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

thats how i solved it

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

var dir = process.argv[2],
    ext = "."+process.argv[3];
function borer(callback){
    fs.readdir(dir,function(err,list){
        if(err){
            console.log(err) 
        }else{
            var row = list.filter((a)=>{
                var regexp = new RegExp(ext+"$","ig") 
                if( a.search(regexp) > -1 ){
                    callback(a)
                }
            })

        }
    })
}
function print(f){
    console.log(f)
}

borer(print)