learnyounode/exercises/filtered_ls/solution/solution.js

Learn You The Node.js For Much Win! An intro to Node.js via a set of self-guided workshops.

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

var folder = process.argv[2]
var ext = '.' + process.argv[3]

fs.readdir(folder, function (err, files) {
  if (err) return console.error(err)
  files.forEach(function (file) {
    if (path.extname(file) === ext) {
      console.log(file)
    }
  })
})