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Notes and pitfalls from the road of learning. I don't chase frequency — every post has to be fully thought through.

Posts: 5
Tags: 13
Last update: 2026.10.10

5 posts

2026.10.106 min

Two-Column Waterfall Layouts and Image Size Governance: Uprooting 'Load-Then-Shift', with Xiaohongshu as the Example

Ninety percent of a waterfall layout's UX problems come from 'unknown image height'. Starting from Xiaohongshu's feed scenario, this article covers the complete solution: the placeholder height formula, greedy column assignment, governance at upload time, and lazy loading.

#Frontend#CSS#Performance

2026.09.225 min

Hash Maps in Business Code: Three Patterns from Xiaohongshu, from Failed Image Loads to Related Notes

Hash maps aren't just about O(1) lookups. Using Xiaohongshu as an example, see how they're applied in real business scenarios: fallbacks for failed image loads, related-note recommendations, and feed deduplication.

#Data Structures#Hash Table#Frontend

2026.08.255 min

Solving N-Queens with DFS: From the Backtracking Framework to Bit Manipulation, in Full Detail

LeetCode 51/52. Using the unified 'one queen per row' perspective, this guide explains the three backtracking decisions, diagonal pruning, and bitwise compression all at once, with complete, runnable TypeScript code.

#Algorithms#Backtracking#LeetCode

2026.08.204 min

How to Migrate from JS to TypeScript Fast: An Incremental Path, Not a Rewrite

No rewrite, no downtime. Migrate a legacy JS project to TypeScript step by step with allowJs + JSDoc + staged strictness, complete with a full tsconfig and a troubleshooting checklist.

#TypeScript#JavaScript#Engineering

2026.08.156 min

Why TypeScript Is Non-Negotiable: A Developer Who Doesn't Know TS Isn't a Programmer

This isn't a hot take—it's an engineering judgment. From million-line codebases to today's hottest AI Agent frameworks, TypeScript has already become the industry's default language. This article makes the case with facts.

#TypeScript#JavaScript#AI