Algorithm::Permute - Handy and fast permutation with object oriented interface
This handy module makes performing permutation in Perl easy and fast, although perhaps its algorithm is not the fastest on the earth. It supports permutation r of n objects where 0 < r <= n.
(9,12,7,4) R²U Fs R²Bs U R²: 1/9: A (9,12,9,3) L F'L B²L'F L B²L² 1/9: Z (12,18,7,6) Ls Ds2 Ls D Ls2 U' Bs2 (12,13,11,3) R' F R Ba' R Fs R F'R'B2 (U3) Ls D L2 F2 R2 L2 B2 R2 D' Ls: 1/36: H (10,12,10,5) Ra U² Ra'Fa'U² Fa (9,17,7,5) R2 Bs2 L² D' R²Bs2 L²(U) 1/72: E. P = 6×3 complex 3.0000 + 1.0000i 2.0000 + 1.0000i 1.0000 + 1.0000i 3.0000 + 1.0000i 1.0000 + 1.0000i 2.0000 + 1.0000i 2.0000 + 1.0000i 3.0000 + 1.0000i 1.0000 + 1. Permute 3 was started from scratch - completely new project, everything written from the ground up again. It includes many new features and the entire workflow has been improved with many per-conversion customizations. This free calculator can compute the number of possible permutations and combinations when selecting r elements from a set of n elements. Learn more about the differences between permutations and combinations, or explore hundreds of other calculators covering topics such as finance, fitness, health, math, and more.
Returns a permutor object for the given items.
Returns a list of the items in the next permutation. The order of the resulting permutation is the same as of the previous version of
Algorithm::Permute
.Returns the list of items which will be returned by next(), but doesn't advance the sequence. Could be useful if you wished to skip over just a few unwanted permutations.
Resets the iterator to the start. May be used at any time, whether the entire set has been produced or not. Has no useful return value.
Starting with version 0.03, there is a function - not exported by default - which supports a callback style interface: Download canvas draw 4.
A block of code is passed, which will be executed for each permutation. The array will be changed in place, and then changed back again before
permute
returns. During the execution of the callback, the array is read-only and you'll get an error if you try to change its length. (You can change its elements, but the consequences are liable to confuse you and may change in future versions.)You have to pass an array, it can't just be a list. It does work with special arrays and tied arrays, though unless you're doing something particularly abstruse you'd be better off copying the elements into a normal array first. Example:
The code is run inside a pseudo block, rather than as a normal subroutine. That means you can't use
return
, and you can't jump out of it using goto
and so on. Also, caller
won't tell you anything helpful from inside the callback. Such is the price of speed.The order in which the permutations are generated is not guaranteed, so don't rely on it.
The low-level hack behind this function makes it currently the fastest way of doing permutation among others.
I've collected some Perl routines and modules which implement permutation, and do some simple benchmark. The whole result is the following.
Permutation of eight scalars:
Permutation of nine scalars (the Abigail's routine is commented out, because it stores all of the result in memory, swallows all of my machine's memory):
The benchmark script is included in the bench directory. I understand that speed is not everything. So here is the list of URLs of the alternatives, in case you hate this module.
- Memoization is discussed in chapter 4 Perl Cookbook, so you can get it from O'Reilly: ftp://ftp.oreilly.com/published/oreilly/perl/cookbook
- Abigail's: http://www.foad.org/~abigail/Perl
- Movavi video editor plus 2020 20 2 16. List::Permutor: http://www.cpan.org/modules/by-module/List
- The classic way, usually used by Lisp hackers: perldoc perlfaq4
In Edwin's words: Yustina Sri Suharini - my ex-fiance-now-wife, for providing the permutation problem to me.
- Data Structures, Algorithms, and Program Style Using C - Korsh and Garrett Duplicate detective 1 99 2.
- Algorithms from P to NP, Vol. I - Moret and Shapiro
Edwin Pratomo <[email protected]> was the original author.
Stephan Loyd <[email protected]> is co-maintainer after version 0.12.
The object oriented interface is taken from Tom Phoenix's
List::Permutor
. Robin Houston <[email protected]> invented and contributed the callback style interface.This software is copyright (c) 1999 by Edwin Pratomo.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
To install Algorithm::Permute, copy and paste the appropriate command in to your terminal.
For more information on module installation, please visit the detailed CPAN module installation guide.
Permute 3.4.2 MacOS [Full]
Permute
Video, audio and image files come in many different kinds and shapes, but sometimes you need a specific format since your iPad or DVD player won’t play that video. That is what Permute is for – easily convert your media files to various different formats.
Features:
- Easy to Use – built from the ground up, Permute is a perfect example of what a Mac app should be. With a gorgeous interface and drag & drop simplicity no need for complicated options.
- Insanely Fast – App was engineered to be incredibly fast. Let us take care of the hard stuff. Just select the video format you want and it’ll be done faster than you can say “hardware acceleration” – MP4 and HEVC presets now take advantage of your machine’s hardware acceleration capabitlities, speeding up HEVC conversions more than 3 times over previous versions of Permute!
- PDF Support – Permute 3 now includes support for stitching multiple images into a single PDF.
- Everything Included – It doesn’t matter if you’re converting home movies or processing images. App can do it all. We support nearly every format and have plenty of device presets to choose from.
- Looks Amazing – Whether you use dark mode or not, Permute will look amazing. Taking advantage of the modern technologies, App will even change its icon in dark mode.
- Keep the Schedule – Video re-encoding is quite demanding on computer resources. This is why you can now schedule Permute to convert videos e.g. at night when you’re not using your computer.
- And so much more! – There are so many other great features in App – adjust volume of an audio file or an audio track in a video. Batch-resize, rotate and flip images and videos. And more!
Permute 3 1 12 Esv
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Requirements: OS X 10.11 or later 64-bit
Permute 3 1 12 X 2
Permute 3.4.2 MacOS – (57.7 Mb)