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#68-174页
答案将于一周后更新于本贴,大家可以跟帖写答案看自己对基础知识的掌握程度如何。 跟帖回答案的都应自行思考完成,不然没有任何意义
var arr = [1]; deal = function(arrA, arrB){ return arrA.concat(arrB) }; alert(deal.length); alert(deal(arr, [3, 4])); alert(arr);
var s = "I love fat bats, cat and every Xat", reg = /________/g; //填写此处缺失部分,过滤全部非结尾的Xat / Xats s = s.replace(reg,""); alert(s); //"I love , and every Xat"
var s1 = 'abc', s2 = new String(s1); s1.color = 'blue'; s2.color = 'red'; console.log(s1===s2, s1===s2.toString(), s1===s2.valueOf()); console.log(s1.color, s2.color)
var fruits = ["apple", "grape", "pear", "orange","banana"]; function pickSome(arr,min,max){ //补全此处函数 } alert(pickSome(fruits,2,4)); //随机返回2到4个水果
var P = function(){}; P.prototype.aaa = function(){ alert('ddd') }; var a = new P(), b = new P(); b.prototype = P; b.prototype.aaa = function(){ alert('cc') }; var c = Object.create(null), d = new Object(); console.log(P.__proto__); console.log(P.prototype); console.log(a.__proto__); console.log(a.prototype); console.log(b.prototype); console.log(c.__proto__); console.log(d.__proto__); console.log(Number.__proto__); console.log(Number.prototype); console.log(Function.__proto__); console.log(Function.prototype); console.log(Function.prototype.__proto__); console.log(Object.__proto__); console.log(Object.prototype); console.log(Object.prototype.__proto__);
function a(){ this.ha = 1 } a.haha = 2; a.test = function(){ console.log(this.ha) }; a.prototype.test = function(){ console.log(this.ha); console.log(this.haha) }; a.prototype.test2 = 3; a.test(); console.log(a.test2); var b = new a(); console.log(b.haha); b.test()
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#68-174页
答案将于一周后更新于本贴,大家可以跟帖写答案看自己对基础知识的掌握程度如何。
跟帖回答案的都应自行思考完成,不然没有任何意义
1.说出下述代码的结果:
2.填写下方代码缺失部分:
3.说出下方代码的运行结果:
4.闭上眼睛想一想,数组的方法你一共记得哪些?其中哪些方法是有返回值的呢?
5.补全下方函数:
6.说出下方脚本的执行结果,看看你大概能答对几个:
7.说出下方代码的运行结果:
The text was updated successfully, but these errors were encountered: