Miami node.js meetup: a hands-on introduction to node.js

Presentation from this meetup:
http://www.meetup.com/Miami-node-js-Meetup/events/187584832/

Transcript

1. NODE.JS A hands-on introduction
2. LUC CASTERA • Full-stack software developer & entrepreneur • Electrical Engineering: UVA / Georgia Tech • I work at Intellum on TribeSocial • Co-founder of job509.com & visit509.com • luccastera.com
3. MEETUP GOALS • To build and develop a community of node.js experts in Miami that contribute to the global node.js ecosystem • “Learn and build together” • Example: the Seattle Ruby group
4. AGENDA • Introductions • Basic Intro to node.js • Pair Programming • Prize Ceremony
5. INTRODUCTIONS name
 profession
 node.js expertise (beginner, intermediate, advanced)
 why are you here? who do you want to win the world cup?
7. WHAT IS NODE.JS?
8. – nodejs.org “Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non- blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.”
9. – nodejs.org “Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non- blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.”
10. V8
11. SERVER SIDE JAVASCRIPT
12. – nodejs.org “Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non- blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.”
13. LIBUV libuv is a multi-platform support library with a focus on asynchronous I/O.
14. CALLBACKS
16. – nodejs.org “Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non- blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.”
17. TYPICAL BLOCKING SERVER
18. NON-BLOCKING SERVER
19. ADVANTAGES
20. – nodejs.org “Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non- blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.”
21. C10K PROBLEM
22. – nodejs.org “Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non- blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.”
23. NETWORKING LIBRARIES • net • query string • url • UDP • DNS • HTTP(S) • …
25. WHY USE NODE.JS?
26. – nodejs.org “Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non- blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.”
27. – nodejs.org “Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non- blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.”
28. – nodejs.org “Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non- blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.”
29. JAVASCRIPT Low barrier to entry
30. JS EVERYWHERE Our stack: MongoDB, node.js, JSON, Backbone.js
31. STRONG COMMUNITY 80,000+ npm packages
32. MAC, LINUX, AND WINDOWS
33. SMALL & STABLE
34. WELL DOCUMENTED
36. HOW TO USE NODE.JS
37. INSTALLING NODE.JS
38. NPM npm install express
39. DEMO
41. HELLO WORLD
42. Beginner Intermediate Advanced 1. Install node.js 2. Write a program that prints ‘Hello Miami’ to the console 3. Write a web server that says ‘Hello Miami’ at the root URL http://localhost:3000/ 1. Write a web server that says ‘Hello Miami’ at the root URL http://localhost:3000/ 2. Use the cluster module to start a cluster of 4 servers serving the ‘Hello Miami’ app at http://localhost:3000/ 1. Use the cluster module to start a cluster of 4 servers serving the ‘Hello Miami’ app at http://localhost:3000/
44. FAVORITE MODULES • async - avoid callback hell • underscore - JavaScript++ / utility belt • express - small web application framework • connect - middleware framework • mocha - testing (server-side and in browser) • grunt - task runner • sinon - test spies, stubs, and mocks • gleak - global variable leak detection • kue - priority job queue backed by redis • mongoose - mongodb ORM
45. LESSONS LEARNED • calllback(err, data) • jshint is your friend (include in build process) • always use ‘return’ on callback • use streams when you should (.e.g mongoose) • move CPU intensive sections to separate process
46. DEPLOYING NODE • Process handling: fail and restart (upstart, monit) • Use multiple node processes (kue) • Use a load balancer (haproxy) • upstart ulimit gotcha • stunnel for SSH • lock down npm dependencies (or shrinkwrap)
48. PAIR PROGRAMMING Form teams
49. WORLD CUP FEVER! • Write a program that when passed the name of a country, prints out the list of players currently in their national football/soccer team along with their age and current club (comma delimited) • Usage: 
 roster Chile • Output:
 Claudio Bravo, 31, Barcelona
 Eugenio Mena, 28, Santos
 Mauricio Isla, 26, Juventus • Tip: Wikipedia pages URL: 
 http://en.wikipedia.org/wiki/Chile_national_football_team#Current_squad • If you are stuck and want a hint, ask me ;-)