SEMAC 2011 - Apresentando Ruby e Ruby on Rails

Apresentando Ruby
e Ruby on Rails

a apresentação já vai começar ...

Apresentando Ruby
e Ruby on Rails

Fabio Akita
www.akitaonrails.com
@akitaonrails

Fabio Akita
@akitaonrails

1990

Ruby 1994
(linguagem)

Ruby on Rails 2004
(framework web)

1.8.7
Ruby 1.9.2
1.9.3-dev
2.3.11
Ruby on Rails 3.0.7
3.1-RC1

!?
UML
Diagrama de Classes

!?
UML
Diagrama de Classes
POO?

!?
UML
Diagrama de Classes
POC!

Alan Kay

“A melhor maneira
de prever o futuro
é inventá-lo”

Alan Kay
“Eu inventei o termo
Orientação a Objetos
e posso dizer que
eu não tinha
C++ em mente”

#include <stdio.h>

int main()
{
printf("Hello worldn");
return 0;
}

class HelloWorldApp {
public static void main(String[] args) {
System.out.println("Hello World!");
}
}

Transcript show: 'Hello, world!'.

puts 'Hello World'
=> Hello World

puts 'Hello World'
=> Hello World

Kernel.puts 'Hello World'
=> Hello World

puts 'Hello World'
=> Hello World

=> Hello World

puts self.class

puts 'Hello World'
=> Hello World

=> Hello World

this
puts self.class

puts 'Hello World'
=> Hello World

=> Hello World

this
puts self.class
=> Object

puts 'Hello World'
=> Hello World

=> Hello World

this
puts self.class
=> Object

Object.ancestors
=> [Object, Kernel, BasicObject]

"teste".class
=> String

1.class

"teste".class
=> String

1.class
=> Fixnum

"teste".class
=> String

1.class
=> Fixnum

true.class
=> TrueClass

"teste".class
=> String

1.class
=> Fixnum

true.class
=> TrueClass

nil

"teste".class
=> String

1.class
=> Fixnum

true.class
=> TrueClass

nil.class
=> NilClass

"teste".class
=> String

1.class
=> Fixnum

true.class
=> TrueClass

NullPointerException!?
nil.class
=> NilClass

def hello(name)
return "Hello, " + name
end

puts hello("Fabio")
=> "Hello, Fabio"

def hello(name)
end

puts hello "Fabio"
=> "Hello, Fabio"

def hello(name)
end

puts hello "Fabio"
=> "Hello, Fabio"

Parênteses
Opcionais

def hello(name)
"Hello, " + name
end

puts hello "Fabio"
=> "Hello, Fabio"

def hello(name)
"Hello, " + name
end

puts hello "Fabio"
return
=> "Hello, Fabio"
automático

def hello(name)
"Hello, #{name}"
end

puts hello "Fabio"
=> "Hello, Fabio"

def hello(name)
"Hello, #{name}"
end

puts hello "Fabio"
=> "Hello, Fabio" Interpolação

class String
def hello(name)
"#{self}, #{name}"
end
end

class String
def hello(name)
"#{self}, #{name}"
end
end

"Hello".hello "Fabio"
=> "Hello, Fabio"

class String
def hello(name)
"#{self}, #{name}"
end
end

"Hello".hello "Fabio" Classes
=> "Hello, Fabio"
Abertas!

module Legal
def bu!
"Buuu!"
end
end

class String
include Legal
end

class Fixnum
include Legal
end

"foo".bu!
=> "Buuu!"

10.bu!
=> "Buuu!"

module Legal
def bu!
"Buuu!"
end
end

class String
include Legal
end

class Fixnum
Module
include Legal
end Mixin

"foo".bu!
=> "Buuu!"

