chaiwa-berian

//we could avoid buffering data altogether and only generate the data when the consumer asks for it.
//We can push chunks on-demand by defining a ._read function

//To show that our _read function is only being called when the consumer requests,
//we can modify our readable stream code slightly to add a delay:
var Readable = require('stream').Readable;
var rs = Readable();

var c = 97 - 1;

chaiwa-berian

var Readable = require('stream').Readable;

var rs = new Readable;
rs.push('beep');
rs.push('boop\n');
rs.push(null);          //Tells the consumer that rs is done outputting data

rs.pipe(process.stdout);

chaiwa-berian

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

var server = http.createServer((req, res)=>{
  var stream = fs.createReadStream(__dirname + '/data.txt');
  stream.pipe(res);
});

server.listen(3000);

chaiwa-berian

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

var server = http.createServer((req,res)=>{
  fs.readFile(__dirname + '/data.txt', function(err, data){
    if(err){
      res.end(err);
    }
    res.end(data);
  }

chaiwa-berian

 var obj ={
    prop: (() => { return ( 3 > 4 ? 'yes' : 'no' );})();
   }
 console.log(obj.prop);     //output: no

chaiwa-berian

//We are triggering start but we are catching done
var Job = require('./nodejs_inherit_events_main_job');  //inherit from main Job

var job = new Job();

job.on('done', function(details){                     //Subscribe to the main job's done event
  console.log('Job was completed at', details.completedOn);
  job.removeAllListeners();
});
job.emit('start');                                        //Fire-up the main job

chaiwa-berian

//We emit done and catch start events
var util = require('util');

var Job = function Job(){
  //we will use it later to pass this to a closure
  var job = this;
  
  job.process = function(){
    //emulate the delay of a job async
    setTimeout(function(){

chaiwa-berian

var events = require('events');
var emitter = new events.EventEmitter();

emitter.once('knock', function(){     //subscribe to the event
  console.log('Who\'s there???');
  });
emitter.on('knock', function(){     //subscribe to the event
  console.log('Leave us in peace, please!!!');
  });

chaiwa-berian

console.log('Step: 1');

var startTime = Date.now();
console.log('Start time: ', startTime);
for(let i=1;i<10000000000;i++){
  //Do Nothing
}
var endTime = Date.now();
console.log('Step: 2 started!');
console.log('End Time: ', endTime);

chaiwa-berian

require('http').createServer((req,res)=>res.end("Hey!")).listen(3000,'127.0.0.1');