Python set comprehensions evaluate immediately; generator expressions are lazy and bind only the outer iterator. Examples show why results diverge after the list changes.
2 min read
Tags
- 162 writings
- since 2023
Summer ’26
A hike through Qingcheng Back Mountain with classmates, covering the ride, the trail, and the small scenes along the way.
19 min read
I toured Wangjiang Pavilion on June 12, but the write-up dragged; weeks later I scraped together what details I could recall and set them down for later.
17 min read
Following Lu You's old route from Qingyang Palace to Baihuatan, through birdsong, lotus flowers, Sichuan opera, and a legend behind the park's name.
8 min read
A walk from Qingyang Palace to Baihuatan, with a tabby cat, bird perches, sluice gates, Canglang Bridge, and old stories of Du Fu, Li Bai, and Chengdu.
16 min read
A late Chengdu afternoon from Sichuan Museum to Huanhua Creek and Du Fu Thatched Cottage, tying a loose walk to Du Fu's brief peace in the city.
21 min read
Move Nushell external completions to Carapace, use choices and user specs to fix missing brew services completions, and keep Fish bridging out of config.
5 min read
Migrating from instant.page to the browser-native Speculation Rules API, with notes on prefetch, prerender, side effects, and Swup/PJAX conflicts.
8 min read
A northwest Chengdu trip through missed tickets, scenic buses, Anlan Bridge, Feishayan, Baopingkou, Guanxian Ancient City, and sleepless Mount Qingcheng.
17 min read
Spring ’26
Design notes on Hexo i18n — filename conventions for language detection, a permalink filter for path-prefix routing, per-language generators, hreflang, and a language switcher.
6 min read
How this site is made: writing workflow, design principles, typography and color, and the build-and-deploy stack.
5 min read
A blog minimalism experiment starting from the article meta bar, tucking fonts, line height, post info, and comments into lighter UI for a quieter page.
5 min read
I didn't want to fight Word again for my thesis. Typst looked like an elegant alternative. Here's how I verified the submission rules, used the template, set up VS Code, and struggled with PDF-to-DOCX conversion.
11 min read
A practical log of diagnosing EdgeOne Pages 404s on Chinese paths, migrating URLs, adding redirects, and preserving wiki links and comments.
7 min read
This article is encrypted
3 min read
A lightweight script that makes the Hexo dev server auto-refresh the browser whenever you save a post.
6 min read
Notes from an afternoon at the Chengdu Botanical Garden, right after my mid-term defense on April 1st.
13 min read
Post-100% musings: Latin naming easter eggs, character writing, and music picks
8 min read
An excellent natural history museum with rich dinosaur fossils and mammal specimens, thoughtful exhibit design and animal mounts — well worth a visit.
11 min read
Coding agents use different project memory files like AGENTS.md, CLAUDE.md, and GEMINI.md. Symlinks let them share one source of truth.
6 min read
Standing alone and prominent above all other hills, with a circumference of over twenty li at its base, overlooking the great sea
12 min read
Adding interactive TUI components to shell scripts with Gum, and caveats when using it in Nushell.
8 min read
February 28 at Qingdao Underwater World, then March 5 at Chengdu Research Base of Giant Panda Breeding.
6 min read
Winter ’25/26
Reading notes on Hermann Hesse's Beneath the Wheel, and how Hans's story mirrors my own years of exam-driven schooling and burnout.
11 min read
With my mother, from Zhushan Xiugu to Stone Gate Temple
11 min read
After macOS 26.4 beta tightened HID permissions, Karabiner-Elements keyboard remapping broke. hidutil plus LaunchAgent is a temporary workaround.
3 min read
Markdown plugins are overkill for simple interactive components. Custom elements give you interactivity without the development friction.
7 min read
Developers often face repetitive coding patterns, ranging from standard if/for structures to Go's error handling or HTML boilerplates. This redundancy is inefficient and error-prone. Snippets offer the optimal solution. When you type a short prefix (e.g., if, for), your IDE suggests a completion item that can be expanded into a predefined code template.
