Your Success, Our Mission!
6000+ Careers Transformed.
| const express = require('express'); const app = express(); app.use(express.json()); // Sample database (in-memory) let users = [ { id: 1, name: "Taniya", age: 20 }, { id: 2, name: "Rahul", age: 22 } ]; // PUT: Update user app.put('/users/:id', (req, res) => { const userId = parseInt(req.params.id); const { name, age } = req.body; // Find user const user = users.find(u => u.id === userId); if (!user) { return res.status(404).json({ error: "User not found" }); } // Replace data (full update) user.name = name; user.age = age; res.status(200).json({ message: "User updated successfully", data: user }); }); // Server app.listen(3000, () => { console.log("Server running on port 3000"); }); |
| PUT /users/2 Content-Type: application/json { "name": "Rahul Sharma", "age": 23 } |
| 200 OK { "message": "User updated successfully", "data": { "id": 2, "name": "Rahul Sharma", "age": 23 } } |
To parse incoming JSON data.
| if (!name || !age) { return res.status(400).send("Invalid data"); } |
404 → Resource not found
400 → Bad request
500 → Server error
Calling the same request multiple times → same result
| function validateUser(req, res, next) { const { name, age } = req.body; if (!name || !age) { return res.status(400).json({ error: "Name and age are required" }); } next(); } app.put('/users/:id', validateUser, (req, res) => { const id = parseInt(req.params.id); const user = users.find(u => u.id === id); if (!user) { return res.status(404).send("User not found"); } user.name = req.body.name; user.age = req.body.age; res.send(user); }); |
Top Tutorials
Top 10 Machine Learning Projects with Source Code (Beginner to Advanced)
Explore the Top 10 Machine Learning projects with source code, from beginner to advanced. Learn real-world ML applications, build portfolio-ready projects, and master hands-on skills with step-by-step tutorials from AlmaBetter.
Technologies to Learn in 2026: Building the Future of Innovation
Explore the top technologies to learn in 2026 including Generative AI, Cloud, Cybersecurity, Web3, Data Science, AR/VR, Quantum, RPA, and Green Tech.
aws
This tutorial presents a structured, beginner-focused yet industry-aligned guide to Amazon Web Services, designed specifically for 2026 learning and career requirements
in Bengaluru, India 
All Courses (6)
Master's Degree (2)
Fellowship (2)
Certifications (2)
Code Example (Node.js + Express)
in Bengaluru, India 
