Learnyounode exercises

program.js

console.log("HELLO WORLD");

program2.js

var inputs = process.argv;
inputs.splice(0,2);

var nums = inputs.map(function(x){
	return +x;
}).reduce(function(acc, val){
	return acc + val;
}, 0);

console.log(nums);

program3.js

var fs = require('fs');

var newLines = fs.readFileSync(process.argv[2], 'utf8').split('\n');
console.log(newLines.length -1);

program4.js

var fs = require('fs');

var numLines = fs.readFile(process.argv[2], 'utf8', function(err, data) {
	if (err) throw err;
	console.log(data.split('\n').length -1);
})

program5.js

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

// console.log(process.argv[2]);
var fileExt = process.argv[3];

var fileList = fs.readdir(process.argv[2], function(err, list){
	if (err) throw err;
	list.forEach(function(file){
		(path.extname(file) == '.' + fileExt) ? console.log(file) : '';
	})
	
});

program6_1.js

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

module.exports = function(dir, fileExt){
	fs.readdir(dir, function(err, list){
		if (err) throw err;
		list.forEach(function(file){
			(path.extname(file) == '.' + fileExt) ? console.log(file) : '';
		})
	})
};

program6_2.js

var fileFilter = require('./program6_1');

fileFilter(process.argv[2], process.argv[3]);