bad_ex5.js

gistfile1.js

//MY BAD ANSWER
//referenced by http://stackoverflow.com/questions/280634/endswith-in-javascript 
var fs = require('fs');

fs.readdir(process.argv[2],function(err, data) {
	if(err) throw err;
	var dirs = data.toString();
	var files = dirs.split(",");
	for (var i = 0; i < files.length; i++) {
		if (files[i].endsWith("." + process.argv[3]))
			console.log(files[i]);
	}
});

if (typeof String.prototype.endsWith != 'function') {
	String.prototype.endsWith = function(str, suffix) {
		return this.indexOf(suffix, this.length - suffix.length) !== -1;
	}
}

//GOOD ANSER
/*
   var fs = require('fs')
    var path = require('path')
    
    fs.readdir(process.argv[2], function (err, list) {
      list.forEach(function (file) {
        if (path.extname(file) === '.' + process.argv[3])
          console.log(file)
      })
    })
*/