JavaScript Constructor

    function Person(first, last, age, gender, interests) {
        this.name = {
            'first': first,
            'last' : last
        };
        this.age = age;
        this.gender = gender;
        this.interests = interests;
        this.bio = function() {
            alert(this.name.first + ' ' + this.name.last + ' is ' + this.age + ' years old. He likes ' + this.interests[0] + ' and ' + this.interests[1] + '.');
        };
        this.greeting = function() {
            alert('Hi! I\'m ' + this.name.first + '.');
        };
    }

    var obj = new Person('apel', 'mahmud', 18,'male', 'Photography')

    console.log(obj.bio());