10.bu!
=> "Buuu!"

require 'rubygems'
require 'active_support'

Time.now + 1.day
=> 2011-05-18 11:44:20 -0300

Time.now + 1.week
=> 2011-05-24 11:44:24 -0300

(1.gigabyte - 100.megabytes) / 1.megabyte
=> 924

list = [1,2,3,4,5]
soma = 0

for i in list
soma += i
end

puts soma
=> 15

list = [1,2,3,4,5]

soma = list.inject(0) { |total, i| total += i }

puts soma
=> 15

list = [1,2,3,4,5]

soma = list.inject(0) do |total, i|
total += i
end

puts soma
=> 15

list = [1,2,3,4,5]

total += i
end

puts soma Anonymous
=> 15 Inner Class?

list = [1,2,3,4,5]

total += i
end

puts soma
=> 15
CLOSURE!

class Foo
def method_missing(method)
print "#{method} called"
end
end

Foo.new.bar
=> "bar called"

Foo.new.send(:bar)
=> "bar called"

class Foo
def method_missing(method)
print "#{method} called"
end
end

Foo.new.bar
=> "bar called"

Foo.new.send(:bar)
=> "bar called"
Messages!

<?xml version="1.1"
encoding="US-ASCII"?>
<Hello>World!</Hello>
<date>
<year>2006</year>
<month>01</month>
<day>01</day>
</date>

require 'builder'
xml = Builder::XmlMarkup.new

xml.instruct! :xml <?xml version="1.1"
encoding="US-ASCII"?>
xml.Hello "World!" <Hello>World!</Hello>
xml.date do <date>
xml.year "2006" <year>2006</year>
xml.month "01" <month>01</month>
xml.day "01" <day>01</day>
end </date>

class Twitter
include HTTParty
base_uri 'twitter.com'
basic_auth 'username', 'password'
end

Twitter.post('/statuses/update.json',
:query => {
:status => "It's an HTTParty and everyone is invited!"
})

1990 1995
PostScript level 2 PostScript level 3
1992 september 11, 1996
OO Forth
Forth 1987
986

ect Logo Tcl Tcl/Tk
1986 mid 1988 end 1988
Fortran 90 ISO
1991
A A+
1988 1992

J K
MPS (FIPS) 1990 MUMPS ISO 1996
M M ANSI Open M
1986 1992 1994 dec 8, 1995 dec 11, 1995
Modula 3 Delphi
1988 march 2, 1995 APL96
1996
ABC
1987
Python
Borland 1991
Object Pascal
1985 Turbo Pascal

ANSI Rexx
f
Oberon Oberon-2
1987 1991
Modula-2 ISO
Ada 95 june 1, 1996
Ada ISO
1987 1995
NetRexx
1991

ANSI C ISO C ISO C
(C89) (C90) (C95)
1989 december 15, 1990 april 1, 1996 JScrip
may 19

Cmm LiveScript JavaScript
1992 1995 december 1995
ARM C++
1989

Oak Java 1
june 1991 may 23, 1995
Ruby
february 24, 1993 Ruby 0.95
december 1995

Self Self 4.0
Eiffel Eiffel 2 Eiffel 3 july 10, 1995 Eiffel 4
1986 1988 1993 december 11, 1996
PHP/FI
1995
Sather 0.1 Sather 1.0 Sather 1.1
june 1991 mid-1994 september 1995

Perl 1.000 Perl 2.000 Perl 3.000 Perl 4.000 Perl 5.000
ecember 18, 1987 january 5, 1988 october 18, 1989 march 21, 1991 october 18, 1994
Objective Caml
1996

sic 1.0 QuickBasic 4.5 MS Basic PDS 7.0 MS PDS 7.1 Visual Basic 3.0 Visual Basic 4.0
1989 Visual Basic 1.0 Visual Basic 2.0
5 1988 1990 may 20, 1991 march 1992 june 93 september 1995
Clos
1989 Common Lisp ANSI
december 8, 1994

