csdiy

🐭 计算机废物自学指北

必学堂 — 把公开课学成通关的游戏化自学工具

Solutions to Hung-yi Lee (李宏毅) Machine Learning course homeworks HW1-HW15 with measured results

ETH Zurich Digital Design & Computer Architecture: SystemVerilog labs building a MIPS/RISC-V processor, verified in simulation

From-scratch C++ implementations of Stanford CS110 (Principles of Computer Systems): Unix v6 filesystem, multiprocessing, stsh shell w/ job control, ThreadPool, RSS aggregator, HTTP proxy+cache, MapReduce — all verified in WSL2.

GAMES101 (Lingqi Yan) — all 8 assignments as CPU software renderers in C++/Eigen: rasterizer, MSAA, Blinn-Phong, Bezier, Whitted ray tracing, BVH, Cornell-box path tracing

From-scratch USTC Computer Graphics (Ligang Liu): image warping, Poisson editing, minimal surface, Tutte/ARAP parameterization, ARAP deformation, QEM simplification, software rasterizer & Monte-Carlo path tracer — CPU Python, real rendered results

Solutions to UC Berkeley CS61B (Data Structures, Java) — including Gitlet (a Git version-control clone) and BYOW — with the official tests passing

Caltech CS122 NanoDB (Java): storage & buffer management, B+tree indexing, SQL translation, query planning/optimization, and transactions

UC Berkeley CS168 Introduction to the Internet — programming projects on reliable transport, routing, and traceroute

Full solutions to UC Berkeley CS188 Pacman AI projects — search, adversarial games, RL, probabilistic inference, and ML, all passing the official autograders

MIT 6.007 Signals and Systems: from-scratch Python for LTI/convolution, Fourier series & transforms, sampling & aliasing, Laplace/z-transforms, filtering, modulation, and feedback — 64 pytest checks, 10 figures

Full-stack BadgerChat for UW-Madison CS571: a JWT REST API with React (web) + React Native (Expo) clients — 79 tests

Full Stack Open (University of Helsinki) core parts 3-8: a running Bloglist full-stack app (Express + Mongoose + JWT REST API, React + React Query + Router SPA) and a Library GraphQL API (Apollo Server v4), 52 tests + live E2E smoke checks.

HIT 哈工大《操作系统》(李治军) hit-oslab labs: real Linux 0.11 kernel modifications (bootloader, syscalls, scheduler trace, semaphores, shared memory, terminal, /proc) verified under Bochs. A csdiy.wiki build.

CPU-only Python/NumPy reimplementation of CMU 15-462/662 Scotty3D: software rasterizer, half-edge MeshEdit (subdivision + QEM), BVH path tracer, and skeletal animation — real renders + measured results

Solutions to UC Berkeley CS170 Efficient Algorithms and Intractable Problems — rigorous homework write-ups plus implemented algorithms and the coding project

Stanford CS144: a full TCP/IP stack in modern C++ (byte stream, reassembler, TCP receiver/sender, network interface, IP router)

Stanford CS143: a complete compiler for the Cool language - lexer, parser, semantic analysis, and MIPS code generation

Runnable local reproductions of ASU CSE365 (pwn.college) Intro to Cybersecurity modules — SUID misuse, pwntools I/O scripting, x86-64 shellcode, gdb, reverse engineering, a 32-bit stack overflow, and a vulnerable Flask app — all verified in WSL2. Educational self-study.