What to expect while building your first nodeJS application
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This document provides an overview of what to expect when building a Node.js application, highlighting potential challenges such as debugging and the importance of managing the event loop effectively. It advises keeping methods small and maintaining code readability to avoid complex issues. Lastly, it notes the reliance on documentation and potential pitfalls of quickly crafted code in a functional programming context.
What to expect while building your first nodeJS application
- 1. Building your first NodeJS Application Here is what to expect!
- 2. NodeJS applications typically Module ALPHA A module mashup. Module BETA This is a typical NodeJS application. Module OMEGA
- 3. BY what to expect I mean this. Things to expect to go wrong! Because good things you would already be expecting .
- 4. NodeJS Debugging NodeJS debugging is one of the things that might evoke a WHAAAATTT response in you. It is quite basic level of debugging in which even the breakpoints need to be added statically to your code. A way to circumvent this is to keep methods and modules small and build loosely coupled modules. If you have been working in a non-functional programming language till now then you better believe in this advice now or you will feel the pain later.
- 5. NodeJS Event Loop From the initial documentation you must have already read about how the NodeJS works and that it has something called an event loop. Well the event loop is something like a double edged sword, if you use it correctly it is friend, otherwise it will cut you.
- 6. NodeJS Event Loop II NodeJS makes use of callbacks for I/O operations. Well let me break this news for you, you should use callbacks even for the CPU intensive operations. Since the Event Loop runs on single thread, if you go on to do huge amounts of processing in the event loop then it would slow the whole application down, not just for one request but for all requests!!! So this makes it imperative that processing in Event Loop is done just to delegate incoming requests to call back based asynchronous processing and kept at the bare minimum if you wish to achieve those juicy throughput numbers in your application.
- 7. NodeJS Remembering Documentations You may not find a good IDE for NodeJS just yet. You will have to rely and remember the documentations a bit more than you did in Java or C++. But since the included code(dependencies) are all in JavaScript, you can just go ahead open that dependency file and have your documentation.
- 8. NodeJS Quickly Crafting Untenable Code NodeJS, well is a framework that supports JavaScript (a functional programming language) for its programming. As in other functional programming languages here also you can create code quickly and that code might become untenable. Example of such a thing happening are incomprehensible use of function compositions, call back hell,. Etc. SO, just stay sharp in keeping your code’s maintainability in check, especially with NodeJS since the code written here uses starkly different lingo that what you might have written for browser.
- 9. Ashish Sharma Find me at @ashish424242 and @kartaa