Scheme IEEE
1990
Haskell 1.0 Haskell 1.1 Haskell 1.2 Haskell 1.3
1987 april 1, 1990 march 1992 may 1996
SML ‘90
1990

ml Caml 2-6.1 Caml 3.1
87 1991 1993

1954 1957 1960 1965 1970 1975 1980 1985
PostScript
1982

Forth FIG-Forth Forth-83 ANS Forth
1968 1978 1983 1986

Logo Object L
1968 1986

FORTRAN I FORTRAN II FORTRAN III FORTRAN IV FORTRAN IV FORTRAN V
FORTRAN (Fortran 66 ANS) (Fortran 77 ANSI)
november 1954 october 1956 1957 end-1958 1962
1966 april 1978
Prolog Prolog II Prolog III
1970 october 1982 1984
Sharp APL
JOSS TELCOMP MUMPS MUMPS (ANSI) MUMPS (
1964 1965 1966 september 15, 1977 1986

APL APL 2
1960 august 1984
B
1981

Obj
B-O Flow-Matic COBOL COBOL 61 COBOL 61 COBOL COBOL 68 ANS COBOL 74 ANSI COBOL 85 ISO/ANSI
1957 1958 1959 1961 Extended 1965 1968 1974 1985
1962 Rex 1.00 Rex 2.00 Rex 3.00 Rexx 3.20
may 1979 1980 1982 1984
Pascal Pascal AFNOR
1970 1983
PL/M Modula Modula 2
1972 1975 1979
Ada Ada 83 ANSI
1979 january 1983
PL/I PL/1 ANS
1964 1976 Concurrent C
1984
CPL BCPL B C C (K&R)
july 1967 1978 Classic C
1963 1969 1971
JOVIAL JOVIAL I JOVIAL II JOVIAL 3 Objective-C
1959 1960 1961 1965 1983

CORAL 64 CORAL 66 C with Classes
1964 1966 C++
april 1980 july 1983
CLU
Simula 67 1974
Simula I
1964 1967
ALGOL W Mesa
ALGOL 58 ALGOL 60 1966 ALGOL 68 1977
IAL Cedar
1958 1958 1960 december 1983
1968
GOGOL GOGOL III Smalltalk Smalltalk-72 Smalltalk-74 Smalltalk-76 Smalltalk-78 Smalltalk-80
1964 1967 1971 1972 1974 1976 1978 1980
sed
Sail 1973 Mainsail
1968 1975
ISWIM awk nawk
1966 1978 1985
KRC
1981
csh
SASL october 1978
Per
1976 Miranda decemb
1982
sh
1969
BASIC MS Basic 2.0 BASICA GW-Basic QuickBasic 1.0
may 1, 1964 july 1975 1981 1983 1985

Lisp Lisp 1 Lisp 1.5 Common Lisp
1958 1959 1962 1984

Scheme Scheme MIT Scheme 84
1975 1978 1984

ML SML
1973 1984
SL5 Icon
Languages SNOBOL SNOBOL 2 SNOBOL 3 SNOBOL 4 1976 1977
february 27, 2011 Caml
1962 april 1964 1965 1967 1987
! Éric Lévénez 1999-2011
<http://www.levenez.com/lang/>

1 2 3 4

1985 1990 1995 2000
PostScript PostScript level 2 PostScript level 3
1982 1992 september 11, 1996
OO Forth
Forth-83 ANS Forth 1987 ISO Forth
1983 1986 1997

