在此之前先介绍一个逐行读取文件内容NPM：https://github.com/nickewing/line-reader,需要的朋友可以看看。

直接上代码：

function readLines(input, func) { var remaining = ''; input.on('data', function(data) { remaining += data; var index = remaining.indexOf('\n'); while (index > -1) { var line = remaining.substring(0, index); remaining = remaining.substring(index + 1); func(line); index = remaining.indexOf('\n'); } }); input.on('end', function() { if (remaining.length > 0) { func(remaining); } });}function func(data) { container.push(data);}var input = fs.createReadStream(__dirname + '/ip_arr.txt');readLines(input, func);