Learning NodeJS

console.log('HELLO WORLD');

var sum = 0;
for (i = 2; i < process.argv.length; i++) {
	sum += Number(process.argv[i]);
}

console.log(sum);

var fs = require('fs');
lines = fs.readFileSync(process.argv[2]).toString().split('\n').length - 1;

console.log(lines);

var fs = require('fs');
fs.readFile(process.argv[2], 'utf-8', function(err, data) {
	console.log(data.split('\n').length - 1)
})

var fs = require('fs');
var path = require('path');
// var extension = RegExp('.' + process.argv[3]);
var extension = '.' + process.argv[3];
fs.readdir(process.argv[2], function(err, files) {
	if (err) throw err;

	for (var i = 0; i < files.length; i++) {
		/*if (extension.test(files[i])) {
			console.log(files[i]);
		}*/
		if (path.extname(files[i]) === extension) {
			console.log(files[i])
		}
	}
})

var lsmodule = require('./index');

var dirname = process.argv[2];
var ext = process.argv[3];

lsmodule(dirname, ext, function(err, files) {
	for (i = 0; i < files.length; i++) {
		console.log(files[i]);
	}
})

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

module.exports = function(dirname, ext, callback) {
	var extension = '.' + ext;
	fs.readdir(dirname, function(err, files) {
		if (err) {
			callback(err, null);
		} else {
			result = [];
			files.forEach(function(entry) {
				if (path.extname(entry) == extension) {
					result.push(entry);
				}
			})
			callback(null, result);
		}
	})
}

var http = require('http');

http.get(process.argv[2], function(request) {
	request.setEncoding('utf8');
	request.on('data', function(data) {
		console.log(data);
	})
})

var http = require('http');

http.get(process.argv[2], function(request) {
	var result = '';
	request.setEncoding('utf8');
	request.on('data', function(data) {
		result += data;
	})
	request.on('end', function() {
		console.log(result.length);
		console.log(result);
	})
})

var http = require('http');
var bl = require('bl');
var results = [];
var count = 0;

function printResults() {
	for (var i = 0; i < 3; i++) {
		console.log(results[i])
	}
}

for (var i = 0; i < process.argv.length - 2; i++) {
	httpGet(i)
}

function httpGet(index) {
	http.get(process.argv[2 + index], function(response) {
		response.pipe(bl(function(err, data) {
			if (err) throw err;

			results[index] = data.toString()
			count++

			if (count == 3) {
				printResults()
			}
		}))
	})
}

var net = require('net');

function verify(n) {
	return (n < 10 ? '0' + n : n)
}

var server = net.createServer(function(socket) {
	d = new Date();
	s = d.getFullYear() + "-"
		+ verify(d.getMonth() + 1) + "-"
		+ verify(d.getDate()) + " "
		+ verify(d.getHours()) + ":"
		+ verify(d.getMinutes()) + "\n";
	socket.end(s);
})
server.listen(process.argv[2])

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

server = http.createServer(function(req, res) {
	fs.createReadStream(process.argv[3]).pipe(res);
})
server.listen(process.argv[2])

var http = require('http');

var map = require('through2-map');

server = http.createServer(function(req, res) {
	if (req.method == 'POST') {
		req.pipe(map(function(chunk) {
			return chunk.toString().toUpperCase();
		})).pipe(res);
	}
})
server.listen(process.argv[2])

{
	"hour": 14,
	"minute": 23,
	"second": 15
}

{
	"unixtime": 1376136615474
}

var http = require('http')
var url = require('url')

function parsetime(time) {
	return {
		hour: time.getHours(),
		minute: time.getMinutes(),
		second: time.getSeconds()
	}
}

function unixtime(time) {
	return { unixtime: time.getTime() }
}

var server = http.createServer(function(req, res) {
	var parsedUrl = url.parse(req.url, true);
	var time = new Date(parsedUrl.query.iso);
	var result;

	if (/^\/api\/parsetime/.test(req.url)) {
		result = parsetime(time)
	} else if (/^\/api\/unixtime/.test(req.url)) {
		result = unixtime(time)
	}

	if (result) {
		res.writeHead(200, { 'Content-Type': 'application/json' })
		res.end(JSON.stringify(result))
	} else {
		res.writeHead(404)
		res.end()
	}
})
server.listen(process.argv[2])

var express = require('express');
var	cors = require('cors');
var	app = express();

app.set('port', process.env.PORT || process.argv[2]);

app.use(cors());

app.get('/api/parsetime', function(req, res) {
	d = new Date(req.query.iso);
	res.json(
		{
			hour: d.getHours(),
			minute: d.getMinutes(),
			second: d.getSeconds()
		}
	)
})

app.get('/api/unixtime', function(req, res) {
	res.json(
		{
			unixtime: Math.floor((new Date(req.query.iso).getTime()))
		}
	)
})

var server = app.listen(app.get('port'), function() {
	console.log('Server up: http://localhost:' + app.get('port'));
})