Object Logo Tcl Tcl/Tk Tcl/Tk 8.1 Tcl/Tk 8.2.3
1986 mid 1988 end 1988 april 1999 dec. 16, 1999
Fortran 90 ISO Fortran 95 ISO
1991 december 15, 1997
A A+
Prolog II Prolog III 1988 1992 Prolog IV
october 1982 1984 1997
J K
Sharp APL 1990 1996
MUMPS (FIPS) MUMPS ISO M M ANSI Open M M ISO
1986 1992 1994 dec 8, 1995 dec 11, 1995 1999
Modula 3 Delphi Delphi 5
1988 march 2, 1995 august, 1999
APL 2 APL96
august 1984 1996
B ABC
1981 1987
Python Python 1.5.2 Python 1.6 Python 2.0
Borland 1991 april 13, 1999 september 5, 2000 october 16, 2000 a
Object Pascal
1985 Turbo Pascal
COBOL 85 ISO/ANSI OO COBOL
1985 1997
x 2.00 Rex 3.00 Rexx 3.20 ANSI Rexx Object Rexx
1980 1982 1984 february 25, 1997
Pascal AFNOR
1983 Oberon Oberon-2
1987 1991 Modula-2 ISO
Modula-2 ISO
june 1, 1996 Generic Extension
Ada 83 ANSI Ada ISO Ada 95 december 19, 1998
january 1983 1987 1995
NetRexx NetRexx 1.150
1991 C#
Concurrent C july 23, 1999 june 26, 2000
1984 ANSI C ISO C ISO C ISO C (C99)
(C89) (C90) (C95) december 1, 1999
1989 december 15, 1990 april 1, 1996 JScript JScript
Objective-C may 1996
1983 JavaScript 2.0
Cmm LiveScript JavaScript
1995 JavaScript 1.5 (draft 1)
C with Classes ARM C++ 1992 december 1995 C++98 ANSI/ISO february 18, 1999
C++
april 1980 july 1983 1989 1998
ECMAScript ECMAScript ed3
june 1997 december 1999
Oak Java 1 Java 2 (v1.2) Java 2 (v1.3)
june 1991 may 23, 1995 december 8, 1998 may 8, 2000
Ruby Ruby 1.1 alpha 0
Cedar february 24, 1993 Ruby 0.95 Ruby 1.3.2 Ruby 1.6.1
1983 december 1995 august 13, 1997 april 2, 1999 september 27, 2000
malltalk-80 ANSI Smalltalk
1980 may 19, 1998
Self Self 4.0
Eiffel Eiffel 2 Eiffel 3 july 10, 1995 Eiffel 4 Eiffel 4.2 I
1986 1988 1993 december 11, 1996 february 6, 1998
nawk PHP/FI PHP 2.0 PHP 3.0 PHP 4.0
1985 1995 nov. 13, 1997 june 6, 1998 may 22, 2000
KRC Sather 0.1 Sather 1.0 Sather 1.1 Sather 1.2.1
1981 june 1991 mid-1994 september 1995 november 4, 1999

Perl 2.000 Perl 3.000 Perl 4.000 Perl 5.000 Perl 5.005_50 Perl 5.6.0 Perl 5.7,0
Perl 1.000 july 26, 1998
Miranda december 18, 1987 january 5, 1988 october 18, 1989 march 21, 1991 october 18, 1994 march 28, 2000 september 2, 2000
1982 Objective Caml
O’Caml 1.0.7 O’Caml 2 O’Caml 3.00
1996 1998 june 2000
december 11, 1997
BASICA GW-Basic QuickBasic 1.0 QuickBasic 4.5 MS Basic PDS 7.0 MS PDS 7.1 Visual Basic 3.0 Visual Basic 4.0 Visual Basic 5.0 Visual Basic 6.0 VB.N
1989 Visual Basic 1.0 Visual Basic 2.0
1981 1983 1985 1988 1990 may 20, 1991 march 1992 june 93 september 1995 april 1997 june 16, 1998 (Visual B
Clos 20
Common Lisp 1989 Common Lisp ANSI
1984 december 8, 1994

Scheme 84 Scheme IEEE Scheme R5RS
1984 1990 1998
Haskell 1.0 Haskell 1.1 Haskell 1.2 Haskell 1.3 Haskell 1.4 Haskell 98
1987 april 1, 1990 march 1992 may 1996 april 1997 SML ‘97 february 1999
SML SML ‘90
1984 1990 1997

