JS創建自定義類型對象的7種方式

https://blog.csdn.net/longyin0528/article/details/80504282

https://www.cnblogs.com/zhouliang/p/6625029.html

function createIterator (items){
var i =0;
var _add = function() {
var num = items[0]+ items[1];
return num;
};
return {
showadd:function(){
var num_result = _add();
return num_result;
}
}
}
var iterator= createIterator([1,2]);
console.log(iterator.showadd());