6 min read
This article is encrypted
5 min read
Why is it called a Radio Button, a Breadcrumb, a Toast? These UI terms trace back to car radios, Grimm's fairy tales, and toasters — metaphors early GUI designers borrowed from the real world.
17 min read
Consolidate scattered project commands into a single justfile. Learn how Just simplifies multi-language development workflows with better reusability & documentation.
8 min read
A deep dive into LQIP, BlurHash, ThumbHash, and other progressive image loading strategies for the web.
5 min read
The Job Control chapter of Effective Shell covers task control in Bash. This post shows how the same ideas work in Nushell.
6 min read
A simple CSS technique to keep HTML tables within their containers by controlling table layout and text wrapping.
4 min read
Learn how to fix clickable hyperlinks not working when using tmux in the Ghostty terminal emulator.
3 min read
OpenCode is an open-source AI coding tool with free models like MiniMax 2.1, GLM 4.7, and Grok Code Fast 1. Here are the lessons from my own daily use.
8 min read
A running review of 2025 blog changes, covering Markdown rendering, images, themes, fonts, responsive design, and performance work.
4 min read
Just a running log of 2026.
4 min read
Add a PostBuild step to your static site CI for image compression and CSS/JS minification. This post covers writing a PostBuild script with ESBuild & minify-html.
10 min read
Use bun link to debug local libraries and blog themes without repeatedly publishing and reinstalling packages.
1 min read
Autumn ’25
Use Shiki's styleToClass transformer to move inline styles into reusable CSS classes and reduce highlighted HTML size.
5 min read
I built markdown-it-inline-code on Nov 20–21, 2025 to highlight inline code. This post covers a preview, usage, and the development story.
5 min read
How to manage multiple blog themes with CSS variables and the :where selector, including Shiki syntax highlighting theme switching and a FOUC fix.
8 min read
Fix the common problem where fixed top navbars hide jump targets using scroll-margin-top rule
2 min read
Configure IDEs to recognize Sketchybar module types for Lua autocompletion in VS Code, Neovim, and JetBrains IDEs.
3 min read
This article introduces Music Player Daemon (MPD) and its clients MPC and RMPC for a lightweight, customizable music playback experience on UNIX.
5 min read
Encapsulating cross-platform functions and isolating OS-specific configs using Nushell.
4 min read
Last September I wrote up my Hexo blog performance work. Recently I tackled the remaining issues with another round of optimizations, recorded here as a follow-up.
8 min read
Tmux Popup Display/Menu & Floax Plugin
4 min read
Customize the VS Code status bar with custom CSS, fonts, item ordering, Vim mode colors, and replacement problem icons.
4 min read
ICP filing approved. A quick record of setting up split CDN routing for domestic and international visitors.
6 min read
Batch-compressing media files with Nushell to free up OneDrive space.
14 min read
Summer ’25
A deep dive into inline editing in the terminal — configuring Vi and Emacs keybindings and using an external line editor to speed up your workflow.
3 min read
How Shiki renders inline code, code blocks, and transformer markers in my Hexo blog, for checking styles and layout edge cases.
3 min read
How to set true system-wide environment variables on macOS with a simple Launch Agent and shell script, so GUI apps and every shell see them.
7 min read
How HTTPS secures web traffic, covering symmetric and asymmetric encryption, digital signatures, CA certificates and chain validation, and the TLS handshake.
10 min read
🤖 From physical pixels and CSS pixels to PPI and device pixel ratio, then on to responsive images with rendered vs. intrinsic size and srcset descriptors.
4 min read
A cross-shell fuzzy finder that replaces manual file navigation with intelligent shortcuts. Here's how it works and why it might replace your current setup.
8 min read
A brief walkthrough of how select, poll, and epoll are implemented.
6 min read
Notes from an evening stroll at Jinji Lake on July 1st
3 min read
After picking up lychees, an afternoon photo walk through the Lingering Garden
4 min read
🤖 Optimize LCP with preload, fetchpriority, responsive images and srcset. Covers Sharp image processing, CI/CD automation, and preload hints for better Core Web Vitals.
