CodeAcademy - Getting Started with BJ - BJ Deal 'em Up Sec 2/2, Ex 5/7

gistfile1.js

/*
5. Improving getValue

Now that we have getValue in its own function, we can add some more code
there to make our scoring function more accurate.

Right now getValue returns the number of the card itself, so score
effectively returns card1+ card2 and we haven't really improved anything.

For example with card 30, which represents the 4 of clubs, we are giving
out 30 points instead of only 4. We are the worst casino ever.
So how can we get at the true value for a given card? In this case, how
can we translate card30 to 4 points?

What we really want is the remainder when the card is divided by 13, or
card modulo 13. This will give us the points value of the card we have.

(1) Define a function deal that declares a variable card. Assign to card
a random number between 1 and 52. Then return card.

(2) Declare variables card1 and card2. Assign to each variable a random value
by calling the deal function.

(3) Define a function called getValue. It has one parameter card. We want it
to return not card, but the remainder of card divided by 13.

(4) Write a function called score. Use the keyword return and return a score
which is the sum of card1 and card2 passed through the getValue function.
*/

// Our deal function will return a random card
var deal = function() {
	var card = Math.floor(Math.random()*52+1);
	return card;
};

// Deal out our first hand by declaring variables card1 and card2
var card1 = deal();
var card2 = deal();

// Define a function getValue that returns the remainder when card
// is divided by 13
var getValue = function(card) {
	var resultvalue = card % 13;
	return resultvalue;
};

// Return the score of our hand
var score = function() {
	return (getValue(card1) + getValue(card2));
};

console.log("You have cards " + card1 + " and " + card2 +
        " for a score of " + score());