摘要: Array.prototype.sayLength=function(){ console.log(this.length); } let arr = ['a','b','c','d']; arr.name='数组'; Object.defineProperties(arr,{ type:{ val 阅读全文
posted @ 2018-09-25 17:41 菜鸟程序员的总结 阅读(581) 评论(0) 推荐(0)