10 min read
Learn how to enhance VSCode text navigation by setting up EasyMotion with the VSCode Vim extension and LazyVim-like keybindings.
3 min read
Fix apt install errors caused by no free space in /var/cache/apt/archives by locating the full partition and using a temporary cache path.
3 min read
A walkthrough of the five I/O models on Linux, with C and Java implementations.
15 min read
The GIL is not just why Python threads can't use multiple cores. It is CPython's engineering trade-off among refcounting, the object model, and C extensions.
9 min read
Convert wallpapers to specific color schemes such as Catppuccin or Nord with GoWall, and wrap the common command in a small script.
3 min read
Study Python's cached_property decorator, how it stores computed values on instances, and where it fits in Django-style code.
3 min read
🤖 Keycloak's UserInfo endpoint returns 403 Forbidden when the Access Token lacks the `openid` scope. Notes on debugging the error through mozilla_django_oidc logs and fixing it by requesting the token with the right scope.
5 min read
Explore Linux file system architecture through VFS, ext4/XFS, disk structures, kernel tables, inodes, and file descriptors.
4 min read
Spring ’25
Set up a proxy for Git operations, both for HTTP/HTTPS and SSH connections.
2 min read
A look at Git's data structures — objects, references, and branches. These concepts are the foundation for understanding how Git actually works.
10 min read
A quick reference for data structures, basic syntax, and essential APIs in Lua, JavaScript, Go, Python, and Java.
21 min read
May 18th
3 min read
🤖 Transform your Spotify client with custom themes and extensions using Spicetify. This guide walks you through installing Spicetify CLI and Marketplace on Windows, Linux, and MacOS, helping you personalize your music streaming experience with beautiful themes and powerful add-ons. Elevate your desktop aesthetics with minimal effort!
18 min read
Compare Edge, Chrome, and Vivaldi on Android, then configure Edge ad blocking, workspace sync, and useful flags for mobile browsing.
3 min read
Thus I observe the measure of contentment, forsaking ambitions like drifting clouds, building a house and planting trees, free and self-possessed. The ponds suffice for fishing, the harvested grain for farming. Watering the garden and selling vegetables provides for daily meals; tending sheep and brewing cheese awaits the seasons' needs. Filial in devotion, brotherly in bonds — this too is the governance of the unskilled.
5 min read
Visiting Tiger Hill on May 2nd
6 min read
Ubuntu 18.04's glibc is too old for newer VS Code Remote SSH Server and some Node.js binaries. Run the dev environment in Docker and SSH into it.
8 min read
A quick reference for Python data structures and their common operations, from lists and dicts to queues and stacks.
7 min read
Compile and install FastFetch on Ubuntu 18.04 manually, including the steps needed to resolve an outdated CMake version.
3 min read
A practical guide to installing VS Code extensions offline: downloading VSIX files through the official API, installing language packs, handling SSH remote development, and choosing platform-specific packages.
4 min read
Winter ’24/25
Integrate medium-zoom into a Hexo blog to replace image-link jumps with an in-page zoom interaction, including Icarus and PJAX notes.
3 min read
Configure Carapace and Fish as Nushell external completers, with alias normalization and dispatcher logic for smarter CLI completion.
4 min read
Xiaohongshu temple fair; collect Spring Festival Shu stickers and redeem a Spring Festival Little Red Box
2 min read
A tool that bootstraps your dotfiles ⚡️
2 min read
Use VS Code Dev Containers to develop inside Docker, reusing an existing Dockerfile while keeping dependencies isolated and reproducible.
3 min read
December 21, 2024: a travel day from Chengdu to Shanghai and Suzhou before reporting to Momenta.
5 min read
Customize VS Code with Custom CSS and Animations, including themes, fonts, status bar styling, borders, and command palette layout.
3 min read
Notes from designing an Internet checksum lab, covering parallel summation and incremental checksum updates.
6 min read
Understand Python decorators as a design pattern, including first-class functions, simple wrappers, chained decorators, and common uses.
