chen199199的专栏

shift：删除原数组第一项，并返回删除元素的值；如果数组为空则返回undefinedvar a = [1,2,3,4,5];var b = a.shift(); //a：[2,3,4,5] b：1unshift：将参数添加到原数组开头，并返回数组的长度var a = [1,2,3,4,5];var b = a.unshift(-2,-1); /

/** function: 日期格式化* format: 格式* return: 返回格式化后的日期* */Date.prototype.format =function(format){ var o = { "M+" : this.getMonth()+1, //month "d+" : this.getDate(), //day

var events=require('events');var eventEmitter=new events.EventEmitter();//创建事件处理程序var connectHandler=function connected(){ console.log('connect success'); eventEmitter.emit('data_received');