Programming puzzles: processing lists!

[DavidM]

(06-07-2017 08:57 AM)pier4r Wrote:  ...83 seconds of LSHF

LSHF should be faster in the attached release. Not as fast as your binary shuf, of course, but on an ARM-based RPL calculator (49g+ or 50g) this version is about twice fast as the previous version in my testing. And that includes the new-and-improved range checking for the RAND seed as well.

You'll need to uninstall the previous library before installing this one. There's a handy command for doing that -- it's the last one in the library (so you can simply activate the library menu in the normal way, then go PREV to see it).

As a reminder, the command numbers have changed in this version, so be aware that any stored programs using the previous release's commands will now need to be edited appropriately.

A text file containing detailed descriptions of each command is included in the zip. Here's a summary of the current commands included:

LCLLT - collates a list of sublists
LCNT - counts objects in a list
LDDUP - removes duplicates from a list
LDST - distributes list items into sublists (reciprocal of LCLLT)
LEQ - checks list items to see if any do not match
LGRP - replaces repeated elements with a single instance
LMRPT - repeats list contents as indicated by count
LNDUP - creates a list by repeating an object as indicated by count
LREPL - replaces list elements with a substitute object as indicated
LROT - rotates list elements left or right as indicated by count
LRPCT - list with LGRP elements and another list of the count of each element
LSDIV - subdivides a list into <count> sublists
LSHF - shuffles the contents of a list
LSPLT - splits a list as indicated into two sublists
LSUM - ΣLIST that also handles lists with 0 or 1 element
LSWP - swaps the position of two list elements
LXIL - explodes inner sublists into individual elements (non-recursive)
LXILR - recursive version of LXIL
S→NL - converts a string to a list of numbers
NL→S - converts a list of numbers to a string
S→SL - converts a string to a list of characters
SL→S - converts a list of characters to a string