javascript

CHAPTER 6 ■ FUNCTIONS AND ARRAYS
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Figure 6–17. Reworking the previous sample to use locally defined _bittersweet, _cocoa, and _vanilla
variables rather than _bittersweet, _cocoa, and _vanilla named parameters
Finally, note that, rather than wrapping the self-invocation in parentheses, you will often see the
function expression wrapped in parentheses, which are then followed by the () operator as in the
following sample. Try it, verifying your work with Figure 6–18:
var ChocolateChocolate = null;
(function (_bittersweet, _cocoa, _vanilla) {
ChocolateChocolate = function (bittersweet, cocoa, vanilla) {
this.bittersweet = [1, "cup", bittersweet || _bittersweet];
this.cocoa = [3, "tbs", cocoa || _cocoa];
this.vanilla = [1, "bean", vanilla || _vanilla];
};
})("Ghirardelli", "Callebaut", "Madagascar Bourbon");
ChocolateChocolate.prototype = {
heavyCream: [1, "cup", "Organic Valley"],
halfHalf: [1, "cup", "Organic Valley"],
sugar: [5/8, "cup"],
yolks: [6]
};
var chocolateChocolate = new ChocolateChocolate("Lindt");
console.dir(chocolateChocolate);
ChocolateChocolate.toString();