1. Introduction to NodeJS
Zahid Mahir

2. What is NodeJS?
• Event Driven platform for JavaScript
• First released in 2009
• Good for real-time interaction with a website
– Chat applications
– Location tracking
• Bad for CPU intensive tasks
– Predicting the weather

3. Callbacks

4. Events

5. Threads and Scheduling
• Smallest sequence of executable code
• Run multiple threads together via
multithreading
• Threads block
• Threads are managed by a Scheduler

6. Tradition Webserver Example
• Request blog post
• Call to database for post
• Build HTML
• Send response

7. Event Loop
Taken from: http://misclassblog.com/

8. How to Code
• Change to only asynchronous programming
Taken from: Matt Perpick, “Writing Asynchronous JavaScript 101”

9. When to Node
• IO heavy applications
• NOT CPU heavy applications

10. NPM
• Node Package Manager
• Actually stands for “npm is not an acronym”
• Install dependencies
• Install NodeJS applications
• Package and distribute your code

11. Find Me
zahid@zmhr.me
zmhr.me
@zahidmahir
github.com/zahidmahir

12. Thank You