3 min read
Autumn ’24
Notes on local music players, MP3 tag editing, lyric matching, and syncing a music library across Windows and Android.
4 min read
Introduce Variance in Generic Types, Type Erasure, and Related Concepts
7 min read
Enable Windows 11 Start menu widgets for Phone Link, including ViveTool setup, requirements, and a proxy-related connection fix.
3 min read
Build a modern Python workflow from interpreter, virtual env, and dependency management to editor setup and Ruff, with the trade-offs behind each step.
11 min read
The proxy pattern lets one object stand in for another, controlling access to it and adding features like logging, access control, lazy loading, or monitoring without touching the target's core logic.
12 min read
Good tools make good work. My personal setup for terminal, shell, and prompt, plus a list of handy CLI and TUI tools, for reference.
5 min read
From cookies to JWT: how the web works around HTTP's statelessness, and the trade-offs each step inherits.
14 min read
An introduction to Java's PriorityQueue, its API, custom comparators, and the binary min-heap that powers it.
6 min read
Notes on phone home-screen personalization, including color palettes, icon packs, widgets, fonts, and Samsung Theme Park.
3 min read
Optimizations adopted while maintaining this site, from image compression to lazy loading and CDN.
6 min read
Fix OneDrive Business login stalls and download throttling under Clash by configuring bypass domains and Mixin routing rules.
3 min read
This article is encrypted
3 min read
Nine nines return to truth; the trials are complete, and the work is done.
2 min read
Summer ’24
A travel note from Tangdao Bay and May Fourth Square in Qingdao, with stops at Yumingzui Village, the Olympic Sailing Center, and Zhanqiao.
4 min read
This article is encrypted
2 min read
July 29, 2024, Qingdao's new Zhanqiao and Deep Blue Light.
3 min read
Add Live2D models to a Hexo Icarus blog, either by loading CDN scripts directly or deploying local model assets with optional webp optimization.
3 min read
Apache Tomcat is an open-source, lightweight web application server that implements the Java Servlet and JavaServer Pages (JSP) specs and part of Java EE.
6 min read
HTTP is an application-layer protocol for transferring hypermedia documents such as HTML. This post covers request and response messages.
3 min read
MyBatis notes from the Heima Programmer Java Web course, covering core concepts and a Spring Boot CRUD demo.
7 min read
Maven, the project management tool for Java. Covers basic usage including dependency management, the build lifecycle, and multi-module design.
13 min read
Hands-on with Linux network namespaces, from ip link, ARP, and route basics to connecting namespaces with veth pairs and a Linux bridge.
13 min read
I wanted to buy cassia flowers and bring wine aboard, but it is no longer like youth.
2 min read
A sound sleep, quiet and dreamless
1 min read
Shell startup and features, command forms, I/O redirection and pipes, shell variables and quoting, writing and running shell scripts, plus a brief intro to sed and awk.
5 min read
Keep on, keeping on👍👍👍👍👍
2 min read
An introduction to the Linux operating system, file operations, and permission management
8 min read
Scoop is a command-line installer for Windows. This note covers directory structure, installation, common commands, updates, cleanup, and buckets.
4 min read
Spring ’24
Move an installed WSL distribution to another drive by exporting, unregistering, importing, and restoring the default user.
2 min read
File system basics, directory management with FCBs and inodes, file sharing via hard and symbolic links, physical file structures, and free space management.
31 min read
I/O controllers, channels, and control modes (polling, interrupt, DMA); device data structures; disk scheduling (FCFS, SSTF, SCAN, CSCAN); buffering.
30 min read
Learn how git reset and git revert undo commits, move HEAD, affect the staging area and working tree, and preserve or rewrite history.
7 min read
Notes on database application programming; ODBC/JDBC connectivity, the Java Web persistence layer, PL/pgSQL functions and stored procedures, triggers, and cursors.
12 min read
Merge, edit, and clean up commit history with git rebase -i, plus a look at the experimental git history command added in Git 2.54.
6 min read
Database design process and strategies, E-R model elements, entity relationship types, weak entities, CDM/LDM/PDM design, functional dependencies, normal forms, denormalization, and SQL implementation with Power Designer.
