having-fun-coding

<script src="/socket.io/socket.io.js"></script>

<script>
  var server = io.connect('http://localhost:8080');

  server.on('question', function(question) {
    insertQuestion(question);
  });
  server.on('answer', function(question, answer) {
       answerQuestion(question, answer);

having-fun-coding

Let's rewrite our cities routes using a Route Instance.

having-fun-coding

The following code has a Dynamic Route that takes a year 
as an argument and returns the city created in that year. 
The problem with our current implementation is that it 
breaks when invalid data is sent on client requests. 
Let's add some basic validation.

having-fun-coding

var express = require('express');
var app = express();
var server = require('http').createServer(app);
var io = require('socket.io').listen(server);

var redis = require('redis');
var redisClient = redis.createClient();

io.sockets.on('connection', function(client) {
  redisClient.lrange("questions", 0, -1, function(err, questions) {

having-fun-coding

Clients can also answer each other's questions, 
so let's build that feature by first listening for
the 'answer' event on the client, which will send us
both the question and answer, which we want to broadcast 
out to the rest of the connected clients.

having-fun-coding

var url = require('url');
var request = require('request');
var express = require('express');
var options = {
  protocol: "http:",
  host: "search.twitter.com",
  pathname: '/search.json',
  query: {
    q: "codeschool"
  }

having-fun-coding

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

 fs.readFile(path, 'utf8', function(err,data) {
  var lines = data.split('\n');
  console.log(lines.length-1);
});

having-fun-coding

var fs = require('fs');
var path = require('path');
var mydir = process.argv[2];
var ext1 = '.' + process.argv[3];
fs.readdir(mydir, function(err, files){
  if(err){
    throw err;
  }
  //console.log(files);
  files.forEach(function(filename){

having-fun-coding

var fs = require('fs');

var thefile = process.argv[2];

var file = fs.readFileSync(thefile);

var contents = file.toString();

console.log(contents.split('\n').length - 1);

having-fun-coding

function plus(x,y) { return x+y };
console.log(process.argv.slice(2).map(Number).reduce(plus));