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//method 1
var A = function(name){
    var _name = name;
    
    Object.defineProperty(this, 'name', {get: function(){console.log('get name'); return _name;},
    set:function(e){console.log('set name='+e); _name=e;},
    enumerable: true
    });

    return this;
};

var B = new A('instance1');
var C = new A('instance2');

console.log(B);
console.log(C);

//method 2
var o = {};

Object.defineProperty(o, 'name', {get: function(){console.log('get o.name'); return this._name;},
                                  set:function(e){console.log('set o.name='+e); this._name=e;},
                                  enumerable: true
});
Object.defineProperty(o, 'email', {value:'test@test.ro'});

o.name='adi';
console.log(o.name);
o.email='email@test.ro';
console.log(o.email);

console.log(o);


//method 3

var city = {
    _location : 'X',
	get location () {
    	console.log('get location');
		return this._location;
	},
	set location(val) {
	   console.log('set location');
		this._location = val;
	},
	
	_name : 'defaultName',
	get name () {
    	console.log('get name');
		return this._name;
	},
	set name(val) {
	   console.log('set anme');
		this.name = val;
	}
};
console.log(city.location);
city.location = "Bucharest";
console.log(city.location);
console.log(city.name);
console.log(city);

//method 4

var city = function() {
    var _location = 'X';
    return {
        get location () {
            console.log('get location');
            return _location;
        },
        set location(val) {
            console.log('set location');
            _location = val;
        }
    };
};
var b = new city();
var c = new city();
console.log(b.location);
b.location = "Bucharest";
console.log(b.location);
console.log(b);
console.log(c);