Blog

2026년 3월 29일 26 min read

[2026] Node.js Authentication and Security: JWT, bcrypt, Sessions, OAuth

Secure Node.js APIs: hash passwords with bcrypt, issue and verify JWTs, refresh tokens, express-session with Mongo store, Passport Google OAuth, Helmet,...
2026년 3월 29일 24 min read

[2026] Node.js Testing: Jest, Mocha, and Supertest

Test Node.js apps with Jest matchers and mocks, async tests, Supertest for Express APIs, MongoDB memory server, integration tests, coverage thresholds, ...
2026년 3월 29일 24 min read

[2026] Node.js Performance: Clustering, Caching, and Profiling

Node.js performance guide: use clustering for multi-core, Redis and in-memory caching, fix N+1 queries, profiling with --prof and clinic.js, benchmarkin...
2026년 3월 30일 20 min read

[2026] PostgreSQL vs MySQL: Schema, Transactions, Queries & Operations | Practical Comparison

PostgreSQL vs MySQL compared for schema flexibility, ACID, SQL features, replication, and ops—plus Node.js–friendly criteria to pick the right RDBMS for...
2026년 3월 30일 23 min read

[2026] Python Performance Optimization Case Study | 100× Faster Data Processing

From ~10 hours to minutes: profiling a Python CSV pipeline with cProfile, NumPy vectorization, Cython, and multiprocessing—real numbers and trade-offs.
2026년 3월 30일 19 min read

[2026] Python list vs tuple vs set | Mutability, Performance, and How to Choose

Compare Python list, tuple, and set: ordering, duplicates, big-O operations, memory, and a decision flowchart for real code.
2026년 4월 8일 18 min read

[2026] Python pip vs uv vs Poetry 2026 | Speed, Lock Files, Virtual Environments Comparison

Compare pip, uv, and Poetry based on installation speed, lock files, virtual environments, and pyproject. Presents practical setup patterns for 2026 wit...
2026년 3월 28일 16 min read

[2026] Python Environment Setup | Install on Windows & Mac and Get Started

Set up Python on Windows/Mac/Linux: install Python 3, pip, venv, VS Code, PyCharm, requirements.txt, Poetry, and a clean project layout for beginners.
2026년 3월 28일 15 min read

[2026] Python Basics | Variables, Operators, Conditionals, and Loops — Complete Guide

Learn Python syntax: variables, operators, if/elif/else, for/while loops, and indentation. Clear examples for beginners and interview prep.
2026년 3월 28일 18 min read

[2026] Python Data Types | Lists, Dictionaries, Tuples, and Sets — Complete Guide

Master Python built-in types: list, dict, tuple, set. Slicing, comprehensions, copying, defaultdict, and performance tips for beginners.