SlideShare a Scribd company logo
this presentation code is on
https://github.com/gabrielelana/node-examples
gabriele lana
  gabriele.lana@cleancode.it
    twitter: @gabrielelana
         this presentation code is on
https://github.com/gabrielelana/node-examples
why
         node.js?

“Node's goal is to
  provide an easy
   way to build
scalable network
    programs”

           http://nodejs.org/#about
what is
                  node.js?
•   asynchronous i/o framework
•   core in c++ on top of v8
•   rest of it in javascript
•   swiss army knife for network
    related stuffs
•   can handle thousands of
    concurrent connections with
    minimal overhead (cpu/memory)
    on a single process
Single thread
synchronous I/0
Single thread
synchronous I/0
multiple thread
synchronous I/0
multiple thread
synchronous I/0
you can
  “always”
 scale with
  multiple
machines but
  it costs
  you $$$
Nodejs Explained with Examples
but...
what is HE
 doing?
CPU BOUND
          TASKS?


  but...
what is HE
 doing?
CPU BOUND
          TASKS?

             ...OR I/o
  but...       BOUND
what is HE    TASKS?
 doing?
synchronous I/0

function
productsInCart(request,
response)
{




var
db
=
new
Db()




var
user
=
new
User(request)




if
(user.isAuthorized("cart/products"))
{








response.write(












JSON.stringify(
















db.productsInCart(user.cartId())












)








)




}
else
{








response.unauthorized()




}
}
synchronous I/0

function
productsInCart(request,
response)
{




var
db
=
new
Db()




var
user
=
new
User(request)




if
(user.isAuthorized("cart/products"))
{








response.write(












JSON.stringify(
















db.productsInCart(user.cartId())












)








)




}
else
{








response.unauthorized()




}
}
synchronous I/0

function
productsInCart(request,
response)
{




var
db
=
new
Db()




var
user
=
new
User(request)




if
(user.isAuthorized("cart/products"))
{








response.write(












JSON.stringify(
















db.productsInCart(user.cartId())












)








)




}
else
{








response.unauthorized()




}
}
synchronous I/0

function
productsInCart(request,
response)
{




var
db
=
new
Db()




var
user
=
new
User(request)




if
(user.isAuthorized("cart/products"))
{








response.write(












JSON.stringify(
















db.productsInCart(user.cartId())












)








)




}
else
{








response.unauthorized()




}
}
single thread
asynchronous I/0
single source events
  STATES




                      EVENTS
http://www.infoq.com/presentations/Death-by-Accidental-Complexity
single source events
 function
productsInCart(request,
response)
{
 



var
db
=
null,
user
=
null,
...
 



createDb()
 



handle(function(source,
event)
{
 







if
(event["name"]
===
"createDb")
{
 











if
(db
===
null)
{
 















db
=
event.data
 















createUser(request)
 











}
else
{
 















????
 











}
 







}
else
if
(event["name"]
===
"createUser")
{
 











if
(user
===
null)
{
 















user
=
event.data
 















...
 











}
else
{
 















???
 











}
 







...

 







}
else
{
 











source.push(event,
state)
 







}
 



},
"_initial")
 }
asynchronous I/0
  single thread
asynchronous I/0


           I am
       “callback”
         call me
         if you
        need me...
asynchronous I/0
  single thread
asynchronous I/0
multiple source events
     (local state)
STATES




         EVENTS
multiple source events
     (local state)
  function
productsInCart(request,
response)
{
  



createDb(function(db)
{
  







createUser(function(user)
{
  











if
(user.isAuthorized("cart/products")
{
  















response.write(
  



















JSON.stringify(
  























db.productsInCart(user.cartId())
  



















)
  















)
  















response.end()
  











})
else
{
  















response.unauthorized()
  











}
  







})
  



})
  }
multiple source events
     (local state)
  function
productsInCart(request,
response)
{
  



createDb(function(db)
{
  







createUser(function(user)
{
  











if
(user.isAuthorized("cart/products")
{
  















response.write(
  



















JSON.stringify(
  























db.productsInCart(user.cartId())
  



















)
  















)
  















response.end()
  











})
else
{
  















response.unauthorized()
  











}
  







})
  



})
  }
Event Emitter
                         (local state)
var
http
=
require("http")

var
server
=
http.createServer(function(request,
response)
{


response.writeHead(200,
{




"Content-Type":
"plain/text"


})


response.write("Hello
Worldn")


response.end()
})

server.listen(8080)

console.log(">
SERVER
STARTED")



                      01#hello_world/hello_world_server.js
Event Emitter
                         (local state)
var
http
=
require("http")

var
server
=
http.createServer(function(request,
response)
{


response.writeHead(200,
{




"Content-Type":
"plain/text"


})


response.write("Hello
Worldn")


response.end()
})

server.listen(8080)

console.log(">
SERVER
STARTED")



                      01#hello_world/hello_world_server.js
Event Emitter
                         (local state)
var
http
=
require("http")

var
server
=
http.createServer(function(request,
response)
{


response.writeHead(200,
{




"Content-Type":
"plain/text"


})


response.write("Hello
Worldn")


response.end()
})

server.listen(8080)

console.log(">
SERVER
STARTED")



                      01#hello_world/hello_world_server.js
Event Emitter
                         (local state)
var
http
=
require("http")

var
server
=
http.createServer(function(request,
response)
{


response.writeHead(200,
{




"Content-Type":
"plain/text"


})


response.write("Hello
Worldn")


response.end()
})

server.listen(8080)

console.log(">
SERVER
STARTED")



                      01#hello_world/hello_world_server.js
Event Emitter
                                (local state)
coder@apollo:~/Work/src/node/examples$ node hello_world_server.js
> SERVER STARTED
                                                                    #1
coder@apollo:~$ curl "http://localhost:8080/"
Hello World
                                                                    #2
Event Emitter
                         (local state)
var
server
=
require("http").createServer()

server.on("request",
function(request,
response)
{


console.log(">
REQUEST
STARTED")


request.on("end",
function()
{




console.log(">
REQUEST
CLOSED")




response.writeHead(200,
{






"Content-Type":
"plain/text"




