What is an in-memory database and how can I use it with Express?

What is an in-memory database and how can I use it with Express?

An in-memory database stores data in the main memory (RAM) for faster access. You can use it with Express by integrating libraries like Redis or using simple JavaScript objects.

Can you show me a basic example of using an in-memory database with Express?

Sure! Here's a simple example:

const express = require('express');
const app = express();

let database = {};

app.use(express.json());

app.post('/data', (req, res) => {
    const { key, value } = req.body;
    database[key] = value;
    res.send('Data saved!');
});

app.get('/data/:key', (req, res) => {
    const key = req.params.key;
    res.send(database[key] || 'Not found');
});

app.listen(3000, () => {
    console.log('Server running on port 3000');
});

This code sets up a basic Express server with in-memory storage.

What are the advantages of using an in-memory database?

The main advantages include faster data access, reduced latency, and improved performance for read-heavy applications. However, data is lost when the server restarts.