Caml Caml 2-6.1 Caml 3.1
1987 1991 1993

1 2 3 4

2002 2003 2004 2005
PostScript level 3 PostScript level 3
v 3016 v 3017
2003 september 11, 2005

Tcl/Tk 8.3 Tcl/Tk 8.4 Tcl/Tk 8.4.1 Tcl/Tk 8.4.2 Tcl/Tk 8.4.3 Tcl/Tk 8.4.4 Tcl/Tk 8.4.5 Tcl/Tk 8.4.6 Tcl/Tk 8.4.7 Tcl/Tk 8.4.8 Tcl/Tk 8.4.9 Tcl/Tk 8.4.11 Tcl/Tk 8.4.12
october 22, 2001 september 10, 2002 october 22, 2002 march 3, 2003 may 20, 2003 july 22, 2003 november 24, 2003 march 1, 2004 july 25, 2004 nov. 22, 2004 december 7, 2004 june 28, 2005 december 6, 2005
Fortran 2000
(draft) Fortran 2003
september 30, 2002 november 30, 2004

M ISO
Delphi 6 january 6, 2005 Delphi 2006
Delphi 7 Delphi 8 Delphi 2005
may 1, 2001 august 6, 2002 november 2003 november 2004 october 30, 2005

Python 2.1 Python 2.2 Python 2.2.1 Python 2.2.2 Python 2.3a2 Python 2.2.3 Python 2.3 Python 2.3.1 Python 2.3.2 Python 2.3.3 Python 2.3.4 Python 2.4 Python 2.4.1 Python 2.4.2
0 april 17, 2001 december 21, 2001 april 10, 2002 october 14, 2002 february 19, 2003 may 30, 2003 july 29, 2003 september 23, 2003 october 3, 2003 december 19, 2003 may 27, 2004 november 30, 2004 march 30, 2005 september 28, 2005

COBOL 2002 ISO/ANSI
december 2002

Active Oberon
2001

Ada 2006 (draft)
2005
C# C# C# 2.0
(ECMA) (beta) C# 2.0
(ISO) november 2005
december 13, 2001 march 28, 2003 july 2003
C# 3.0
(beta)
september 2005

JavaScript 2.0 Java 2 (v6.0 beta)
(draft 4) december 2004
april 26, 2002 C++03 ISO/IEC
2003
ECMAScript ed4 (draft)
2002 Java 2 Java 2 (v1.5.0) Java 2 (v5.0 update 3)
Java 2 (v1.4) Java 2 (v1.4.1_03) (beta 1) Java 2 (v5.0) (beta 2) Java 2 (v5.0)
early access Java 2 (v1.4.0_01) Java 2 (v1.4.1) (v1.4.1_02) april 28, 2005
june 4, 2002 june 11, 2003 february 5, 2004 june 28, 2004 september 30, 2004
february 6, 2002 september 2002 february 27, 2003 Java 2 (v1.4.2) Java 2 (v1.4.2_01) Java 2 (v1.4.2_02) Java 2 (v1.4.2_03)
april 29, 2003 Java 2 (v1.4.2_04) Java 2 (v1.4.2_05) Java 2 (v1.4.2_06)
august 26, 2003 october 22, 2003 december 13, 2003 november 23, 2004
Ruby 1.6.5 Ruby 1.6.7 Ruby 1.6.8 march 8, 2004 june 30, 2004 Ruby 1.8.2 Ruby 1.8.3 Ruby 1.8.4
Ruby 1.8 Ruby 1.8.1
september 19, 2001 march 1, 2002 december 24, 2002 august 4, 2003 december 25, 2003 december 25, 2004 september 21, 2005 december 24, 200

