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

The solution given uses the path module from Node JS package. The solution below doesn't use path, instead relies on simple deconstruction of given filename and using the parts needed.

-Import fs module

    var fs = require('fs');

-Extract the path and ext name required from cmd line

    let filePath = process.argv[2];
    let extName = process.argv[3];

-Use (readdir) method to read the contents of a directory. The names of files inside the directory will be returned in the form of an array.

    fs.readdir(filePath, 'utf-8', function(err, data) {
      if (err) throw err;

      data.forEach(element => {

-Take each element and split it into filename and extension name

      let temp = element.split('.');
      let tempSplit = temp[1];
      if(tempSplit === extName) {
        console.log(temp[0] + '.' + temp[1]);
      }
    });

Whole code for reference:

    var fs = require('fs');

    let filePath = process.argv[2];
    let extName = process.argv[3];

    fs.readdir(filePath, 'utf-8', function(err, data) {
      if (err) throw err;

      data.forEach(element => {
      let temp = element.split('.');
      let tempSplit = temp[1];
      if(tempSplit === extName) {
        console.log(temp[0] + '.' + temp[1]);
      }
    });