在node.js中的fs.read中指定读取文件中的数据字段

Question

I have read an excel file in node js from fs.read

fs = require('fs')
fs.readFile('/etc/hosts', 'utf8', function (err,data) {
 if (err) {
  return console.log(err);
 }
 console.log(data);
});

I want all data in a specific column from each row of it.

Answer 1

Just replace all newline character with blank string or whatever you want:

fs = require('fs')
fs.readFile('/etc/hosts', 'utf8', function (err,data) {
   if (err) {
      return console.log(err);
   }
   console.log(data.replace(/(\r\n|\n|\r)/gm," "));
});

for line break :Windows would be \\r\\n but Linux just uses \\n and Apple uses \\r.

EDITED:

fs = require('fs')
fs.readFile('/etc/hosts', 'utf8', function (err,data) {
   if (err) {
      return console.log(err);
   }
   var rowString=data.split("\n");
   for(var i=0;i<rowString.length;i++){
      var eachData=rowString[i].split(',');
      console.log(eachData[1]);
   }
});

Answer 2

Try the following Code

fs = require('fs')
fs.readFile('/etc/hosts', 'utf8', function (err,data) {
   if (err) {
      return console.log(err);
   }
   var rowString=data.split("\n");
   for(var i=0;i<rowString.length;i++){
      var eachData=rowString[i].split(',');
      console.log(eachData[1]);
   }
});