遍历类的所有对象

可以创建一个包含每个实例的数组,如下所示:

function LoopObject() {
    LoopObject.all.push(this);
}
LoopObject.all = [];

function loopObject(){
 this.name = 'test'
};
var list = [], x = new loopObject, y = new loopObject;

list.push(x)
list.push(y)

for ( var i = list.length; i--; ) {
    alert( list[i].name )
}

var allObjects [] = new Array();
function loopObject() {
    ...
    allObjects.push(this);
}

然后我们就可以通过 allObjects 必要时使用 allObjects.length .