Coding to learn :: Homework, week 1

homework.md

Task 1

Read the snippet of code below. Can you explain what is going on? How would you use this code to get the person's age?

// A person 'object'
var person = {};

// The person's date of birth (a date 'object')
person.dob = new Date("September 15, 1984");

// The person's age (a function of their date of birth)
person.age = function() {
	// Today's date
	var today = new Date();

	// Time elapsed between today and date of birth, a simple calculation
	var elapsed = today - this.dob;

	// Time elapsed is expressed in milliseconds
	// To return in years, we need to divide by the number of milliseconds in a year
	// We use Math.floor to round this number down to the nearest whole number
	return Math.floor(elapsed / (1000 * 60 * 60 * 24 * 365));
};

Task 2

Now, try and extend the functionality of our person, by giving them the power of speech.

I've started this for you, have a go at filling in the missing piece:

// Let's empower this person with the ability to speak
person.say = function(something) {
	// What goes here?
};

Task 3 (optional)

Have a go at extending the functionality of our person in other ways (a sleep function perhaps?), or adding additional attributes, such as a name.