The Memory (aka Concentration) Game - The Essential Guide to HTML5 - page 159

cx = cx+cardwidth+ margin;

Increment to allow for
card width plus margin

acard.draw();

Draw the card on the
canvas

bcard.draw();

Draw the card on the
canvas

Close the for loop

}

Shuffle();

Shuffle the cards

}

Close the function

function shuffle() {

Header for shuffle
function

var i;

Variable to hold a
reference to a card

var k;

Variable to hold a
reference to a card

var holder;

Variable needed to do
the swap

var dl = deck.length Variable to hold the

number of cards in the
deck

var nt;

Index for the number
of swaps

for (nt=0;nt<3*dl;nt++) { For loop

i = Math.floor(Math.random()*dl);

Get a random card

k = Mathfloor(Math.random()*dl);

Get a random card

Store the info for i

holder = deck[i].info;

deck[i].info = deck[k].info;

Put in i info for k

Put into k what was in
k

deck[k].info = holder;