})




response.end("Hello
Worldn")




server.close()


})


response.on("close",
function()
{




console.log(">
RESPONSE
CLOSED")


})
})

              01#hello_world/hello_world_server_emitter.js
Event Emitter
                         (local state)

...

server.on("close",
function()
{


console.log(">
SERVER
CLOSED")
})

server.on("listening",
function()
{


console.log(">
SERVER
STARTED")
})

server.listen(8080)




              01#hello_world/hello_world_server_emitter.js
Event Emitter
                                (local state)
coder@apollo:~/Work/src/node/examples$ node hello_world_server.js
> SERVER STARTED                                                    #1
coder@apollo:~$ curl "http://localhost:8080/"
Hello World                                                         #2
                                                                    #1
> REQUEST STARTED
> REQUEST CLOSED
> SERVER CLOSED
why so
complicated?
data streams
server.on("request",
function(request,
response)
{


var
chunks
=
[],






output
=
fs.createWriteStream("./output")



request.on("data",
function(chunk)
{




chunks
=
forEachLine(chunks.concat(chunk),
function(line)
{






output.write(parseInt(line,
10)
*
2)






output.write("n")




})


})



request.on("end",
function()
{




response.writeHead(200,
{
"Content-Type":
"plain/text"
})




response.end("OKn")




output.end()




server.close()


})
})
                               02#proxy_stream/proxy_stream.js
Event Emitter
                                (local state)
coder@apollo:~/Work/src/node/examples$ node stream_doubler.js
                                                                    #1
coder@apollo:~$ curl "http://localhost:8080/" --data $'1n2n3n'
OK                                                                  #2
coder@apollo:~/Work/src/node/examples$ cat output
2
4
6                                                                   #1
why
                 javascript?


•   Friendly callbacks
•   ubiquitous (well known)
•   no I/o primitives
•   one language to rule them all
web applications
                             before: a web
mind shift #1               server with some
                            application logic


                        application
           Web server
                        application


                        application


                        application
web applications
                        after: an application
mind shift #1             accessible over
                                http

        web server




                     application
web applications
                        after: an application
mind shift #1                 that can
                          communicate and
                         collaborate with
        web server
                             the world




                     application
web applications
                    before: stateful
mind shift #2   • no easy to scale
                • no easy to reuse

                v
                     M
                c
web applications
                    before: stateful
mind shift #2   • no easy to scale
                • no easy to reuse

                v
                     M
                c


  conversation       application
     state             state
web applications
                    before: stateful
mind shift #2   • no easy to scale
                • no easy to reuse

                v
                     M
                c



   tightly coupled
web applications
                    after: stateless
mind shift #2      • easy to scale
                   • easy to reuse


       v
            http
                       M
       c
web applications
                    after: stateless
mind shift #2      • easy to scale
                   • easy to reuse


       v
            http
                       M
       c


conversation       application
   state             state
web applications
                       after: stateless
mind shift #2
                http




                       web server
                                        M
                http

                                     statefull
                                    connection



• easy to scale                                  M
• easy to reuse
no fluff
just stuff
tic - tac - toe
tic - tac - toe



demo
INSTALL NPM
                                   (node packet manager)

coder@apollo:~/Work/src/node/examples$ curl http://npmjs.org/install.sh | sh
...
npm ok
It worked

coder@apollo:~/Work/src/node/examples$ npm list | wc -l
1776

coder@apollo:~/Work/src/node/examples$   npm   install   connect@0.2.5
coder@apollo:~/Work/src/node/examples$   npm   install   faye@0.5.3
coder@apollo:~/Work/src/node/examples$   npm   install   backbone@0.3.0
coder@apollo:~/Work/src/node/examples$   npm   install   underscore@1.1.2
static handler

var
server
=
connect.createServer(connect.logger({
"buffer":
true
}))


.use("/",
connect.router(function(resource)
{




resource.get("/board",
function(request,
response,
next)
{






request.url
=
"/board.html"






next()




})




...


}),
connect.staticProvider({





"root":
path.join(__dirname,
"static"),





"cache":
true



}))

server.listen(port)



                                             05#tictactoe/server.js
game handler
                           (generate board-id)






resource.post("/board",
function(request,
response)
{






response.writeHead(200,
{
"Content-Type":
"application/json"
})






uuid(function(boardId)
{








response.end(










JSON.stringify({












"board":
{
"id":
boardId
}










})








)






})




})




                                             05#tictactoe/server.js
game handler
                              (initial board/user)




resource.get("/board/:id",
function(request,
response)
{






var
board
=
boards.get(request.params["id"])






if
(board
===
undefined)
{








board
=
new
Board({
"id":
request.params["id"]
})








boards.add(board)






}






uuid(function(userId)
{








var
user
=
board.user(userId)








response.writeHead(200,
{
"Content-Type":
"application/json"
})








response.end(










JSON.stringify({












"board":
board,












"user":
user










})








)






})




})
                                                05#tictactoe/server.js
game handler
                                 (make your move)







resource.post("/board/:id",
function(request,
response)
{






waitForBody(request,
function(body)
{








boards.get(request.params["id"]).move(JSON.parse(body))








response.writeHead(204,
{
"Content-Type":
"application/json"
})








response.end(JSON.stringify({
"response":
"ok"
}))






})




})




                                                05#tictactoe/server.js
comet handler

var
comet
=
new
Faye.NodeAdapter({
"mount":
"/comet",
"timeout":
50
})

var
server
=
connect.createServer(connect.logger({
"buffer":
true
}))


.use("/comet",
function(request,
response,
next)
{




comet.handle(request,
response)


})


...
})

comet.attach(server)




                                              05#tictactoe/server.js
comet EVENTS
                       on backbone events



var
client
=
comet.getClient()
var
boards
=
new
Backbone.Collection

boards.bind("change",
function(board)
{


client.publish("/board-"
+
board.get("id"),
board)
})




                                         05#tictactoe/server.js
in browser
                                     routing

$(function()
{



$.sammy(function()
{









this.get("",
function(context)
{






$.post("/board",
function(response)
{








context.redirect("#/board/"
+
response["board"]["id"])






})




})





...


