json stringify replacer code example

Example 1: json.stringify parameters

var person={"first_name":"Tony","last_name":"Hawk","age":31};
console.log(JSON.stringify(person , null , 4)); 
//Output:
> "{
    "first_name": "Tony",
    "last_name": "Hawk",
    "age": 31
}"

Example 2: json.stringify file object return {}

// get File Object  
var fileObject = getFile();

// reCreate new Object and set File Data into it
var newObject  = {
   'lastModified'     : fileObject.lastModified,
   'lastModifiedDate' : fileObject.lastModifiedDate,
   'name'             : fileObject.name,
   'size'             : fileObject.size,
   'type'             : fileObject.type
};  

// then use JSON.stringify on new object
JSON.stringify(newObject);