Do you know the newsletter with weekly sharing what happened in the AI or Web development?
I’m trying to find newsletter with analysis what happened for the last week, instead of raw links
#frontend #ai #wevdevelopment #react #nodejs
The `nyc` npm package lets you merge coverage reports from different test jobs into one comprehensive report. Here's how it works:
Tired of slow Jest tests? I cut my test suite time by 67% with these two simple tricks:
1. Add `maxWorkers=50%` to utilize available CPU
2. Implement `shard` to split and run tests in parallel across multiple jobs
The big challenge? Collecting coverage data from separate jobs. Solution below
Senior devs spend 20% of time on code reviews. If you don't, either you're not senior or your team culture needs rework.
Good code reviews:
- Catch bugs before they cause outages
- Share knowledge across the team
- Build better architecture through diverse perspectives
Create a template and do this without thinking :)
For me, it was to have content prepared in advanced
What is your next action when you have an incident and the last PR in the list this one?
Probably author refer to React Server Components where you can render html on server and send it to client.
Nothing wrong with it, because render on server is faster
Confusing by word 'token' when working with AI? Me too 🤔
I spent time understanding how it's calculated, here's simple math:
- Token ≠ word
- 1 word ≈ 1.3token
- 1 tweet ≈ 35 tokens
- Emojis cost extra tokens
shorter words = fewer tokens = lower costs
Skipping tests to save time? Think twice.
While writing tests feels chore, the real cost hits during refactoring.
Use AI for basic tests, but guide it - create mocks & define key scenarios. Keep logic simple, and review all the code produced by AI.
Future you will thank you
You're missing one primary concept when coding with AI.
AI doesn't own the code, the person who approved this code is the owner of the code.
AI is a tool - your expertise in reviewing, validating & owning the implementation is what matters
5/5 Remember: abstract your database logic, centralize configurations, and keep your testing patterns consistent.
4/5 Testing becomes trivial:
- Unit tests: mock DataService
- E2E: use TestDatabaseService with Fishery
- No need to mock individual repositories
- Clean, reusable test data
3/5 Core components:
1. Base Repository - shared database operations
2. Entities - database structure
3. DataService - single entry point
4. Factories - test data generation
2/5 The key is centralizing all database logic in one place.
Create a data-access module that:
• Acts as a single source of truth
• Handles all database operations
• Provides clean testing interfaces
• Manages multiple databases
1/5 How to manage database access in monorepo with NestJS?
I faced this problem a few times:
• Duplicated database logic
• Multiple connection configurations
• Inconsistent testing patterns
• No clear structure
Let me explain how I fixed this with the Data-Access Pattern 🧵
#NestJS #nodejs #webdevb
🐳 Next.js Docker build tips:
1. Split into build/run stages - speeds up builds & enables layer caching
2. Use non-root user for runtime - prevents root access if app is compromised
#Docker #Nextjs #Webdev
4 ways to adapt AI for business needs:
1. Pre-training: Needs massive data, expensive
2. Prompting: Cost-effective, learn it first!
3. Fine-tuning: 1000+ examples for good results
4. RAG: Use your docs as context
Start simple, scale as needed
#AI #LLM
This is env management I bring for each project. Don't rely on process.env directly - use Zod validation instead.
Type-safe + clear errors = no more missing configs
#TypeScript #WebDev #nodejs
Will AI replace your job? 🤔
AI isn't replacing jobs directly - it's automating tasks. Think of it as a tool that helps process work faster, not a robot employee.
Humans still handle complex cases, AI handles repetitive ones. 🤖
70/30 AI Engineering Rule
The 70/30 rule of AI coding: While AI can scaffold 70% of your code, the crucial 30% requires deep engineering expertise.
Best practice: Use AI as a drafting tool, maintain atomic conversations, and own your code through meaningful review.
#AI #SoftwareDevelopment
But what you use for as AI assistance? (Outside of code editor)
🎨 Building new website? Here's a harsh truth:
Most projects fail not because of dev speed, but waiting for "perfect design"
Quick win:
- Ship minimal design in 2 weeks
- Test with real users
- Iterate based on feedback
Stop guessing what users want.
#buildinpublic
Post-interview clarity hit me hard today 💡
Spent 2 weeks learning algorithms, only to get asked about building an actual product feature. Classic over-preparation for the wrong battle.
Lesson: Always check type of interview you're participating. The interview format tells you what you need to know
For me 2nd looks better. Idk exact reasons but it feels like priority of blocks in the second option is better
Here's the library I used 👇
broadcast-channel https://buff.ly/2UEqfB8
Multiple tabs sending same requests? Been there 🔧
Solution: Leader Election pattern!
- Tabs form a team
- Pick ONE leader tab
- Only leader makes API calls
- If leader closes, new one steps up
Used broadcast-channel lib. Now instead of 5 requests → just 1
#frontend #javascript
Multiple tabs sending same requests? Been there 🔧
Solution: Leader Election pattern!
- Tabs form a team
- Pick ONE leader tab
- Only leader makes API calls
- If leader closes, new one steps up
Used broadcast-channel lib. Now instead of 5 requests → just 1
#frontend #javascript
React's Virtual DOM Explained:
Instead of updating the webpage directly, React uses a lightweight copy (Virtual DOM).
Changes? React:
1. Updates copy
2. Compares versions
3. Updates only what's needed
That's why React is fast ⚡️
#ReactJS #frontend
Discovered today Docker Compose profiles and was surprised.
Instead of juggling multiple docker-compose files for prod/dev/test, just add "profiles: [dev]" to your services and run:
docker compose --profile dev up
Perfect for managing different environments in a single file!
#docker
Good tip! Doing it for a while, sometimes even use it as a task list 🙂
