IntroductionHello. My name is kayo, and I work at an IT company in Tokyo.This is my story of taking the Tokyo Metropolitan ...

Understand OOP from classes and objects to composition, inheritance, polymorphism, coupling, and cohesion with practical ...

Discover the best programming books in 2026 for software engineering, algorithms, system design, interviews, refactoring, and major programming languages.

Erlang: a programming language built in a Swedish telecom lab in the 1980s, ended up running the biggest messaging app WhatsApp. Told by its co-creator.

Linear algebra, eigenvalues, FFT, Bessel, elliptic, orthogonal polys, geometry, NURBS, numerical quadrature, 3D transfinite interpolation, random numbers, Mersenne ...

It has been a while since the last series. Since I handle multiple programming languages in parallel, my own memory sometimes gets fuzzy about "how much I've explained" or "which language this syntax ...