}).run()
})



                                  05#tictactoe/static/board.html
in browser
                                 routing/start game





var
comet
=
new
Faye.Client("/comet")




var
game
=
new
Game()





this.get("#/board/:id",
function(context)
{






game.start()






$.get("/board/"
+
context.params["id"],
function(response)
{








game.set({
"me":
new
User(response.user)
})








game.set({
"board":
new
Board(response.board)
})








comet.connect()








comet.subscribe("/board-"
+
context.params["id"],
function(board)
{










game.get("board").set(board)








})






})




})

                                            05#tictactoe/static/board.html
in browser
                             game logic example




window.Game
=
Backbone.Model.extend({




"initialize":
function()
{






...






game.get("board").bind("change",
function()
{








if
(this.isMyTurn())
{










return
game.trigger("make-your-move")








}








return
game.trigger("wait-for-move")






})




}


})




                               05#tictactoe/static/js/application.js
in browser
                              game logic example




game.bind("play-with-board",
function(cells)
{






buildBoard(['_'].concat(cells))




})





game.bind("play-with-mark",
function(mark)
{






showPlayerMarker(cellMarksUrl[myMark
=
mark])




})




game.bind("make-your-move",
function()
{






$("#board").undelegate()






$("#board").delegate("*[id^=cell]",
"mouseover",
function()
{








$(this).data("cell").select()






})






$("#board").delegate("*[id^=cell]",
"mouseout",
function()
{








$(this).data("cell").unselect()






})






...

                                05#tictactoe/static/js/application.js
What about
cpu bound
  tasks?
the fork
                               be with you


#!/bin/bash

for
count
in
`seq
1
100`;
do




echo
$count




sleep
0.1
done




                03#long_running_jobs/long_running_job.sh
the fork
                                be with you
var
spawn
=
require("child_process").spawn,




server
=
require("http").createServer()

server.on("request",
function(request,
response)
{


var
job
=
spawn("./long_running_job.sh")



job.stdout.on("data",
function(tick)
{




response.write(tick)




})



job.on("exit",
function()
{




response.end()


})
})


              03#long_running_jobs/long_running_server.js
the fork
                                     be with you
coder@apollo:~$ ab -c 1 -n 1 "http://localhost:8080/"
...
Concurrency Level:      1
Time taken for tests:   10.531 seconds
...


coder@apollo:~$ ab -c 1 -n 2 "http://localhost:8080/"
...
Concurrency Level:      1
Time taken for tests:   20.108 seconds
...
the fork
                                     be with you
coder@apollo:~$ ab -c 2 -n 1 "http://localhost:8080/"
...
Concurrency Level:      2
Time taken for tests:   10.634 seconds
...

coder@apollo:~$ ab -c 100 -n 100 "http://localhost:8080/"
...
Concurrency Level:      100
Time taken for tests:   11.198 seconds
...

coder@apollo:~$ ab -c 500 -n 500 "http://localhost:8080/"
...
Concurrency Level:      500
Time taken for tests:   31.082 seconds
...
enter comet


w
 at
 at ch
watch
    ch
                M                spawn
w




                watch
            w




                        w
         t a




                        at
           ch




                            ch
enter comet



demo
static handler

var
port
=
8080

var
server
=
connect.createServer(connect.logger())


.use("/comet",
function(request,
response)
{
...
})


.use("/spawn",
function(request,
response)
{
...
})


.use("/",
connect.staticProvider({





"root":
path.join(__dirname,
"static"),





"cache":
true



}))

comet.attach(server)

server.listen(port)



                            04#progress/progress_server.js
comet handler


var
comet
=
new
Faye.NodeAdapter({


"mount":
"/comet",
"timeout":
50

})

var
server
=
connect.createServer(connect.logger())


.use("/comet",
function(request,
response,
next)
{




comet.handle(request,
response)


})


...




                            04#progress/progress_server.js
spawn handler
var
client
=
comet.getClient(),
jobCounter
=
0

var
server
=
connect.createServer(connect.logger())


.use("/comet",
function(request,
response)
{
...
})


.use("/spawn",
function(request,
response,
next)
{




var
worker
=
spawn("./long_running_process.sh"),








jobId
=
jobsCounter++













response.writeHead(200,
{
"Content-Type":
"plain/text"
})




response.end("OKn")





worker.stdout.on("data",
function(progress)
{






client.publish("/job-progress",
{









"id":
jobId,









"progress":
parseInt(progress.toString(),
10)






})




})


})
                             04#progress/progress_server.js
in browser

<script>


$(function()
{




var
comet
=
new
Faye.Client("/comet")





comet.connect()




comet.subscribe("/job-progress",
function(job)
{






$("#template").progressBar(job.id,
job.progress)




})


})
</script>




                                 04#progress/static/index.html
node.js is
 awesome
 but when
 should i
  use it?
when to use it?

