Algorithms can at first seem complex to students, but with memory_graph every step is clearly visualized, giving students an intuitive understanding of what their code is doing and making bugs much easier to spot and fix. Here's an example Bubble Sort algorithm: https://memory-graph.com/#codeurl=https://raw.githubusercontent.com/bterwijn/memory_graph/refs/heads/main/src/bubble_sort.py&breakpoints=29,38&continues=1&timestep=0.2&play

#Python #programming #memory_graph #sorting

:amazon: "The ‘Most Recent’ sort option has been removed from Amazon’s review system across both desktop and mobile for most products."

In fact, you have NO options for #sorting or #filtering anymore. None at all.

You get 8-10 #reviews — of Amazon's choice — and that's it. That's all you can see now.

We'd already decided to totally quit #Amazon after our #AmazonPrime runs out in February. This makes our decision that much easier.

Here's my chat with a rep yesterday.

#Capitalism #IAmDB

Algorithms can at first seem complex to students, but with memory_graph every step is clearly visualized, giving students an intuitive understanding of what their code is doing and making bugs much easier to spot and fix. Here's an example Insertion Sort algorithm: https://memory-graph.com/#codeurl=https://raw.githubusercontent.com/bterwijn/memory_graph/refs/heads/main/src/insertion_sort.py&breakpoints=13,29&continues=1&timestep=0.2&play

#Python #programming #memory_graph #sorting

Sort the keys and values in a dictionary in Python
https://rodstephensbooks.com/sort_dictionary.html
#Python #Sorting #Dictionaries

It occurred to me today that "Stalin Sort" is related to the Stirling numbers of the first kind, really obvious when you think about it, actually.

Stalin sort is the sorting algorithm that goes as follows. Go down the line and shoot (remove) any element that is not in order. What remains is trivially sorted.

If you are sorting a list with unique entries, i.e., a permutation, then any permutation can be put into a special form (Foata's fundamental bijection https://en.wikipedia.org/wiki/Permutation#Foata's_transition_lemma) where you represent it as cycles where each cycle has its maximum displayed first, and the cycles are arranged in increasing order of those (example below from wikipedia)

Permutation matrix:
\(\begin{smallmatrix} 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 \\ 3 & 7 & 5 & 9 & 1 & 6 & 8 & 2 & 4\end{smallmatrix}\)

In cycle form:
\((5 1 3) (6) (8 2 7) (9 4)\)

This means that to each permutation, the sequence you would get by stalin sort is the same sequence as you would get by viewing it as a permutation written in this form.

The (unsigned) Stirling numbers \(s(n,k)\) of the first kind are used to count permutations according to how many cycles they have.
https://en.wikipedia.org/wiki/Stirling_numbers_of_the_first_kind

If we sum over all permutations we get \(s(n+1,2)\) (OEIS A000254), so the expected length of a permutation of length \(n\) after the gunnery squad has performed their duty is \(\dfrac{s(n+1, 2)}{n!} = H_n\)

Figured this was too short for a blog post.

#combinatorics #sorting

There's Nothing in the Air https://arxiv.org/abs/2510.22294
"the urban wage growth premium: substantially faster wage growth in larger cities
… part of this premium is driven by the firms that choose to sort themselves into bigger cities
… eliminating the job ladder mechanism, the urban wage growth premium falls by 94.1% after accounting for firms and coworkers.
… results challenge the view that cities generate human capital spillovers “in the air,” suggesting instead that urban wage dynamics reflect the #sorting of firms and workers and the pace of job #mobility."
#wages #matching #LaborMarkets

Two new mosaics for my mosaic print series. One made from text from a very old, tiny bible, and the other from text from an old, German art dictionary. Cut up and sorted. https://www.madandmoonly.com/doctormatt/sorted.htm

#art #sorting #mosaic

Сравнение алгоритмов сортировки на Python с Pygame-визуализацией

Когда объясняешь школьникам или студентам, как работает сортировка, графика говорит громче слов. Наверняка, в интернете полно обзоров и сравнительных анализов различных алгоритмов сортировки, но я не нашел ничего что объединяло бы самые популярные алгоритмы в одном сравнительном экстазе. Поэтому я написал визуализатор, который показывает в реальном времени , как разные алгоритмы сортируют один и тот же массив — одновременно .

