javascript

CHAPTER 4 ■ CONTROLLING FLOW
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"Jokinen": 30,
"Kane": 30
};
var rocketRichard = ["Ovechkin", "Crosby", "Marleau", "Stamkos"], note = "";
Now let’s order the names in rocketRichard by goals and then by name. To do so, we will use the
sort() method that every array, including rocketRichard, defines so that you can order its elements. We
will cover sort() and other Array methods in the next chapter. So for now, just type carefully!
var topTwenty = {
"Crosby": 49,
"Ovechkin": 48,
"Stamkos": 48,
"Marleau": 43,
"Gaborik": 41,
"Kovalchuk": 40,
"Heatley": 39,
"Semin": 39,
"Parise": 37,
"Burrows": 35,
"Kopitar": 34,
"Ryan": 34,
"Carter": 33,
"Nash": 33,
"Iginla": 32,
"Penner": 32,
"Backstrom": 31,
"Hornqvist": 30,
"Jokinen": 30,
"Kane": 30
};
var rocketRichard = ["Ovechkin", "Crosby", "Marleau", "Stamkos"], note = "";
rocketRichard.sort(function(p1, p2) {
var d = topTwenty[p2] - topTwenty[p1];
if (d !== 0) {
return d;
} else {
return (p1 < p2) ? -1 : 1;
}
});
Now we can code either a for, while, or do while loop to indirectly enumerate members in
topTwenty by way of the member names in rocketRichard. Let’s go with a for loop. This one will build up
a string in note that lists the top four goal scorers. Following the for loop, let’s clip off the ", " from the
end of note with String.slice(), a method we covered in Chapter 2. Then click Run, and verify your work
with Figure 4–17.
var topTwenty = {
"Crosby": 49,
"Ovechkin": 48,
"Stamkos": 48,
"Marleau": 43,
"Gaborik": 41,
"Kovalchuk": 40,