11 min read
Causes and necessary conditions of deadlock, plus prevention, avoidance, detection, and recovery, including the Banker's Algorithm.
16 min read
Levels of processor scheduling, scheduling queue models and criteria, scheduling algorithms, and real-time scheduling.
8 min read
Notes on process scheduling triggers, evaluation metrics, and common algorithms such as FCFS, SJF, RR, MLFQ, EDF, and LLF.
4 min read
SQL statement types and data types; DDL for databases, tables, and indexes; DML for insert, update, delete; DQL with sorting, grouping, subqueries, joins; and views.
6 min read
How Java reflection works, how to obtain Class objects, create instances, invoke methods, and read annotations at runtime, plus its performance trade-offs.
7 min read
Threads as the basic unit of scheduling, thread control, synchronization with mutexes, condition variables, and semaphores, and ULT vs KLT.
8 min read
Types of IPC: shared memory, pipes, message-passing systems, mailboxes, and client-server mechanisms like sockets and RPC.
12 min read
Notes on concurrency, parallelism, CPU cores, hardware threads, processes, and threads in operating systems.
2 min read
Notes on common Linux commands, shortcuts, and plugins, plus recommended terminals and shells.
7 min read
Process synchronization in operating systems, covering critical sections, semaphores, hardware synchronization, and classic synchronization problems.
22 min read
Relational model, relation tables, primary keys, foreign keys, compound keys, entity integrity, and referential integrity.
5 min read
Use MGit as a Git client on Android, including installation, cloning, local repositories, URL formats, and SSH key setup.
2 min read
OS process management: precedence graphs and program execution, process description, and process control.
11 min read
An introduction to processes and threads
12 min read
Winter ’23/24
An overview of operating systems, their definition, goals and roles, history, basic characteristics, main functions, and structural design.
9 min read
A database glossary covering structured, unstructured, and semi-structured data, plus relational and NoSQL data models.
4 min read
An introduction to the Stream API introduced in Java 8
10 min read
Single Abstract Method Interfaces are Java functional interfaces. This post explains how to create and use them with lambdas and references.
3 min read
"The New Terrace" mocks Duke Xuan of Wei for seizing his son's bride; "Two Sons Board the Boat" mourns brothers who died for each other.
7 min read
Java is neither pure pass-by-value nor pass-by-reference. The answer hides in a term most discussions miss: call-by-sharing.
7 min read
A hash table looks up data in O(1) time. This post walks through hash tables in the Java ecosystem: the data structure, the put process, and thread safety.
6 min read
An incomplete collection of music references hidden in Cyberpunk 2077 mission names, covering both Chinese and English song references.
4 min read
Database study notes. This post covers SQL functions and constraints.
7 min read
A brief note on using VS Code tasks.json to compile, run, package, and automate common project tasks.
3 min read
Do not say descending a ridge is easy; it tricks travelers into misplaced joy.
4 min read
Database study notes covering core database concepts and basic SQL syntax, including DDL, DML, DQL, and DCL statements.
11 min read
A personal list of VS Code extensions for editing, Markdown, formatting, Git, web development, utilities, and drawing.
2 min read
Scenes From a Marriage-Iris
2 min read
How to set up a C/C++ debug environment in VSCode, with a walkthrough of `task.json` and `launch.json` and sample configurations.
6 min read
Configure PicGo with a GitHub-backed image bed, then use it from Typora and VS Code with custom URLs and upload formats.
2 min read
Autumn ’23
Study notes on Java Generics, covering wildcards, PECS, type inference, and how to design generic classes, interfaces, and methods.
12 min read
This page verifies Ratex rendering for inline formulas, displayed equations, matrices, cases, and integrals.
1 min read
Test Flavoured Markdown Content & HTML Elements with style
1 min read
Preview the custom Markdown components used by this blog theme, with usage notes and source examples.
10 min read
Test various Markdown features including color schemes, math, task lists, callouts, and code blocks.
2 min read
Summer ’23
Tracking the changes of this blog theme