Honestly, I find those magical formulas° always too voodoo.

From a maintenance point of view they are horrible, because they don't scale well with new requirements.

Even Doomsday fails if you go back before Gregorian calendar

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

°) don't know the correct term here... ³

update

there is only a limited number of orders 7!

so you could try a brute force search composing formulas based on inputs like substrings or word-length.

I'm still not sure if the solution will be shorter than just a clever list.²

update

²) tybaldt's solution with "motuwethfrsasu" is just an example of such a clever list.

³) kind of golfing, isn't it?

In reply to Re^3: Challenge: sort weekdays in week-order (magical formula) by LanX
in thread Challenge: sort weekdays in week-order (elegantly and efficiently) by bliako

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.