•   chat/messaging
•   real-time applications
•   intelligent proxies
•   high concurrency applications
•   communication hubs
•   coordinators
please tell
me something
 bad about
  node.js
some warnings

•   release stable 0.2.4 (young)
•   lots of stuffs to look at
•   lots of half backed stuffs
•   retro compatibility???
•   bad at handling static contents
•   hard to find organized and
    authoritative informations
Nodejs Explained with Examples
Questions?
gabriele lana
  gabriele.lana@cleancode.it
    twitter: @gabrielelana
         this presentation code is on
https://github.com/gabrielelana/node-examples

More Related Content

What's hot

Node.Js: Basics Concepts and Introduction
Node.Js: Basics Concepts and Introduction Node.Js: Basics Concepts and Introduction
Node.Js: Basics Concepts and Introduction
Kanika Gera
 
Express node js
Express node jsExpress node js
Express node js
Yashprit Singh
 
Express js
Express jsExpress js
Express js
Manav Prasad
 
Nodejs presentation
Nodejs presentationNodejs presentation
Nodejs presentation
Arvind Devaraj
 
Node.js Basics
Node.js Basics Node.js Basics
Node.js Basics
TheCreativedev Blog
 
Workshop 4: NodeJS. Express Framework & MongoDB.
Workshop 4: NodeJS. Express Framework & MongoDB.Workshop 4: NodeJS. Express Framework & MongoDB.
Workshop 4: NodeJS. Express Framework & MongoDB.
Visual Engineering
 
NodeJS - Server Side JS
NodeJS - Server Side JS NodeJS - Server Side JS
NodeJS - Server Side JS
Ganesh Kondal
 
JavaScript Basics and Best Practices - CC FE & UX
JavaScript Basics and Best Practices - CC FE & UXJavaScript Basics and Best Practices - CC FE & UX
JavaScript Basics and Best Practices - CC FE & UX
JWORKS powered by Ordina
 
Introduction to Node js
Introduction to Node jsIntroduction to Node js
Introduction to Node js
Akshay Mathur
 
JavaScript
JavaScriptJavaScript
JavaScript
Vidyut Singhania
 
Node js Introduction
Node js IntroductionNode js Introduction
Node js Introduction
sanskriti agarwal
 
Node.js Express Framework
Node.js Express FrameworkNode.js Express Framework
Node.js Express Framework
TheCreativedev Blog
 
Node js
Node jsNode js
PUC SE Day 2019 - SpringBoot
PUC SE Day 2019 - SpringBootPUC SE Day 2019 - SpringBoot
PUC SE Day 2019 - SpringBoot
Josué Neis
 
Express JS
Express JSExpress JS
Express JS
Designveloper
 
Introduction Node.js
Introduction Node.jsIntroduction Node.js
Introduction Node.js
Erik van Appeldoorn
 
ReactJS presentation
ReactJS presentationReactJS presentation
ReactJS presentation
Thanh Tuong
 
RESTful API In Node Js using Express
RESTful API In Node Js using Express RESTful API In Node Js using Express
RESTful API In Node Js using Express
Jeetendra singh
 
JavaScript - An Introduction
JavaScript - An IntroductionJavaScript - An Introduction
JavaScript - An Introduction
Manvendra Singh
 
Introduction to Spring Boot
Introduction to Spring BootIntroduction to Spring Boot
Introduction to Spring Boot
Purbarun Chakrabarti
 

What's hot (20)

Node.Js: Basics Concepts and Introduction
Node.Js: Basics Concepts and Introduction Node.Js: Basics Concepts and Introduction
Node.Js: Basics Concepts and Introduction
 
Express node js
Express node jsExpress node js
Express node js
 
Express js
Express jsExpress js
Express js
 
Nodejs presentation
Nodejs presentationNodejs presentation
Nodejs presentation
 
Node.js Basics
Node.js Basics Node.js Basics
Node.js Basics
 
Workshop 4: NodeJS. Express Framework & MongoDB.
Workshop 4: NodeJS. Express Framework & MongoDB.Workshop 4: NodeJS. Express Framework & MongoDB.
Workshop 4: NodeJS. Express Framework & MongoDB.
 
NodeJS - Server Side JS
NodeJS - Server Side JS NodeJS - Server Side JS
NodeJS - Server Side JS
 
JavaScript Basics and Best Practices - CC FE & UX
JavaScript Basics and Best Practices - CC FE & UXJavaScript Basics and Best Practices - CC FE & UX
JavaScript Basics and Best Practices - CC FE & UX
 
Introduction to Node js
Introduction to Node jsIntroduction to Node js
Introduction to Node js
 
JavaScript
JavaScriptJavaScript
JavaScript
 
Node js Introduction
Node js IntroductionNode js Introduction
Node js Introduction
 
Node.js Express Framework
Node.js Express FrameworkNode.js Express Framework
Node.js Express Framework
 
Node js
Node jsNode js
Node js
 
PUC SE Day 2019 - SpringBoot
PUC SE Day 2019 - SpringBootPUC SE Day 2019 - SpringBoot
PUC SE Day 2019 - SpringBoot
 
Express JS
Express JSExpress JS
Express JS
 
Introduction Node.js
Introduction Node.jsIntroduction Node.js
Introduction Node.js
 
ReactJS presentation
ReactJS presentationReactJS presentation
ReactJS presentation
 
RESTful API In Node Js using Express
RESTful API In Node Js using Express RESTful API In Node Js using Express
RESTful API In Node Js using Express
 
JavaScript - An Introduction
JavaScript - An IntroductionJavaScript - An Introduction
JavaScript - An Introduction
 
Introduction to Spring Boot
Introduction to Spring BootIntroduction to Spring Boot
Introduction to Spring Boot
 

Similar to Nodejs Explained with Examples

Introduction to Nodejs
Introduction to NodejsIntroduction to Nodejs
Introduction to Nodejs
Gabriele Lana
 
A language for the Internet: Why JavaScript and Node.js is right for Internet...
A language for the Internet: Why JavaScript and Node.js is right for Internet...A language for the Internet: Why JavaScript and Node.js is right for Internet...
A language for the Internet: Why JavaScript and Node.js is right for Internet...
Tom Croucher
 
Writing robust Node.js applications
Writing robust Node.js applicationsWriting robust Node.js applications
Writing robust Node.js applications
Tom Croucher
 
