(TH Crash Course) Intro to JavaScript

Transcript

1. Intr t JavaScript & jQuery
2. @ Ryhan Hassan
3. Why learn JavaScript? Critical for Web Development. Write once, run anywhere. Asynchronous (non-blocking).
4. Respond to User Input Manipulate Page Content Fetch Data from APIs
5. T l jQuery & Web Inspector
6. Why use jQuery? Simplifies code. Manages cross-browser compatibility. Useful plugins.
7. console.log(“hello world”); hello world function hello() { console.log(“hello world”); } hello(); hello world Functions
8. function addOne(value){ return value + 1; } addOne(4); 5 function addTwo(value){ return addOne(addOne(value)); } addTwo(3); // -> addOne(addOne(3)); 4 Composing Functions
9. count = 10; function incCount(){ count++; console.log(count); } incCount(); 11 Variable Scope
10. count = 10; function incCount(){ var count = 0; count++; console.log(count); } incCount(); 0 Variable Scope
12. Sample Code https://github.com/ryhan/th-javascript-talk
13. 15-237 Course Website http://www.kosbie.net/cmu/fall-12/15-237/ Underscore.js Functional JS http://underscorejs.org