README.md

JSON

    {
    "name": "Eric Clapton",
    "occupation": "Guitar Hero",
    "bands": ["Cream", "Blind Faith"]
    }

JSON (Javascript Object Notation) is a format for data exchange based on the literal notation of Javascript for the representation of objects, arrays, strings, booleans and numbers
^{http://tools.ietf.org/html/rfc4627}
Advantages of this format versus XML :
- It's Lighter (its structure needs less elements that XML), that's why is ideal for AJAX requests
- It's easier to transform to a Javascript object
^{http://ajaxian.com/archives/json-vs-xml-the-debate}
^{Stop Comparing JSON and XML}
Particularities of JSON format vs literal notation of Javascript:
- Pairs key-value always go with double quotes
- JSON can represent 6 types of values: objects, arrays, numbers, strings, booleans and null
- Dates are not recognised as data types
- Numbers cannot be preceeded by 0 (but decimals)
^{http://www.jsonlint.com/}
JSON strings must be converted to Javascript objects so they can be used (and the opposite). To do this we can use:
- eval(): Is note recommended using it directly
- JSON.parse: Converts a JSON string in an Javascript object
- JSON.stringify: Converts a Javascript object into a JSON string
- jQuery.parseJSON: with jQuery we can also do the JSON parse
JSON object (and its methods JSON.parse and JSON.stringify) are available natively in all browsers compatible with ECMAScript 5

^{http://json.parser.online.fr/}
^{https://developer.mozilla.org/En/Using_JSON_in_Firefox}

>>> JSON.parse('{"bar":"new property","baz":3}')
Object { bar="new property", baz=3}

>>> JSON.stringify({ breed: 'Turtle', occupation: 'Ninja' });
"{"breed":"Turtle","occupation":"Ninja"}"