JS everywhere 2011
JS everywhere 2011JS everywhere 2011
JS everywhere 2011
Oleg Podsechin
 
A language for the Internet: Why JavaScript and Node.js is right for Internet...
A language for the Internet: Why JavaScript and Node.js is right for Internet...A language for the Internet: Why JavaScript and Node.js is right for Internet...
A language for the Internet: Why JavaScript and Node.js is right for Internet...
Tom Croucher
 
Node.js - async for the rest of us.
Node.js - async for the rest of us.Node.js - async for the rest of us.
Node.js - async for the rest of us.
Mike Brevoort
 
Original slides from Ryan Dahl's NodeJs intro talk
Original slides from Ryan Dahl's NodeJs intro talkOriginal slides from Ryan Dahl's NodeJs intro talk
Original slides from Ryan Dahl's NodeJs intro talk
Aarti Parikh
 
Play!ng with scala
Play!ng with scalaPlay!ng with scala
Play!ng with scala
Siarzh Miadzvedzeu
 
Ruby MVC from scratch with Rack
Ruby MVC from scratch with RackRuby MVC from scratch with Rack
Ruby MVC from scratch with Rack
DonSchado
 
soft-shake.ch - Hands on Node.js
soft-shake.ch - Hands on Node.jssoft-shake.ch - Hands on Node.js
soft-shake.ch - Hands on Node.js
soft-shake.ch
 
Intro to Node
Intro to NodeIntro to Node
Intro to Node
Aaron Stannard
 
Event-driven IO server-side JavaScript environment based on V8 Engine
Event-driven IO server-side JavaScript environment based on V8 EngineEvent-driven IO server-side JavaScript environment based on V8 Engine
Event-driven IO server-side JavaScript environment based on V8 Engine
Ricardo Silva
 
Server side JavaScript: going all the way
Server side JavaScript: going all the wayServer side JavaScript: going all the way
Server side JavaScript: going all the way
Oleg Podsechin
 
Building web framework with Rack
Building web framework with RackBuilding web framework with Rack
Building web framework with Rack
sickill
 
Event driven programming -- Node.JS
Event driven programming -- Node.JSEvent driven programming -- Node.JS
Event driven programming -- Node.JS
Dimitri Teravanessian
 
Remedie: Building a desktop app with HTTP::Engine, SQLite and jQuery
Remedie: Building a desktop app with HTTP::Engine, SQLite and jQueryRemedie: Building a desktop app with HTTP::Engine, SQLite and jQuery
Remedie: Building a desktop app with HTTP::Engine, SQLite and jQuery
Tatsuhiko Miyagawa
 
Play vs Rails
Play vs RailsPlay vs Rails
Play vs Rails
Daniel Cukier
 
NodeJS
NodeJSNodeJS
NodeJS
Alok Guha
 
Node js presentation
Node js presentationNode js presentation
Node js presentation
martincabrera
 
From Ruby to Node.js
From Ruby to Node.jsFrom Ruby to Node.js
From Ruby to Node.js
jubilem
 

Similar to Nodejs Explained with Examples (20)

Introduction to Nodejs
Introduction to NodejsIntroduction to Nodejs
Introduction to Nodejs
 
A language for the Internet: Why JavaScript and Node.js is right for Internet...
A language for the Internet: Why JavaScript and Node.js is right for Internet...A language for the Internet: Why JavaScript and Node.js is right for Internet...
A language for the Internet: Why JavaScript and Node.js is right for Internet...
 
Writing robust Node.js applications
Writing robust Node.js applicationsWriting robust Node.js applications
Writing robust Node.js applications
 
JS everywhere 2011
JS everywhere 2011JS everywhere 2011
JS everywhere 2011
 
A language for the Internet: Why JavaScript and Node.js is right for Internet...
A language for the Internet: Why JavaScript and Node.js is right for Internet...A language for the Internet: Why JavaScript and Node.js is right for Internet...
A language for the Internet: Why JavaScript and Node.js is right for Internet...
 
Node.js - async for the rest of us.
Node.js - async for the rest of us.Node.js - async for the rest of us.
Node.js - async for the rest of us.
 
Original slides from Ryan Dahl's NodeJs intro talk
Original slides from Ryan Dahl's NodeJs intro talkOriginal slides from Ryan Dahl's NodeJs intro talk
Original slides from Ryan Dahl's NodeJs intro talk
 
Play!ng with scala
Play!ng with scalaPlay!ng with scala
Play!ng with scala
 
Ruby MVC from scratch with Rack
Ruby MVC from scratch with RackRuby MVC from scratch with Rack
Ruby MVC from scratch with Rack
 
soft-shake.ch - Hands on Node.js
soft-shake.ch - Hands on Node.jssoft-shake.ch - Hands on Node.js
soft-shake.ch - Hands on Node.js
 
Intro to Node
Intro to NodeIntro to Node
Intro to Node
 
Event-driven IO server-side JavaScript environment based on V8 Engine
Event-driven IO server-side JavaScript environment based on V8 EngineEvent-driven IO server-side JavaScript environment based on V8 Engine
Event-driven IO server-side JavaScript environment based on V8 Engine
 
Server side JavaScript: going all the way
Server side JavaScript: going all the wayServer side JavaScript: going all the way
Server side JavaScript: going all the way
 
Building web framework with Rack
Building web framework with RackBuilding web framework with Rack
Building web framework with Rack
 
Event driven programming -- Node.JS
Event driven programming -- Node.JSEvent driven programming -- Node.JS
Event driven programming -- Node.JS
 
Remedie: Building a desktop app with HTTP::Engine, SQLite and jQuery
Remedie: Building a desktop app with HTTP::Engine, SQLite and jQueryRemedie: Building a desktop app with HTTP::Engine, SQLite and jQuery
Remedie: Building a desktop app with HTTP::Engine, SQLite and jQuery
 
