learnyounode

gistfile1.txt

// ex1
console.log('HELLO WORLD');

// ex2
var total = 0;

for (i=2; i < process.argv.length; i++) {
  total += Number(process.argv[i]);
}
console.log(total);

// ex3 
var fs = require('fs');
var file = fs.readFileSync(process.argv[2]);
file = file.toString();

var arr = file.split('\n');

console.log(arr.length - 1);

// ex4
var fs = require('fs');

fs.readFile((process.argv[2]), 'utf8', findLines);

function findLines(err, data) {
  var arr = data.split('\n');
  console.log(arr.length - 1);
}

// ex5
var fs = require('fs');
var path = require('path');

fs.readdir(process.argv[2], list);

function list(err, data) {
  var arr = data.filter( function(value) {
      return (('.' + process.argv[3]) === path.extname(value));
  });
  arr.forEach( function(l){
    console.log(l);
  });
}

// ex6 
var read = require('./extension-reader.js')
// console.log(read);

read(process.argv[2], process.argv[3], logg);

function logg(err, data) {
  if (err) {
    console.log('there was an error,' + err);
  } else {
    data.forEach( function(l) {
      console.log(l);
    });
  }
}


// module 


var fs = require('fs');
var path = require('path');

module.exports = function(dir, fileType, callback){
  fs.readdir(dir, function(err, data) {
    if (err) {
      return callback(err);
    }
    var arr = data.filter( function(value) {
        return (('.' + fileType) === path.extname(value));
    });
    callback(null, arr);
  });
}


// ex7 

var http = require('http');
http.get(process.argv[2], logg);

function logg(resp) {
  resp.on('data', logData).setEncoding('utf8');
}

function logData(l){
  console.log(l);
}