【Node.js】使用fs module的createReadStream方法產生的物件，其on方法來偵聽open或close事件

var fs = require('fs');
var createRead = fs.createReadStream('0218.txt'); //開啟readStream
createRead.on('close',function(){
    console.log('The file is close');
});
createRead.on('open',function(){
    console.log('The file is open');
});