Coding for entrepreneurs

< StartupDecode />
Coding for entrepreneurs:
from zero to hero
Amine Sadry
@donaminos
www.startupdecode.com
@startupdecode /startupDecode /user/startupDecodemeetup.com/startupDecode

< Program />
1. What is Programming ?
2. OOP Principle
3. World Wide Web
4. The best programming language
5. Architecture 101
6. Hands-on Ruby On Rails
7. Apéro Networking

< Machine language />

< Assembler language />
2000 DEF PROCasm(pass,org)
2010 P%=org
2020 [ OPT pass
2030 ADR R0, message
2040 SWI OS_Write0
2050 MOV PC, R14
2060 .message
2070 EQUS "Hello, World!" + CHR$(0)
2080 ALIGN
2090 ]
2100 ENDPROC
1000 REM Hello World using a mix of
BBC Basic and ARM assembler
1010 DIM org 100
1020 OS_Write0 = &2
1030 FOR pass=0 TO 3 STEP 3
1040 PROCasm(pass,org)
1050 NEXT pass
1060 CALL org
1070 END
1080

< High-level language />
void main (void)
{
printf ("Hello n");
if ( x == y )
printf("x equal y n");
}
10100110
01010001
11100101
Compile

< Implementation />
Compiled vs Interpreted

< Procedural programming />
main(){
var data1, data2;
procedure_1();
procedure_2(data1);
procedure_3(data1, data2);
print data2;
}
procedure_1(){
...
}
procedure_2(param){
….
}
procedure_3(p1, p2){
….
}

< OOP principle 1/3 />
Properties:
● Brand
● Color
Actions:
● Strart
● Accelerate
● Stop

Properties:
● Name
● Email
● …
Actions:
● Move
● Text
● …

Attributes
Methods
Class

< Code 1/2 />
Class Nom_classe
attr_accessor :var1, :var2
Def nom_methode_1
…
end
Def nom_methode_2
…
end
end
Class Car
attr_accessor :brand, :color
Def start_engine
puts “Engine started.”
end
Def turn_left
puts “Turn left.”
end
end

< Code 2/2 />
voiture1 = Car.new
voiture1.brand = “Peugeot”
voiture1.color = “rouge”
voiture2 = Car.new
voiture2.brand = “Fiat”
voiture2.color = “verte”
voiture2.start_engine
voiture1.brand
—— ——— ——— —— —— — — — — —
# Engine started.
# Peugeot

< Inheritance />
B
A
C
A A

< Inheritance />
class User
attr_accessor :name
def login
“I logged in!”
end
def logout
“I logged out!”
end
end
class Freelance < User
def add_resume
“I added a resume!”
end
end
class Entreprise < User
def add_offer
“I added an offer!”
end
end

< Ruby code />

< HTTP Protocol />
Client Server
Request
Response

< HTML document />
<head>
</head>
<body>
</body>
<!DOCTYPE html>
<html>
</html>

< Head />
<head>
<title> Titre du document html </title>
</head>

< Body />
<body>
<h1> Titre de ma page </h1>
<p>
Le contenu de mon paragraphe.
</p>
<a href=“www.google.com”> Lien vers google </a>
</body>

< The first website />
http://www.w3.org/...
Browser / Client Server
Response
Request
index.html
page1.html page2.html
Source: http://www.w3.org/History/19921103-hypertext/hypertext/WWW/TheProject.html

< CSS Principle />
<body>
<p id=“identifiant_unique” class=“ma_classe”>
Le contenu de mon paragraphe.
</p>
<p id=“autre_identifiant” class=“ma_classe”>
Un autre paragraphe.
</p>
</body>
#identifiant_unique {
margin-top:20px;
}
.ma_classe {
width:200px;
height: 300px;
}

< Great design />

< Static website />
http://www.horriblest.com/
Browser / Client Server
Response
Request
index.html
page1.html page2.html

< Dynamic website />
http://www.facebook.com
Browser / Client / Front-end Server / Back-end
Response
Request
Database
Web
Application

< Relational database />
cars
id brand color created_at
1 peugeot rouge 23/11/2014
2 fiat verte 23/11/2014
n ... ... ...
SQL:
SELECT * FROM cars WHERE id = 2
INSERT INTO cars (brand, color) VALUES (fiat, verte);
DELETE FROM cars WHERE id = 1;

< Languages />
Response
Request
Database
Web
Application
HTML, CSS,
javascript
SQL
?

Java C# Python PHP Node JS Ruby
Learning
curve
Stability
Ecosystem
Enthusiasm
Workforce
Java C# Python PHP Node JS Ruby
Resources
Use case Linkedin
< Languages />
Criteo Facebook MySpacePinterest AirBnB

Presentation:
HTML / CSS
JavaScript
< Application layers />
Front-end Back-end
Data:
SQL
Logic:
Ruby
on Rails

< MVC architecture />
Database
APP
Controller
View
Model

< Rails app directory />
$ rails new APP_NAME
1. generate new app
3. http://localhost:3000
2. run the server
$ rails server

< Rails app architecture />
Database
Rails app
Controller
(ActionController)
View
(ActionView)
Model
(ActiveRecord)
Routes

< StartupDecode />
@startupdecode /startupDecode /user/startupDecodemeetup.com/startupDecode
Merci
&
A bientôt

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