Java是一门很好的语言，我可能学的是假JavaScript，哈哈！1.写一个单行评分组件“★★★★★☆☆☆☆☆”.slice(5-rate,10-rate)；定义一个变量rate，取值从1到5，然后执行上面的代码，看图发现插件比较弱。2.如何假装用代码骂人SB(!(~+[])+{})[--[~+""][+[]]*[~+[]]+~~!+[]]+({}+[])[[~!+[]]*~+[]]了解原因请移步：一行可以伪装的JavaScript代码3.如何优雅地使用代码证明自己NB很棒console.log(([][[]]+[])[+!![]]+([]+{})[!+[]+!![]])4.正确的JavaScript错误处理的姿势，我说服你尝试{something}catch(e){window.location.href="//stackoverflow.com/search?q=[js]+"+e.message;}5.从一行代码开始学JavaScript[].forEach.call($$("*"),function(a){a.style.outline="1pxsolid#"+(~~(Math.random()*(1<<24))).toString(16)})被翻译成这样的普通语言Array.prototype.forEach.call(document.querySelectorAll('*'),dom=>dom.style.outline=`1pxsolid#${parseInt(Math.random()*Math.pow(2,24)).toString(16)}`)接下来，看看浏览器控件：神奇的事情发生了6.如何优雅地获得随机数StringMath.random().toString(16).substring(2)Math.random().toString(36).substring(2)7,(10)["toString"]()==="10"解析，请移步：js怪招18、匿名函数自执行这么多写法，你选哪一种呢？我选择去死9.另一种undefined永远不需要将变量的值声明为undefined，因为JavaScript会自动将一个未赋值的变量设置为undefined。所有如果你在代码中这样写，你会被鄙视的vardata=undefined;但是如果你是强迫症，在声明一个暂时没有值的变量的时候一定要赋值undefined。那你可以考虑这样做：vardata=void0;//undefinedvoid是JavaScript中的一个运算符，不执行传入的操作，返回undefined。void后面可以跟()，比如void(0)，是不是很眼熟？没错，在HTML中用href屏蔽默认的点击操作时，大家都喜欢把href写成javascript:void(0)，其实就是不执行void操作。当然，除了伪装的原因外，void的使用也不利于实际使用，因为void的出现是为了兼容早期ECMAScript标准没有undefined属性。写入void0会使代码变得晦涩难懂。10.关于如何优雅地舍入vara=~~2.33varb=2.33|0varc=2.33>>011.如何优雅地实现货币格式化：1234567890-->1,234,567,890用常规魔法实现：非常规优雅实现：12.我拿这个，你很聪明，我拿这个while(1){alert('Awesomeyoushutmedown')}你很聪明，清除缓存有什么技巧：Clearcache13.逗号运算符vara=0;varb=(a++,99);console.log(a);//1console.log(b);//9914，关于如何用常规方法交换两个整数：vara=1,b=2;a+=b;b=a-b;a-=b;缺点也很明显，Integer数据溢出。对于32位字符，最大个数为2147483647，如果为2147483645和2147483646，则交换失败。黑科技方法：a^=b;b^=a;a^=b;位操作全忘了15.实现标准JSON的深拷贝vara={a:1,b:{c:1,d:2}}varb=JSON.parse(JSON.stringify(a))不考虑在IE的情况下，标准JSON格式的对象相当实用，但undefined和function对象会被忽略。16.不要用Number、parseInt和parseFloat等方法把“1”字符串转成数字哈哈，强制类型转换是不允许的，于是我想到了强大的隐式转换vara=1+a17，如何强行写出”你好世界！”滚动条很长([]+[][(![]+[])[!+[]+!![]+!![]]+([]+{})[+!![]]+(!![]+[])[+!![]]+(!![]+[])[+[]]][([]+{})[!+[]+!![]+!![]+!![]+!![]]+([]+{})[+!![]]+([][[]]+[])[+!![]]+(![]+[])[!+[]+!![]+!![]]+(!![]+[])[+[]]+(!![]+[])[+!![]]+([][[]]+[])[+[]]+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(!![]+[])[+[]]+([]+{})[+!![]]+(!![]+[])[+!![]]]((!![]+[])[+!![]]+([][[]]+[])[!+[]+!![]+!![]]+(!![]+[])[+[]]+([][[]]+[])[+[]]+(!![]+[])[+!![]]+([][[]]+[])[+!![]]+([]+{})[!+[]+!![]+!![]+!![]+!![]+!![]+!![]]+(![]+[])[!+[]+!![]]+([]+{})[+!![]]+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(+{}+[])[+!![]]+(!![]+[])[+[]]+([][[]]+[])[!+[]+!![]+!![]+!![]+!![]]+([]+{})[+!![]]+([][[]]+[])[+!![]])())[+[]]+([][[]]+[])[!