Play vs Rails
Play vs RailsPlay vs Rails
Play vs Rails
 
NodeJS
NodeJSNodeJS
NodeJS
 
Node js presentation
Node js presentationNode js presentation
Node js presentation
 
From Ruby to Node.js
From Ruby to Node.jsFrom Ruby to Node.js
From Ruby to Node.js
 

More from Gabriele Lana

Microservice Architectures
Microservice ArchitecturesMicroservice Architectures
Microservice Architectures
Gabriele Lana
 
Professional Programmer 2018
Professional Programmer 2018Professional Programmer 2018
Professional Programmer 2018
Gabriele Lana
 
Beyond Phoenix
Beyond PhoenixBeyond Phoenix
Beyond Phoenix
Gabriele Lana
 
Parse Everything With Elixir
Parse Everything With ElixirParse Everything With Elixir
Parse Everything With Elixir
Gabriele Lana
 
The Magic Of Elixir
The Magic Of ElixirThe Magic Of Elixir
The Magic Of Elixir
Gabriele Lana
 
Professional Programmer (3 Years Later)
Professional Programmer (3 Years Later)Professional Programmer (3 Years Later)
Professional Programmer (3 Years Later)
Gabriele Lana
 
Resource Oriented Design
Resource Oriented DesignResource Oriented Design
Resource Oriented Design
Gabriele Lana
 
Agileday Coderetreat 2013
Agileday Coderetreat 2013Agileday Coderetreat 2013
Agileday Coderetreat 2013
Gabriele Lana
 
Milano Legacy Coderetreat 2013
Milano Legacy Coderetreat 2013Milano Legacy Coderetreat 2013
Milano Legacy Coderetreat 2013
Gabriele Lana
 
Minimum Viable Product
Minimum Viable ProductMinimum Viable Product
Minimum Viable Product
Gabriele Lana
 
API Over HTTP
API Over HTTPAPI Over HTTP
API Over HTTP
Gabriele Lana
 
coderetreat
coderetreatcoderetreat
coderetreat
Gabriele Lana
 
Professional Programmer
Professional ProgrammerProfessional Programmer
Professional Programmer
Gabriele Lana
 
It is not supposed to fly but it does
It is not supposed to fly but it doesIt is not supposed to fly but it does
It is not supposed to fly but it does
Gabriele Lana
 
MongoDB With Style
MongoDB With StyleMongoDB With Style
MongoDB With Style
Gabriele Lana
 
Nosql
NosqlNosql
Magic of Ruby
Magic of RubyMagic of Ruby
Magic of Ruby
Gabriele Lana
 
Why couchdb is cool
Why couchdb is coolWhy couchdb is cool
Why couchdb is cool
Gabriele Lana
 
ProgrammingKatas
ProgrammingKatasProgrammingKatas
ProgrammingKatas
Gabriele Lana
 
CouchDB Vs MongoDB
CouchDB Vs MongoDBCouchDB Vs MongoDB
CouchDB Vs MongoDB
Gabriele Lana
 

More from Gabriele Lana (20)

Microservice Architectures
Microservice ArchitecturesMicroservice Architectures
Microservice Architectures
 
Professional Programmer 2018
Professional Programmer 2018Professional Programmer 2018
Professional Programmer 2018
 
Beyond Phoenix
Beyond PhoenixBeyond Phoenix
Beyond Phoenix
 
Parse Everything With Elixir
Parse Everything With ElixirParse Everything With Elixir
Parse Everything With Elixir
 
The Magic Of Elixir
The Magic Of ElixirThe Magic Of Elixir
The Magic Of Elixir
 
Professional Programmer (3 Years Later)
Professional Programmer (3 Years Later)Professional Programmer (3 Years Later)
Professional Programmer (3 Years Later)
 
Resource Oriented Design
Resource Oriented DesignResource Oriented Design
Resource Oriented Design
 
Agileday Coderetreat 2013
Agileday Coderetreat 2013Agileday Coderetreat 2013
Agileday Coderetreat 2013
 
Milano Legacy Coderetreat 2013
Milano Legacy Coderetreat 2013Milano Legacy Coderetreat 2013
Milano Legacy Coderetreat 2013
 
Minimum Viable Product
Minimum Viable ProductMinimum Viable Product
Minimum Viable Product
 
API Over HTTP
API Over HTTPAPI Over HTTP
API Over HTTP
 
coderetreat
coderetreatcoderetreat
coderetreat
 
Professional Programmer
Professional ProgrammerProfessional Programmer
Professional Programmer
 
It is not supposed to fly but it does
It is not supposed to fly but it doesIt is not supposed to fly but it does
It is not supposed to fly but it does
 
MongoDB With Style
MongoDB With StyleMongoDB With Style
MongoDB With Style
 
Nosql
NosqlNosql
Nosql
 
Magic of Ruby
Magic of RubyMagic of Ruby
Magic of Ruby
 
Why couchdb is cool
Why couchdb is coolWhy couchdb is cool
Why couchdb is cool
 
ProgrammingKatas
ProgrammingKatasProgrammingKatas
ProgrammingKatas
 
CouchDB Vs MongoDB
CouchDB Vs MongoDBCouchDB Vs MongoDB
CouchDB Vs MongoDB
 

Recently uploaded

Acumatica vs. Sage Intacct _Construction_July (1).pptx
Acumatica vs. Sage Intacct _Construction_July (1).pptxAcumatica vs. Sage Intacct _Construction_July (1).pptx
Acumatica vs. Sage Intacct _Construction_July (1).pptx
BrainSell Technologies
 
leewayhertz.com-AI agents for healthcare Applications benefits and implementa...
leewayhertz.com-AI agents for healthcare Applications benefits and implementa...leewayhertz.com-AI agents for healthcare Applications benefits and implementa...
leewayhertz.com-AI agents for healthcare Applications benefits and implementa...
alexjohnson7307
 
kk vathada _digital transformation frameworks_2024.pdf
kk vathada _digital transformation frameworks_2024.pdfkk vathada _digital transformation frameworks_2024.pdf
kk vathada _digital transformation frameworks_2024.pdf
KIRAN KV
 
