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);