1. JSON Crash Course
Traversy Media

2. What is JSON? JavaScript Object Notation
Lightweight data-interchange format
Based on a subset of JavaScript
Easy to read and write
Often used with AJAX
Can be used with most modern languages

3. Data Types Number: No difference between integer and floats
String: String of Unicode characters. Use double quotes
Boolean: True or false
Array: Ordered list of 0 or more values
Object: Unordered collection of key/value pairs
Null: Empty value

4. JSON Syntax Rules Uses key/value pairs – {“name”:”Brad”}
Uses double quotes around KEY and VALUE
Must use the specified data types
File type is “.json”
MIME type is “Application/json”

5. JSON Example
{ “name”:”Brad Traversy”, “age”: 35, “address”: { “street”:”5 main st”, “city”:”Boston” }, “children”: [“Brianna”, “Nicholas”] }

6. Accessing Values
var person = { "name":“Brad", "age":31, “address":{“city”:“Boston“}}; alert(person.name); // Brad alert(person.address.city); // Boston alert(person["name"]); // Brad