Premium Girls Call Mumbai 9920725232 Unlimited Short Providing Girls Service ...
Premium Girls Call Mumbai 9920725232 Unlimited Short Providing Girls Service ...Premium Girls Call Mumbai 9920725232 Unlimited Short Providing Girls Service ...
Premium Girls Call Mumbai 9920725232 Unlimited Short Providing Girls Service ...
shanihomely
 
Semantic-Aware Code Model: Elevating the Future of Software Development
Semantic-Aware Code Model: Elevating the Future of Software DevelopmentSemantic-Aware Code Model: Elevating the Future of Software Development
Semantic-Aware Code Model: Elevating the Future of Software Development
Baishakhi Ray
 
Use Cases & Benefits of RPA in Manufacturing in 2024.pptx
Use Cases & Benefits of RPA in Manufacturing in 2024.pptxUse Cases & Benefits of RPA in Manufacturing in 2024.pptx
Use Cases & Benefits of RPA in Manufacturing in 2024.pptx
SynapseIndia
 
Uncharted Together- Navigating AI's New Frontiers in Libraries
Uncharted Together- Navigating AI's New Frontiers in LibrariesUncharted Together- Navigating AI's New Frontiers in Libraries
Uncharted Together- Navigating AI's New Frontiers in Libraries
Brian Pichman
 
Girls call Kolkata 👀 XXXXXXXXXXX 👀 Rs.9.5 K Cash Payment With Room Delivery
Girls call Kolkata 👀 XXXXXXXXXXX 👀 Rs.9.5 K Cash Payment With Room Delivery Girls call Kolkata 👀 XXXXXXXXXXX 👀 Rs.9.5 K Cash Payment With Room Delivery
Girls call Kolkata 👀 XXXXXXXXXXX 👀 Rs.9.5 K Cash Payment With Room Delivery
sunilverma7884
 
Finetuning GenAI For Hacking and Defending
Finetuning GenAI For Hacking and DefendingFinetuning GenAI For Hacking and Defending
Finetuning GenAI For Hacking and Defending
Priyanka Aash
 
Camunda Chapter NY Meetup July 2024.pptx
Camunda Chapter NY Meetup July 2024.pptxCamunda Chapter NY Meetup July 2024.pptx
Camunda Chapter NY Meetup July 2024.pptx
ZachWylie3
 
MAKE MONEY ONLINE Unlock Your Income Potential Today.pptx
MAKE MONEY ONLINE Unlock Your Income Potential Today.pptxMAKE MONEY ONLINE Unlock Your Income Potential Today.pptx
MAKE MONEY ONLINE Unlock Your Income Potential Today.pptx
janagijoythi
 
Opencast Summit 2024 — Opencast @ University of Münster
Opencast Summit 2024 — Opencast @ University of MünsterOpencast Summit 2024 — Opencast @ University of Münster
Opencast Summit 2024 — Opencast @ University of Münster
Matthias Neugebauer
 
Acumatica vs. Sage Intacct vs. NetSuite _ NOW CFO.pdf
Acumatica vs. Sage Intacct vs. NetSuite _ NOW CFO.pdfAcumatica vs. Sage Intacct vs. NetSuite _ NOW CFO.pdf
Acumatica vs. Sage Intacct vs. NetSuite _ NOW CFO.pdf
BrainSell Technologies
 
UX Webinar Series: Drive Revenue and Decrease Costs with Passkeys for Consume...
UX Webinar Series: Drive Revenue and Decrease Costs with Passkeys for Consume...UX Webinar Series: Drive Revenue and Decrease Costs with Passkeys for Consume...
UX Webinar Series: Drive Revenue and Decrease Costs with Passkeys for Consume...
FIDO Alliance
 
High Profile Girls call Service Pune 000XX00000 Provide Best And Top Girl Ser...
High Profile Girls call Service Pune 000XX00000 Provide Best And Top Girl Ser...High Profile Girls call Service Pune 000XX00000 Provide Best And Top Girl Ser...
High Profile Girls call Service Pune 000XX00000 Provide Best And Top Girl Ser...
bhumivarma35300
 
Girls Call Churchgate 9910780858 Provide Best And Top Girl Service And No1 in...
Girls Call Churchgate 9910780858 Provide Best And Top Girl Service And No1 in...Girls Call Churchgate 9910780858 Provide Best And Top Girl Service And No1 in...
Girls Call Churchgate 9910780858 Provide Best And Top Girl Service And No1 in...
maigasapphire
 
Types of Weaving loom machine & it's technology
Types of Weaving loom machine & it's technologyTypes of Weaving loom machine & it's technology
Types of Weaving loom machine & it's technology
ldtexsolbl
 
Using LLM Agents with Llama 3, LangGraph and Milvus
Using LLM Agents with Llama 3, LangGraph and MilvusUsing LLM Agents with Llama 3, LangGraph and Milvus
Using LLM Agents with Llama 3, LangGraph and Milvus
Zilliz
 
UX Webinar Series: Essentials for Adopting Passkeys as the Foundation of your...
UX Webinar Series: Essentials for Adopting Passkeys as the Foundation of your...UX Webinar Series: Essentials for Adopting Passkeys as the Foundation of your...
UX Webinar Series: Essentials for Adopting Passkeys as the Foundation of your...
FIDO Alliance
 
The Path to General-Purpose Robots - Coatue
The Path to General-Purpose Robots - CoatueThe Path to General-Purpose Robots - Coatue
The Path to General-Purpose Robots - Coatue
Razin Mustafiz
 

Recently uploaded (20)

