nodeschool

//console.log('HELLO WORLD')
//console.log(process.argv.slice(2).reduce(function(sum, el) { return sum+parseInt(el, 10);}, 0))
//var fs = require('fs');
//var file = fs.readFileSync(process.argv[2]);
//console.log(file.toString().split('\n').length-1);
//var fs = require('fs');
//fs.readFile(process.argv[2], function(err, data) {
//    if(!err) {
//        console.log(data.toString().split('\n').length-1);
//    }
//});
var fs = require('fs');
var path = require('path');
fs.readdir(process.argv[2], function(err, list) {
    if(!err) {
        list.forEach(function(el, arr, idx) {
            if(path.extname(el) === '.' + process.argv[3]) {
                console.log(el);
            }
        });
    }
});