Quiz - The Essential Guide to HTML5 - page 196

Code Explanation

var inbetween = 300;

Variable holding the distance between the original two
columns

var col1 = 20;

Variable holding the horizontal position of the first column

var row1 = 200; Variable holding the vertical position of the first row

var rowsize = 50; Variable holding the height of a row (the block itself and

the spacing) for creation of all the rows

var slots = new Array(nq);

An array variable to hold which slots in the right column
have been filled

function init(){ Start of init function

setupgame();

Invoked setupgame();

} Close of init function

function setupgame() { Start of setupgame function

var i;

Variable used for the for loops

var c; Variable used for the choice of row (inner array) of facts

var s; Variable used for choice of slots

var mx = col1;

Variable holding the horizontal position

var my = row1; Variable holding the initial vertical position

var d;

Variable holding the created html element

var uniqueid; Variable holding the created id

for (i=0;i<facts.length;i++) { Start of a for loop to mark all facts as not being used

facts[i][2] = false;

Set (reset) the third value, index 2, to be false

}

Close the for loop

for (i=0;i<nq;i++) { Start of a for loop to set all the slots to unused