nodeschool learnyounode node.js module FILTER LS exercise

Question

Below is the exercise 5 of nodeschool learnyounode module

Create a program that prints a list of files in a given directory, filtered by he extension of the files. You w

Answer 1

Heres what I came up with, if you want other solutions to problem:

var fs = require('fs');
var path = process.argv[2]; //first argument
var extension = process.argv[3]; //second argument
var re = new RegExp("."+extension, "g"); //a regexp that matches every string that begins with a dot and is followed by the extension, i.e. .txt

fs.readdir(path, function callback(err, list){ //read the directory
  if (!err) { //if no errors occur run next funtion
    list.forEach(function(val) { //take the list and check every value with the statement below
      if(re.test(val)) { //if the .test() rexexp-function does not match it will return a false, if it does it will return true
        console.log(val); //if it matches console log the value
      }
    });
  }
});