+[]+!![]+!![]]+(![]+[])[!+[]+!![]]+(![]+[])[!+[]+!![]]+([]+{})[+!![]]+([]+{})[!+[]+!![]+!![]+!![]+!![]+!![]+!![]]+[][(![]+[])[!+[]+!![]+!![]]+([]+{})[+!![]]+(!![]+[])[+!![]]+(!![]+[])[+[]]][([]+{})[!+[]+!![]+!![]+!![]+!![]]+([]+{})[+!![]]+([][[]]+[])[+!![]]+(![]+[])[!+[]+!![]+!![]]+(!![]+[])[+[]]+(!![]+[])[+!![]]+([][[]]+[])[+[]]+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(!![]+[])[+[]]+([]+{})[+!![]]+(!![]+[])[+!![]]]((!![]+[])[+!![]]+([][[]]+[])[!+[]+!![]+!![]]+(!![]+[])[+[]]+([][[]]+[])[+[]]+(!![]+[])[+!![]]+([][[]]+[])[+!![]]+([]+{})[!+[]+!![]+!![]+!![]+!![]+!![]+!![]]+([][[]]+[])[+[]]+([][[]]+[])[+!![]]+([][[]]+[])[!+[]+!![]+!![]]+(![]+[])[!+[]+!![]+!![]]+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(+{}+[])[+!![]]+([]+[][(![]+[])[!+[]+!![]+!![]]+([]+{})[+!![]]+(!![]+[])[+!![]]+(!![]+[])[+[]]][([]+{})[!+[]+!![]+!![]+!![]+!![]]+([]+{})[+!![]]+([][[]]+[])[+!![]]+(![]+[])[!+[]+!![]+!![]]+(!![]+[])[+[]]+(!![]+[])[+!![]]+([][[]]+[])[+[]]+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(!![]+[])[+[]]+([]+{})[+!![]]+(!![]+[])[+!![]]]((!![]+[])[+!![]]+([][[]]+[])[!+[]+!![]+!![]]+(!![]+[])[+[]]+([][[]]+[])[+[]]+(!![]+[])[+!![]]+([][[]]+[])[+!![]]+([]+{})[!+[]+!![]+!![]+!![]+!![]+!![]+!![]]+(![]+[])[!+[]+!![]]+([]+{})[+!![]]+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(+{}+[])[+!![]]+(!![]+[])[+[]]+([][[]]+[])[!+[]+!![]+!![]+!![]+!![]]+([]+{})[+!![]]+([][[]]+[])[+!![]])())[!+[]+!![]+!![]]+([][[]]+[])[!+[]+!![]+!![]])()([][(![]+[])[!+[]+!![]+!![]]+([]+{})[+!![]]+(!![]+[])[+!![]]+(!![]+[])[+[]]][([]+{})[!+[]+!![]+!![]+!![]+!![]]+([]+{})[+!![]]+([][[]]+[])[+!![]]+(![]+[])[!+[]+!![]+!![]]+(!![]+[])[+[]]+(!![]+[])[+!![]]+([][[]]+[])[+[]]+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(!![]+[])[+[]]+([]+{})[+!![]]+(!![]+[])[+!![]]]((!![]+[])[+!![]]+([][[]]+[])[!+[]+!![]+!![]]+(!![]+[])[+[]]+([][[]]+[])[+[]]+(!![]+[])[+!![]]+([][[]]+[])[+!![]]+([]+{})[!+[]+!![]+!![]+!![]+!![]+!![]+!![]]+([][[]]+[])[!+[]+!![]+!![]]+(![]+[])[!+[]+!![]+!![]]+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(+{}+[])[+!![]]+([]+[][(![]+[])[!+[]+!![]+!![]]+([]+{})[+!![]]+(!![]+[])[+!![]]+(!![]+[])[+[]]][([]+{})[!+[]+!![]+!![]+!![]+!![]]+([]+{})[+!![]]+([][[]]+[])[+!![]]+(![]+[])[!+[]+!![]+!![]]+(!![]+[])[+[]]+(!![]+[])[+!![]]+([][[]]+[])[+[]]+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(!![]+[])[+[]]+([]+{})[+!![]]+(!![]+[])[+!![]]]((!![]+[])[+!![]]+([][[]]+[])[!+[]+!![]+!![]]+(!![]+[])[+[]]+([][[]]+[])[+[]]+(!![]+[])[+!![]]+([][[]]+[])[+!![]]+([]+{})[!+[]+!![]+!![]+!![]+!![]+!![]+!![]]+(![]+[])[!+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