Javascript class and object. know class of object .Iterate over json in javascript.

Mostly that's due to JavaScript being a prototype-based language, as opposed to Java being a class-based one.
Depending on what you need getClass() for, there are several options in JavaScript:

• typeof
• instanceof
• func.prototype, proto.isPrototypeOf
• obj.constructor

A few examples:

function Foo() {}
var foo = new Foo();

typeof foo; // == "object"
typeof Foo; // == "function"

foo instanceof Foo; // == true
foo.constructor; // == Foo

Foo.prototype.isPrototypeOf(foo); // == true
Foo.prototype.bar = function (x) {return x+x;};
foo.bar(21); // == 42

Tip 2:

to iterate over the json object in javasacript.

object_json = {'key1':'this is key1','key2':'this is key2'};

method :1:

for (var key in object_json){

console.log("key: "key+" value: "+ object_json[key]);

}

method: 2:

            

    

via prototype with forEach() which should skip the prototype chain properties:



Object.prototype.each = function(f) {
    var obj = this
    Object.keys(obj).forEach( function(key) { 
        f( key , obj[key] ) 
    });
}


//print all keys and values
var obj = {a:1,b:2,c:3}
obj.each(function(key,value) { console.log(key + " " + value) });
// a 1
// b 2
// c 3

f you work with jQuery, you may use jQuery.each() method. It can be used to seamlessly iterate over both objects and arrays:



$.each(obj, function(key, value) {
    console.log(key, value);
});