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Imagine a busy restaurant with different staff roles. app.use() is like the general staff that greets and assists all customers, while app.get() is like a specialized chef who only prepares specific dishes when ordered.The Big PictureIn Express.js, both app.use() and app.get() are methods used for handling requests, but they serve different purposes and behave differently in terms of when and ho..

To create a backend app using Express.js that parses an Excel document and stores the data into a MySQL database hosted on AWS, you need to break down the task into several steps involving setting up the server, parsing the Excel file, and interacting with the MySQL database. Let's walk through each step with technical details and analogies.The Big PictureImagine you are building a system where ..

In an Express.js application, a templating engine generates HTML dynamically, allowing you to embed variables and logic within your HTML pages for dynamic content rendering.The Big PictureThink of a templating engine like a master chef who can prepare a variety of dishes (web pages) from a standard set of ingredients (data). Instead of creating static HTML pages for every possible outcome, the t..

To send a JSON response in Express.js, you can use the res.json() method, which sends a JSON response with the appropriate Content-Type header.The Big PictureImagine a restaurant serving food. The kitchen (server) prepares the food (data) and the waiters (Express.js) deliver it to the customers (clients). In this analogy, sending a JSON response is like presenting the food in a specific format t..

Middleware functions in Express.js are the backbone of handling requests and responses in a web application, enabling flexible and efficient request processing.The Big PictureImagine building a house. Middleware functions in Express.js are like different workers (plumbers, electricians, carpenters) that prepare the house at various stages before it's ready for the occupants (the users). Each wor..