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Words and Buttons Online: current hiatus and future plans Hello! I’m Oleksandr Kaleniuk. I do Words and Buttons Online. Just not too often lately. Last night...
2nd Jul 2026
1

Words and Buttons Online: current hiatus and future plans

from Words and Buttons Online [alt+shift+b] in programming

2nd Jul 2026
Hello! I’m Oleksandr Kaleniuk. I do Words and Buttons Online. Just not too often lately. Last night reminded me that I probably owe my subscribers a “still alive” message. Literally still alive. So here it is. I’m still alive. As for the site, I haven’t written a new piece for...
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Gauss–Seidel visually explained An interactive demo of the Gauss-Seidel method for solving linear equation systems. When and why...
21st Sep 2025
51

Gauss–Seidel visually explained

from Words and Buttons Online [alt+shift+b] in programming

21st Sep 2025
An interactive demo of the Gauss-Seidel method for solving linear equation systems. When and why does it work? And why, when you flip the equations, it suddenly stop working? You can now play and see.
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Why learn about the golden-section search An interactive demo of bisection search and golden ratio search algorithms. There is also a...
29th Jun 2025
51

Why learn about the golden-section search

from Words and Buttons Online [alt+shift+b] in programming

29th Jun 2025
An interactive demo of bisection search and golden ratio search algorithms. There is also a motivation to learn them both. Spoiler alert! One converges better, and the other has a better computational cost.
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A smooth and sharp image interpolation you probably haven't heard of An image interpolation that gives us a continuous and smooth image, where every interpolated value...
29th Apr 2024
89

A smooth and sharp image interpolation you probably haven't heard of

from Words and Buttons Online [alt+shift+b] in programming

29th Apr 2024
An image interpolation that gives us a continuous and smooth image, where every interpolated value only depends on the four neighboring pixel values. The image becomes smooth, but sharp features remain sharp.
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Rational interpolation Rational interpolation is a step forward from polynomial interpolation towards rational splines....
5th Mar 2024
84

Rational interpolation

from Words and Buttons Online [alt+shift+b] in programming

5th Mar 2024
Rational interpolation is a step forward from polynomial interpolation towards rational splines. With rational interpolation, you can build functions that run through a set of points and also have vertical asymptotes whenever you want. With this capability, you can now model...
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Either your estimates suck or your job does This page uses polynomial modeling to show why software engineering tasks are often impossible to...
19th Sep 2023
111

Either your estimates suck or your job does

from Words and Buttons Online [alt+shift+b] in programming

19th Sep 2023
This page uses polynomial modeling to show why software engineering tasks are often impossible to estimate.
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Static typing isn’t free. Where do you think the C++ angry mob comes from? Type inference works like logic deduction so any program in a statically typed language is two...
28th Jun 2023
73

Static typing isn’t free. Where do you think the C++ angry mob comes from?

from Words and Buttons Online [alt+shift+b] in programming

28th Jun 2023
Type inference works like logic deduction so any program in a statically typed language is two programs. The first one is the thing you sell, and the second – is a model that undergoes some sort of verification every time you run a compiler. This second program, although, often...
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[Renovated] Even if you can't write assembly like a poet, you can read disassembly like a hunter This is a very concise introduction to x86 disassembly. It shows that you probably have all the...
3rd Mar 2023
51

[Renovated] Even if you can't write assembly like a poet, you can read disassembly like a hunter

from Words and Buttons Online [alt+shift+b] in programming

3rd Mar 2023
This is a very concise introduction to x86 disassembly. It shows that you probably have all the skills to start reading disassembly right now even if you thought it was too complicated for you. It really isn't, see it for yourself.
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Why did I write Geometry for programmers This is not an interactive page, it has zero didactic value. It does explain why Words and Buttons...
29th Dec 2022
44

Why did I write Geometry for programmers

from Words and Buttons Online [alt+shift+b] in programming

29th Dec 2022
This is not an interactive page, it has zero didactic value. It does explain why Words and Buttons has been stagnant for a while though. I have been writing a book. Why? Well, visit and see.
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Check if your performance intuition still works with CUDA An interactive quiz about microoptimizations in CUDA. 10 rounds, two pieces of code per each, you...
1st Jun 2021
45

Check if your performance intuition still works with CUDA

from Words and Buttons Online [alt+shift+b] in programming

1st Jun 2021
An interactive quiz about microoptimizations in CUDA. 10 rounds, two pieces of code per each, you get to guess which is the faster.
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