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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.

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October 25, 2026 by Lokendra AI 0

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.

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October 25, 2026 by Lokendra Databases Python 0

Node.js Part 1: What Is Node.js and How to Build Your First Node.js App

Node.js Part 1 banner: What Is Node.js? Your First Node.js App, with the event loop handling files, network and database

What is Node.js? Learn how Node.js runs JavaScript on the server, how the event loop works, and build your first Node.js app and web server step by step.

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October 23, 2026 by Lokendra Backend NodeJS 0

React Part 1: What Is React and How to Build Your First React App

React series Part 1: What Is React? Your First React App, with a React atom and a component tree on a dark navy background

What is React? Learn React in simple words: components, JSX, state and the virtual DOM, then build your first React app with Vite, step by step.

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October 22, 2026 by Lokendra Frontend ReactJS 0

DevOps CI/CD Part 1: What Is DevOps and How Does CI/CD Work?

DevOps CI/CD series Part 1 banner: what is DevOps and how CI/CD works, with the DevOps infinity loop and a git push to deploy pipeline

What is DevOps? Learn DevOps and CI/CD in simple words: the DevOps lifecycle, CI vs CD, pipeline basics, and build your first GitHub Actions pipeline.

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October 21, 2026 by Lokendra DevOps 0

Agentic AI Part 1: What Is Agentic AI and How Do AI Agents Work?

Agentic AI Part 1 banner: an AI agent runs a think, act and observe loop with tools like search, calculator and database

Learn what agentic AI is, how AI agents work with the think-act-observe loop, and build your first tool-calling agent in Python and Node.js. Beginner friendly.

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October 20, 2026 by Lokendra AI 0

Generative AI Part 3: Your First LLM API Calls in Python and Node.js

Generative AI Part 3 banner: your first LLM API calls in Python and Node.js to OpenAI, Claude and Gemini

Make your first LLM API calls in Python and Node.js with OpenAI, Claude and Gemini. Learn API keys, requests, token usage, errors and cost, step by step.

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October 19, 2026 by Lokendra AI 1

Generative AI Part 2: Tokens, Context Windows and Model Parameters

Generative AI series Part 2 banner: text becomes tokens, tokens fill the context window, and an 8B-parameter LLM processes them

Learn what tokens, the LLM context window and model parameters mean, with Python and Node.js code to count tokens, trim chat history and estimate memory.

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October 18, 2026 by Lokendra AI 1

Generative AI Part 1: What Is Generative AI and How Do LLMs Work?

What is generative AI – Generative AI series Part 1 banner showing a prompt turning into tokens, an LLM and generated text

What is generative AI? Learn how LLMs work through next-token prediction, tokens and training, then run your first Python, Node.js and free local model code.

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October 18, 2026 by Lokendra AI 3

Tailwind CSS v4 Tutorial: Setup, @theme and Upgrading from v3

Tailwind CSS v4 tutorial banner showing @import "tailwindcss" and an @theme block flowing into the Tailwind engine

Learn Tailwind CSS v4 step by step: install with Vite or Next.js, customize with @theme, add dark mode, and upgrade from v3 without breaking your design.

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October 18, 2026 by Lokendra Frontend 0
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Lokendra Prajapati
👋 Hi, I'm Lokendra Prajapati, the developer behind DevDojo 🥋! I write simple, practical tutorials on 🤖 AI, ⚛️ React, ▲ Next.js, 🟢 Node.js and 🐍 Python, with new posts every day to help you learn and build faster. 🚀
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  • Generative AI Part 4 banner: prompt engineering basics with developer rules, user question and examples flowing into an LLM

    AI

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

    October 25, 2026

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

    Databases / Python

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

    October 25, 2026

  • Node.js Part 1 banner: What Is Node.js? Your First Node.js App, with the event loop handling files, network and database

    Backend / NodeJS

    Node.js Part 1: What Is Node.js and How to Build Your First Node.js App

    October 23, 2026

  • React series Part 1: What Is React? Your First React App, with a React atom and a component tree on a dark navy background

    Frontend / ReactJS

    React Part 1: What Is React and How to Build Your First React App

    October 22, 2026

  • DevOps CI/CD series Part 1 banner: what is DevOps and how CI/CD works, with the DevOps infinity loop and a git push to deploy pipeline

    DevOps

    DevOps CI/CD Part 1: What Is DevOps and How Does CI/CD Work?

    October 21, 2026

  • JavaScript

    Mastering JavaScript Promises: A Guide to Asynchronous Programming

    August 12, 2024

  • What is generative AI – Generative AI series Part 1 banner showing a prompt turning into tokens, an LLM and generated text

    AI

    Generative AI Part 1: What Is Generative AI and How Do LLMs Work?

    October 18, 2026

  • Build an MCP Server in TypeScript – diagram of an AI app connecting to an MCP server with database, GitHub API and files

    AI / Backend / NodeJS

    How to Build an MCP Server in TypeScript (2026 Step-by-Step Guide)

    October 3, 2026

  • Python 3.15 new features banner: lazy imports, frozendict, UTF-8 default, Tachyon profiler and sentinel

    Backend / Python

    Python 3.15 New Features: Lazy Imports, frozendict & More

    October 5, 2026

  • AGENTS.md guide banner: one instructions file shared by Codex, Cursor, Copilot and Gemini CLI

    AI / General

    AGENTS.md Guide: How to Write Instructions for AI Coding Agents

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  • Prompt Engineering Basics: Roles, Instructions, Examples says:
    […] What you should know first: read Part 3: Your First...
  • Prompt Engineering Basics: Roles, Instructions, Examples says:
    […] you should know first: read Part 3: Your First LLM...
  • DuckDB 2.0 Tutorial: Fast SQL on CSV, Parquet & JSON says:
    […] raises ResourceInUseException. Give each thread its own con.cursor(). In a...
  • What Is Node.js? Build Your First Node.js App | DevDojo says:
    […] Yes. It is one of the most used backend technologies,...
  • What Is Node.js? Build Your First Node.js App | DevDojo says:
    […] (variables, functions, arrays, objects and arrow functions). If promises still...
  • AGENTS.md AI Agents AI Coding Agents AI for Beginners Backend Development Backend Tutorial CI/CD Codex Continuous Integration CSS Cursor Data Analysis Developer Productivity DevOps DevOps for Beginners Docker DuckDB Event Loop Frontend Tutorial Generative AI GitHub Actions GitHub Copilot JavaScript kubectl Kubernetes LLM Node.js OpenAI API Parquet PostgreSQL Prompt Engineering Pydantic Python React for Beginners ReactJS REST API Series: Generative AI Series: Node.js Series: React SQL SQLModel Tailwind CSS Tokens TypeScript Vite
  • Generative AI Part 4 banner: prompt engineering basics with developer rules, user question and examples flowing into an LLM

    AI

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

    October 25, 2026

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

    Databases / Python

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

    October 25, 2026

  • Node.js Part 1 banner: What Is Node.js? Your First Node.js App, with the event loop handling files, network and database

    Backend / NodeJS

    Node.js Part 1: What Is Node.js and How to Build Your First Node.js App

    October 23, 2026

  • React series Part 1: What Is React? Your First React App, with a React atom and a component tree on a dark navy background

    Frontend / ReactJS

    React Part 1: What Is React and How to Build Your First React App

    October 22, 2026

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