Acumatica vs. Sage Intacct _Construction_July (1).pptx
Acumatica vs. Sage Intacct _Construction_July (1).pptxAcumatica vs. Sage Intacct _Construction_July (1).pptx
Acumatica vs. Sage Intacct _Construction_July (1).pptx
 
leewayhertz.com-AI agents for healthcare Applications benefits and implementa...
leewayhertz.com-AI agents for healthcare Applications benefits and implementa...leewayhertz.com-AI agents for healthcare Applications benefits and implementa...
leewayhertz.com-AI agents for healthcare Applications benefits and implementa...
 
kk vathada _digital transformation frameworks_2024.pdf
kk vathada _digital transformation frameworks_2024.pdfkk vathada _digital transformation frameworks_2024.pdf
kk vathada _digital transformation frameworks_2024.pdf
 
Premium Girls Call Mumbai 9920725232 Unlimited Short Providing Girls Service ...
Premium Girls Call Mumbai 9920725232 Unlimited Short Providing Girls Service ...Premium Girls Call Mumbai 9920725232 Unlimited Short Providing Girls Service ...
Premium Girls Call Mumbai 9920725232 Unlimited Short Providing Girls Service ...
 
Semantic-Aware Code Model: Elevating the Future of Software Development
Semantic-Aware Code Model: Elevating the Future of Software DevelopmentSemantic-Aware Code Model: Elevating the Future of Software Development
Semantic-Aware Code Model: Elevating the Future of Software Development
 
Use Cases & Benefits of RPA in Manufacturing in 2024.pptx
Use Cases & Benefits of RPA in Manufacturing in 2024.pptxUse Cases & Benefits of RPA in Manufacturing in 2024.pptx
Use Cases & Benefits of RPA in Manufacturing in 2024.pptx
 
Uncharted Together- Navigating AI's New Frontiers in Libraries
Uncharted Together- Navigating AI's New Frontiers in LibrariesUncharted Together- Navigating AI's New Frontiers in Libraries
Uncharted Together- Navigating AI's New Frontiers in Libraries
 
Girls call Kolkata 👀 XXXXXXXXXXX 👀 Rs.9.5 K Cash Payment With Room Delivery
Girls call Kolkata 👀 XXXXXXXXXXX 👀 Rs.9.5 K Cash Payment With Room Delivery Girls call Kolkata 👀 XXXXXXXXXXX 👀 Rs.9.5 K Cash Payment With Room Delivery
Girls call Kolkata 👀 XXXXXXXXXXX 👀 Rs.9.5 K Cash Payment With Room Delivery
 
Finetuning GenAI For Hacking and Defending
Finetuning GenAI For Hacking and DefendingFinetuning GenAI For Hacking and Defending
Finetuning GenAI For Hacking and Defending
 
Camunda Chapter NY Meetup July 2024.pptx
Camunda Chapter NY Meetup July 2024.pptxCamunda Chapter NY Meetup July 2024.pptx
Camunda Chapter NY Meetup July 2024.pptx
 
MAKE MONEY ONLINE Unlock Your Income Potential Today.pptx
MAKE MONEY ONLINE Unlock Your Income Potential Today.pptxMAKE MONEY ONLINE Unlock Your Income Potential Today.pptx
MAKE MONEY ONLINE Unlock Your Income Potential Today.pptx
 
Opencast Summit 2024 — Opencast @ University of Münster
Opencast Summit 2024 — Opencast @ University of MünsterOpencast Summit 2024 — Opencast @ University of Münster
Opencast Summit 2024 — Opencast @ University of Münster
 
Acumatica vs. Sage Intacct vs. NetSuite _ NOW CFO.pdf
Acumatica vs. Sage Intacct vs. NetSuite _ NOW CFO.pdfAcumatica vs. Sage Intacct vs. NetSuite _ NOW CFO.pdf
Acumatica vs. Sage Intacct vs. NetSuite _ NOW CFO.pdf
 
UX Webinar Series: Drive Revenue and Decrease Costs with Passkeys for Consume...
UX Webinar Series: Drive Revenue and Decrease Costs with Passkeys for Consume...UX Webinar Series: Drive Revenue and Decrease Costs with Passkeys for Consume...
UX Webinar Series: Drive Revenue and Decrease Costs with Passkeys for Consume...
 
High Profile Girls call Service Pune 000XX00000 Provide Best And Top Girl Ser...
High Profile Girls call Service Pune 000XX00000 Provide Best And Top Girl Ser...High Profile Girls call Service Pune 000XX00000 Provide Best And Top Girl Ser...
High Profile Girls call Service Pune 000XX00000 Provide Best And Top Girl Ser...
 
Girls Call Churchgate 9910780858 Provide Best And Top Girl Service And No1 in...
Girls Call Churchgate 9910780858 Provide Best And Top Girl Service And No1 in...Girls Call Churchgate 9910780858 Provide Best And Top Girl Service And No1 in...
Girls Call Churchgate 9910780858 Provide Best And Top Girl Service And No1 in...
 
Types of Weaving loom machine & it's technology
Types of Weaving loom machine & it's technologyTypes of Weaving loom machine & it's technology
Types of Weaving loom machine & it's technology
 
Using LLM Agents with Llama 3, LangGraph and Milvus
Using LLM Agents with Llama 3, LangGraph and MilvusUsing LLM Agents with Llama 3, LangGraph and Milvus
Using LLM Agents with Llama 3, LangGraph and Milvus
 
UX Webinar Series: Essentials for Adopting Passkeys as the Foundation of your...
UX Webinar Series: Essentials for Adopting Passkeys as the Foundation of your...UX Webinar Series: Essentials for Adopting Passkeys as the Foundation of your...
UX Webinar Series: Essentials for Adopting Passkeys as the Foundation of your...
 
The Path to General-Purpose Robots - Coatue
The Path to General-Purpose Robots - CoatueThe Path to General-Purpose Robots - Coatue
The Path to General-Purpose Robots - Coatue
 

Nodejs Explained with Examples