Value Types
- strings (enclosed in double quotes) - Control characters: \" \\ \/ \b \f \n \r \r \t \u four-hex-digits
- numbers (octal and hex formats not supported; integers, real numbers, e notation supported)
- objects
- arrays
- true
- false
- null
Arrays
["red", "green", "blue"]
Array values are enclosed in square brackets, separated by commas. An array is ordered. An array can contain any type of value. The following array contains two objects.
[{"name": "john, "age": 5}, {"name":"sam", "age": 6.5} ]
Internally, arrays are objects as well (keys are index values, 0,1, ...).
Objects
An object is an unordered set of name/value pairs. Enclosed in curly brackets. Key/values are separated by a colon. Pairs are separated by commas.{
"id": 1000,
"name": "Laptop",
"price": 1200.50,
"available": true,
"discount": false,
"specs" : { "processor": "i7", "graphicscard" : null},
"tags": ["home", "green"]
}
An object may contain values of any supported type. Look for a nested object and an array in the above example.
// iterate through all properties of an object
function objProperties(obj) {
var ret = [];
if (obj) {
for (var property in obj) {
if (obj.hasOwnProperty(property)) {
}
}
}
return ret;
}
JSON processing in js
JSON.stringify turns a Javascript object into JSON text and stores that JSON text in a string.JSON.parse turns a string of JSON text into a Javascript object.
Reference: http://json.org/
