to generate the desired shuffle. You could then just have the iterator loop ID times.

Cheers - L~R

In reply to Re: A reproducible shuffle? ("stable shuffle") by Limbic~Region
in thread A reproducible shuffle? ("stable shuffle") by AK108

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.