my javascript study code.

study.js

// stdout
var name = "hoge"
console.log("hello "+ name)

// create object
const person = {
	name: ['Bob', 'Smith'],
	age: 33,
	gender: 'male',
	bio: function() {
		return this.name[0] + ' ' + this.name[1] + ' is ' + this.age + ' years old.'
	}
};
console.log(person.name)
console.log(person.name[0])
console.log(person.age)
console.log(person.bio())
console.log(person['name'])

// variable access
var key = 'name'
console.log(person[key])

// constructor function
function Person(name) {
	this.name = name;
	this.greeting = function() {
		return 'Hi! I\'m ' + this.name;
	};
}
let person1 = new Person('Bob');
let person2 = new Person('Sarah');
console.log(person1.greeting());
console.log(person2.greeting());