javascript The Definitive Guide Chapter 20 JSON

//20.1 syntax 
// JAVASCRIPT is JSON data supports. 
// JSON may be simply stated value of three types of values ( "hello world") Object ({ "name": "maosi "}) array ([ "A", "B", "C"]) 

//20.1. 2 json objects 

var Person = { "name": "Nicholas", "Age": 29}; 
Person = { 
    "name": "Nicholas", 
    "Age": 29, 
    "School": { 
        "name": "Merrimack College ", 
        " LOCATION ":" North Andover, MA " 
    } 
} 
// JS objects 
var Person = {name:" Nicholas ", Age: 29}; 


//20.1.3 array (js json array with the same syntax) 
var values = [25, 'hi', true];
        ],
jsontext = JSON.stringify(book, ["title", "edition "]); // attribute represents an array of sequence (a sequence of attributes which specify only)
        Edition:. 3, 
        year: 2011 
    }, 
    { 
        "title": "Professnional JavaScript", 
        "the authors": [ 
            "C Zakas Nicholas" 
        ], 
        Edition: 2, 
        year: 2009 
    } 
] 

//20.2 serialization and parsing 

// sequence of 
var = {Book 
    title: "Professional the JavaScript", 
    the authors: [ "C Zakas Nicholas"], 
    Edition:. 3, 
    year: 2011, 
    releaseDate: new new a Date (2011,1,1); 
}; 
var = jsontext the JSON.stringify (Book); 

//20.2.2 serialization options 

// attribute logic processing sequence 
jsontext = JSON.stringify (book, function ( key, value) {
    Switch (Key) { 
        Case "the authors": 
            return value.JSON ( ','); 
        Case "year": 
            return 5000; 
        Case "Edition": 
            return undefined; // undefined is defined herein as the sequence of the string when this field is ignored, the ignore 
        default: 
            return value; 
    } 
   
}); 

// indentation JSON string, the method described above into a row long sequence will JSON string 
jsontext = JSON.stringify (book, null, 4); // the third parameter indicates the number of spaces for each indent level 

the JSON.parse (jsontext, function (Key, value) { 
     IF (Key == 'releaseDate') { 
         return new new a Date (value); // for a particular object restore operation string 
     } 
     the else { 
         return value; 
     } 
});

//20.3 Summary