//task-11, et:120 min , at: 0  min
var person1 = {
	firstname: 'Иван',
	lastname: 'Иванов',
	city: 'Киев',
	phone: '+38099-999-99-99',
	birthday: '01-01-1991'
},
person2 = {
	firstname: 'Петр',
	lastname: 'Петров',
	city: 'Москва',
	phone: '+7819-666-66-66',
	birthday: '02-02-1992'
},
person3 = {
	firstname: 'Тихон',
	lastname: 'Тихонов',
	city: 'Петрозаводск',
	phone: '+38077-777-77-77',
	birthday: '03-03-1993'
};

//1
person1.middlename = 'Иванович';
person3.middlename = 'Тихонович';


//2
var users = [];
users = users.concat(person1,person2,person3);

//3

for (i = 0; i <= users.length; i++) {
	for (var key in users[i]) {
		if (users[i].middlename) {
			users[i].fullName = users[i].firstname + ' ' + users[i].middlename + ' ' + users[i].lastname;
		}
		if (!users[i].middlename) {
			users[i].fullName = users[i].firstname + ' ' + users[i].lastname;
		}
		

		
}
}

//4

var $table = $('<table>').appendTo('body').css({'background-color' : '#fff', 'border': '1px solid #000', 'padding' : '10px' }),
	$thead = $('<thead>').appendTo($table),
	$tr = $('<tr>').appendTo($thead);
	//debugger

	for (var k = 0; k < users.length; k++) {
		$tr = $('<tr>').appendTo($table);
		for (var key1 in users[k]) {
			if (!(users[k][key1] == users[k]["firstname"]) && !(users[k][key1] == users[k]["lastname"])  && !(users[k][key1] == users[k]["middlename"])){
			$tr.append('<td>' + users[k][key1]);}
			
		}
	}