DevDojo - Empowering Developers

React Compiler Tutorial: Stop Writing useMemo and useCallback

React Compiler tutorial banner showing code flowing through the compiler into an automatically memoized app

React Compiler tutorial for beginners: set it up in Vite and Next.js, learn how automatic memoization replaces useMemo and useCallback, and fix common errors.

October 31, 2026 by Lokendra Frontend ReactJS 0

RAG Tutorial: Build a RAG App with Python and pgvector

RAG tutorial banner: documents flow into pgvector, then an AI model returns a grounded answer

Step-by-step RAG tutorial: build a Retrieval-Augmented Generation app with Python, PostgreSQL pgvector and OpenAI embeddings, with runnable code and fixes.

October 31, 2026 by Lokendra AI Databases Python 0

JavaScript Temporal API Tutorial: Dates and Time Zones Done Right

JavaScript Temporal API tutorial banner showing one instant as local times in India, London, New York and Tokyo

Learn the JavaScript Temporal API with runnable examples: plain dates, time zones, daylight saving, durations and moving from Date to Temporal in Node.js 26.

October 31, 2026 by Lokendra Frontend JavaScript NodeJS 0

Node.js Part 2: Modules in Node.js: ES Modules, CommonJS and import/export

Node.js Part 2 banner: Node.js modules, ES Modules vs CommonJS with import, export and require

Learn Node.js modules step by step: ES Modules vs CommonJS, import and export, require and module.exports, .mjs vs .cjs, and how to mix both safely.

October 30, 2026 by Lokendra Backend NodeJS 0

DevOps CI/CD Part 2: Linux and Shell Basics Every DevOps Engineer Needs

DevOps CI/CD Part 2 banner: Linux and shell basics for DevOps – files, permissions, pipes, processes, environment variables and scripts

Learn Linux for DevOps: essential shell commands, file permissions, pipes, environment variables, exit codes and safe bash scripts you can run in CI/CD.

October 30, 2026 by Lokendra DevOps 0

React Part 2: JSX Explained: Writing HTML-Like Code in JavaScript

React Part 2 banner: JSX code turning into a jsx() call and then a heading on the page

Learn JSX in React with simple examples: curly braces, className, fragments, style objects and the common JSX errors beginners make, with runnable code.

October 30, 2026 by Lokendra Frontend ReactJS 0

Agentic AI Part 2: Anatomy of an AI Agent: Models, Tools, Instructions and Memory

Agentic AI Part 2 banner: anatomy of an AI agent with model, tools, instructions and memory around the agent loop

Learn the anatomy of an AI agent: models, tools, instructions and memory, with runnable Python and Node.js code. Agentic AI series Part 2 for beginners.

October 27, 2026 by Lokendra AI 0

Generative AI Part 5: Temperature and Top-p for Controlling Model Output

Generative AI Part 5 banner: temperature, top-p, max tokens and stop sequence dials controlling LLM output

Learn temperature and top-p for LLMs: how sampling works, plus top-k, max tokens, stop sequences and which GPT-6 and Claude models accept them, with code.

October 26, 2026 by Lokendra AI 0

Generative AI Part 4: Prompt Engineering Basics with Roles, Instructions and Examples

Generative AI Part 4 banner: prompt engineering basics with developer rules, user question and examples flowing into an LLM

Learn prompt engineering basics: system and user roles, clear instructions, XML tags, few-shot examples and prompt templates, with Python and Node.js code.

October 25, 2026 by Lokendra AI 1

DuckDB 2.0 Tutorial: Fast SQL on CSV, Parquet and JSON in Python and Node.js

DuckDB 2.0 tutorial banner: CSV, Parquet and JSON files flowing into an in-process SQL engine

DuckDB tutorial for beginners: install DuckDB 2.0, query CSV, Parquet and JSON with SQL in Python and Node.js, and learn what changed in the 2.0 release.

October 25, 2026 by Lokendra Databases Python 0