カウンターオブジェクトと専用関数

ほむ・・・

by ethertank

JavaScript

var counter = {
    count : 0,
    countUp : function() {
        return ++counter.count;
    },
    countDown : function() {
        return --counter.count;
    },
    set : function(n){
        counter.count = n;
    }
};


counter.countUp();
counter.countUp();
document.write(counter.countUp());

counter.set(100);
counter.countDown();
alert(counter.count);