https://habr.com/ru/articles/960178/

#python #pygame #sorting

When I Say “Alphabetical Order,” I Mean “Alphabetical Order”, by (not on Mastodon or Bluesky):

https://sebastiano.tronto.net/blog/2025-09-28-alphabetic-order/

#sorting

🚨BREAKING NEWS: The earth-shattering #revelation that #macOS and #Linux sort #text differently has finally been uncovered! 😱 We can finally sleep at night knowing that the universe is safe, all thanks to #Zhiming Wang's daring investigation into... #sorting order. 🌎✨
https://blog.zhimingwang.org/macos-lc_collate-hunt #sorting #tech #news #Wang #HackerNews #ngated

📆 How much #plastic is currently recycled in the Netherlands, Belgium and Germany? What #sorting techniques do these countries use? And how can systems for collecting, sorting and pre-treating plastic be optimized? Scientists from the EU project #Syschemiq provide answers in the online workshop “Collection and sorting of plastic waste in the trilateral region” on October 21.

✍️ Participation in the workshop is free of charge. Registrations can be made at https://s.fhg.de/3uEr.

Quicksort explained IKEA-style

https://idea-instructions.com/quick-sort/

#HackerNews #Quicksort #IKEA-style #sorting #algorithms #coding #education #technology

https://blog.gslin.org/archives/2025/09/14/12621/%e8%a8%88%e7%ae%97%e4%b8%8d%e9%87%8d%e8%a4%87%e5%85%83%e7%b4%a0%e5%95%8f%e9%a1%8c%e7%9a%84%e6%95%88%e7%8e%87/

計算不重複元素問題的效率

#algorithm #count #hash #hashed #hashing #performance #radix #set #sort #sorting #speed #table #unique

One day, one decomposition
A001855: Sorting numbers: maximal number of comparisons for sorting n elements by binary insertion

3D graph, threejs - webGL ➡️ https://decompwlj.com/3Dgraph/Sorting_numbers.html
3D graph Gen, threejs animation ➡️ https://decompwlj.com/3DgraphGen/Sorting_numbers.html
2D graph, first 500 terms ➡️ https://decompwlj.com/2Dgraph500terms/Sorting_numbers.html

#decompwlj #math #mathematics #sequence #OEIS #javascript #php #3D #sorting #numbers #comparisons #binary #insertion #graph #threejs #webGL

From the archives:

How to Order CSS Selectors:

https://meiert.com/blog/how-to-order-css-selectors/

#webdev #css #selectors #sorting

I'm such an archivist that I save and file every personal letter I receive. My latest, and first from her sent to our new house, was from friend Joan. #ocdgoals #archivist #archive #sorting #organizing #organizedhoarding #notahoarder #letters #letterwriting #correspondence

Tim Peters is reliably good at a memorable turn of phrase:

"Professor Knuth's masterful work on the topics of sorting and searching spans nearly 800 pages of sophisticated technical text. In Python practice, we reduce it to two imperatives (we read Knuth so you don't have to)..."
– Tim Peters, from his introduction to chapter 5, "Searching and Sorting", in the 2nd edition of the Python Cookbook (2005).

"Over the years samplesort was in use, I made a standing offer to buy dinner for anyone who could code a faster Python sort. Alas, I ate alone."
– Tim Peters, from his introduction to chapter 5, "Searching and Sorting", in the 2nd edition of the Python Cookbook (2005).

(4/6)

#Python #sorting #Knuth

Не пузырьком единым. Поговорим об алгоритмах сортировки

Если спросить любого, хоть немного знакомого с ИТ человека, какие алгоритмы сортировки он знает, то самым популярным ответом будет, конечно, сортировка методом пузырька. Однако в реальности это, конечно, не единственный способ сортировки. В этой статье мы поговорим о том, какие алгоритмы сортировки бывают и как их можно реализовать на Python.

https://habr.com/ru/companies/otus/articles/911968/

#sorting #алгоритмы #алгоритмы_сортировки #python