How to resolve the algorithm Best shuffle step by step in the PicoLisp programming language

Published on 12 May 2024 09:40 PM
#Picolisp

How to resolve the algorithm Best shuffle step by step in the PicoLisp programming language

Table of Contents

Problem Statement

Shuffle the characters of a string in such a way that as many of the character values are in a different position as possible. A shuffle that produces a randomized result among the best choices is to be preferred. A deterministic approach that produces the same sequence every time is acceptable as an alternative. Display the result as follows: The score gives the number of positions whose character value did not change.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Best shuffle step by step in the PicoLisp programming language

Source code in the picolisp programming language

(de bestShuffle (Str)
   (let Lst NIL
      (for C (setq Str (chop Str))
         (if (assoc C Lst)
            (con @ (cons C (cdr @)))
            (push 'Lst (cons C)) ) )
      (setq Lst (apply conc (flip (by length sort Lst))))
      (let Res
         (mapcar
            '((C)
               (prog1 (or (find <> Lst (circ C)) C)
                  (setq Lst (delete @ Lst)) ) )
            Str )
         (prinl Str " " Res " (" (cnt = Str Res) ")") ) ) )

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