模块化Javascript代码的两种方式

1.将模块整体放在函数里

function buildMonthNameModule() {
    var names = ["January ", "February", "March", "April", "May ", "June ", "July", "August ", "September ", "October ", "November", "December"];
    function getMonthName(number) {
        return names[number];
    }
    function getMonthNumber(name) {
        for (var number = 0; number < names.length; number++) {
            if (names[number] == name) {
                return number;
            }
        }
    }
    window.getMonthName = getMonthName;
    window.getMonthNumber = getMonthNumber;
}
buildMonthNameModule();

2.模块对象

var days = (function() {
    var names = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"];
    return {
        getDayName: function(number) {
            return names[number];
        },
        getDayNumber: function(name) {
            for (var number = 0; number < names.length; number++) {
                if (names[number] == name) {
                    return number;
                }
            }
        }
    };
})();

 http://eloquentjavascript.net/1st_edition/