22 May 2026, 09:42 UTC120 views2 reactionsread 12 August 2026 I just read an article by legendary Daniel Lemire titled "Only 17% of all 64-bit Integers are products of two 32-bit integers", and here's what was new for me:
I'd never really thought about how limited the space of multiplication results is. Granted, roughly a sixth of all 64-bit values is actually quite a lot - but it's good to be aware that you can only get so many distinct results out of two fixed-size factors.
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30 Apr 2026, 19:46 UTC101 views1 reactionsread 12 August 2026 Running Claude Code through application is somewhat fun, some new visuals are there compared to my VSCode terminal window. Key icons are from Mac, no matter my actual platform :D
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30 Apr 2026, 19:46 UTC96 viewsread 12 August 2026 I started the "Claude 101" course made by Anthropic Academy. Here are some chaotic notes along the way through the first 4 chapters combined under the "Meet Claude" title. Some of them come from my methodology and tutoring experience.
Chapter "Your first conversation with Claude" implies - never says that, but gives a feeling - that memory feature is always on: "Memory automatically saves key context from your conve…
23 Apr 2026, 13:42 UTC73 views2 reactionsread 12 August 2026 PEP 830 - in Python 3.15, exception objects will include nanosecond‑precision timestamps. The feature carries minimal risk and negligible overhead, and it remains disabled by default.
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6 Apr 2026, 18:36 UTC95 viewsread 12 August 2026 Photo
Today I spent a few hours at the Institute for Informatics and Automation Problems (IIAP) with the CMEL - Computational Molecular Engineering Lab, site: https://www.cmellab.com/ The visit happened thanks to Hrachya Ishkhanyan, with whom I once discussed a Python program for the Armenian Code Academy =3 Thanks to Narek Aslikyan
This time I was joined by Armen, Eduard, and Hayk - marked on the photo - a team with a gr…
2 Apr 2026, 18:38 UTC111 viewsread 12 August 2026 Photo
Python 3: the story of hash and equality dunder methods
I). Python 3.0: a set of previously existed data model rules were enforced to define how objects should be hashed (1). The key idea is that if objects' values are equal, their hashes should also be equal. The reverse is not required - hash collisions are allowed. By default both hash and equality dunders were inherited from the object class, and the default has…
30 Mar 2026, 19:21 UTC57 viewsread 12 August 2026 Аrticle "Alpha-Beta Pruning and Althöfer’s Pathology-Free Negamax Algorithm" by Ashraf M. Abdelbar published on Algorithms (MDPI, ISSN 1999‑4893) examines the correctness and compatibility of alpha–beta pruning with Althöfer’s modification of the negamax algorithm: https://www.mdpi.com/1999-4893/5/4/521
Negamax is a variant of the minimax algorithm designed for symmetric, zero-sum games. Minimax algorithms search fo…
26 Mar 2026, 15:14 UTC58 viewsread 12 August 2026 Photo
I've just finished reading a paper "Exact Algorithms for Maximum Clique: A Computational Study" by Patrick Prosser published on Algorithms (MDPI, ISSN 1999‑4893) on November 19, 2012: https://www.mdpi.com/1999-4893/5/4/545
A clique is a complete subgraph of a graph. Or, in simple terms, imagine a party: a clique is a group of people where everyone knows everyone else.
The paper critically examines several Java impl…
25 Mar 2026, 21:27 UTC55 views2 reactionsread 12 August 2026 Photo
I read the article "A Heuristic Approach for a Real-World Electric Vehicle Routing Problem" by Mengting Zhao and Yuwei Lu, published in Algorithms (MDPI, ISSN 1999‑4893) on February 20, 2019: https://www.mdpi.com/1999-4893/12/2/45
The authors address an EVRP — the Electric Vehicle Routing Problem — using a hybrid approach that combines ALNS (Adaptive Large Neighborhood Search) with IP (Integer Programming). They beg…
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15 Mar 2026, 15:02 UTC113 views2 reactionsread 12 August 2026 Python 3.15 has a lot of cool features planned on October 2026, and one of them is the ability to use lazy imports.
Lazy import allows to defer the loading and execution of a module until the first time the imported name is used. It can reduce startup time and memory usage, especially for applications with huge dependency graphs.
lazy import pandas as pd
lazy from numpy import inf
The idea was first rejected throu…
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26 Jul 2025, 04:07 UTC411 views4 reactionsread 12 August 2026 Photo
From time to time I dive into small fun projects.
For example, a Python (PyGame + PyGbag) mini-game on cave exploration, playable on PC in browser.
Source code could be found here.
Features:
- WASD motion controls, long-press enabled
- ESC to quit
- Fog of war hides the map
- Player spreads light in a small radius
- Stepping into a new cave increases map scale
- Caves are auto-generated
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5 Apr 2025, 18:28 UTC504 views4 reactionsread 12 August 2026 Photo
I’m happy to share that I’ve obtained a new certification: Finished Computer Science course from CS50!
I nailed harder versions of every project quite fast. Though I really struggled with the idea of the final project and procrastinated for several months. But as my recorder hobby grew - I finally got inspired! As my final project I made a helper tool for me to withstand a daily challenge of playing melodies: FluTab…
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Showing the 12 most recent of 20 posts we hold for @rioran_tech_notes. View and reaction counts are the latest single reading for each post, not a live figure, and a recent post is still accumulating both. A view count marked ≈ was rounded by Telegram before we ever saw it — t.me prints views in full below 1,000 and to three significant figures above, so ≈1,200,000 means somewhere between 1,150,000 and 1,249,999. Unmarked counts are exact. Text is reproduced from the public post preview and truncated for length.