learnyounode

gistfile1.txt

/* challenges */

// HELLO WORLD
// __________________________________________

/* COMPLETED:

console.log('HELLO WORLD');
*/

// BABY STEPS
// __________________________________________

/* COMPLETED:

var result = 0

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

console.log(result)
*/

// MY FIRST I/O!
// __________________________________________

/* COMPLETED:

var fs = require('fs');

var contents = fs.readFileSync(process.argv[2]);
var lines = contents.toString().split('\n').length - 1;
console.log(lines);
*/

// MY FIRST ASYNC I/O!
// __________________________________________

/* COMPLETED:

var fs = require('fs');
var file = process.argv[2];

fs.readFile(file, function (err, contents) {
	var lines = contents.toString().split('\n').length - 1;
	console.log(lines);
});
*/

// FILTERED LS
// __________________________________________

/* COMPLETED:

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);
		}
	})
});
*/

// MAKE IT MODULAR
// __________________________________________

/* COMPLETED:

var filterFn = require('./lessonsmodule.js');
var dir = process.argv[2];
var filterStr = process.argv[3];

filterFn(dir, filterStr, function (err, list) {
	if (err) {
		return console.error('There was an error:', err);
	}
	
	list.forEach(function (file) {
		console.log(file);
	});
});
*/

// HTTP CLIENT
// __________________________________________

/* COMPLETED:

var http = require('http');

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

// HTTP COLLECT
// __________________________________________

/* COMPLETED:

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

http.get(process.argv[2], function (response) {
	response.pipe(bl(function (err, data) {
	
		if (err) {
			return console.error(err);
		}
		
		data = data.toString();
        console.log(data.length);
        console.log(data);
	}));
});
*/

// JUGGLING ASYNC
// __________________________________________

/* COMPLETED:

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]);
	}
};

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

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

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

for (var i = 0; i < 3; i++) {
      httpGet(i);
}
*/

// TIME SERVER
// __________________________________________

/* COMPLETED:

var net = require('net');

function zeroFill(i) {
	return (i < 10 ? '0' : '') + i;
}

function now () {
	var d = new Date();
	
	return d.getFullYear() + '-'
		+ zeroFill(d.getMonth() + 1) + '-'
		+ zeroFill(d.getDate()) + ' '
		+ zeroFill(d.getHours()) + ':'
		+ zeroFill(d.getMinutes());
}

var server = net.createServer(function (socket) {
	socket.end(now() + '\n');
})

server.listen(Number(process.argv[2]));
*/

// HTTP FILE SERVER
// __________________________________________

/* COMPLETED: 

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

var server = http.createServer(function (req, res) {

	res.writeHead(200, { 'content-type': 'text/plain' });
	fs.createReadStream(process.argv[3]).pipe(res);
	
})

server.listen(Number(process.argv[2]));

*/

// HTTP UPPERCASERER
// __________________________________________

/* COMPLETED:

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

var server = http.createServer(function (req, res) {

	if (req.method != 'POST') {
		return res.end('send me a POST\n');
	}
	
	req.pipe(map(function (chunk) {
		return chunk.toString().toUpperCase();
	})).pipe(res);
	
});

server.listen(Number(process.argv[2]));

*/

// HTTP JSON API SERVER
// __________________________________________

/* COMPLETED:

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 = null;

    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(Number(process.argv[2]));

*/

gistfile2.txt

/* challenges module */

// MAKE IT MODULAR
// __________________________________________

/* COMPLETED:

var fs = require('fs');
var path = require('path');
 
module.exports = function (dir, filterStr, callback) {
 
	fs.readdir(dir, function (err, list) {
		if (err) {
			return callback(err);
		}
	
		list = list.filter(function (file) {
			return path.extname(file) === '.' + filterStr;
		});
 
		callback(null, list);
	});
}
*/