<p>以下Node.js代码片段的输出结果是什么？( )<br/> var EventEmitter = require("events").EventEmitter;<br/> Var er = new EVentEmitter();<br/> var handler1 = function () {<br/> console.log('Called the handler');<br/> er.removeListener('example', handler1); <br/> };<br/> er.on('example', handler1);<br/> er.emit('example');<br/> er.emit('example');</p>
<p> <br/> Called the handler<br/> Called the handler</p>
<p> <br/> Called the handler</p>
<p> <br/> 由于程序出错，不会显示任何输出。</p>