Self 4.1 Self 4.1.6 Self 4.2.1
august 7, 2001 september 2002 april 3, 2004 ECMA Eiffel
ISE Eiffel 5
2001 june 2005
PHP 4.1.0 PHP 4.2.0 PHP 4.2.2 PHP 4.2.3 PHP 4.3.0 PHP 4.3.1 PHP 4.3.2 PHP 4.3.3 PHP 4.3.4 PHP 4.3.5 PHP 4.3.6 PHP 4.3.7 PHP 4.3.8 PHP 4.3.10 PHP 4.4.1
december 8, 2001 april 22, 2002 july 22, 2002 september 6, 2002 december 27, 2002 feb. 17, 2003 may 29, 2003 august 25, 2003 november 3, 2003 march 26, april 15, june 3, july 13, 2004 december 15, 2004 october 31, 2005
2004 2004 2004
PHP 5.0.0 PHP 5.0.3 PHP 5.0.4 PHP 5.0.5
july 13, 2004 PHP 5.1.0
december 15, 2004 april 3, 2005 september 6, 2005 november 24, 2005
Perl 5.8.0 Perl 5.8.1 Perl 5.8.2 Perl 5.8.3 Perl 5.8.4 Perl 5.8.5 Perl 5.8.6 Perl 5.8.7
july 18, 2002 september 26, 2003 november 5, 2003 january 1, 2004 april 23, 2004 july 21, 2004 november 30, 2004 june 3, 2005
O’Caml 3.02 O’Caml 3.03 O’Caml 3.04 O’Caml 3.05 O’Caml 3.06 O’Caml 3.07 O’Caml 3.08.0 O’Caml 3.08.2
july 30, 2001 dec 10, 2001 dec 12, 2001 july 29, 2002 august 20, 2002 september 29, 2003 july 13, 2004 november 2004
VB.NET
(Visual Basic 7.0)
2001

Haskell 98
(revised)
december 2002
Unicon
2001

1 2 3 4

2005 2006 2007 2008 2009 2010 2011
PostScript level 3
v 3017
september 11, 2005

Tcl/Tk 8.4.11 Tcl/Tk 8.4.12 Tcl/Tk 8.4.13 Tcl/Tk 8.4.14 Tcl/Tk 8.4.15 Tcl/Tk 8.5 Tcl/Tk 8.5.5 Tcl/Tk 8.5.6 Tcl/Tk 8.5.7 Tcl/Tk 8.5.9
june 28, 2005 december 6, 2005 april 19, 2006 october 19, 2006 may 25, 2007 december 20, 2007 october 15, 2008 january 2009 april 15, 2009 september 8, 2010
Fortran 2008
september 2010

05 Delphi 2006 Delphi 2007 Delphi 2009 Delphi 2010
october 30, 2005 march 2007 august 2008 august 2009
Python 3.0a2 Python 3.0.1 Python 3.1 Python 3.2
december 7, 2007 Python 3.0 june 27, 2009
december 3, 2008 february 13, 2009 february 20, 2011

Python 2.4.1 Python 2.4.2 Python 2.5 Python 2.5.1 Python 2.6 Python 2.6.1 Python 2.6.2 Python 2.6.3 Python 2.7 Python 2.7.1
march 30, 2005 september 28, 2005 september 19, 2006 april 19, 2007 october 1, 2008 december 4, 2008 april 14, 2009 october 2, 2009 july 4, 2010 november 27, 2010

raft) Ada 2005
march 9, 2007
C# 2.0
november 2005
C# 3.0
(beta) C# 3.0 C# 3.5 C# 4.0
september 2005 november 6, 2006 november 19, 2007 april 12, 2010
Objective-C 2.0 Objective-C 2.1
august 7, 2006 august 28, 2009
Java 6 update 2 Java 6 update 7 Java 6 update 11 Java 6 update 14 Java 6 update 24
Java 6 july 11, 2008
december 11, 2006 july 5, 2007 december 2, 2008 june 10, 2009 february 15, 2011
C++0x draft C++1x draft
2008 july 22, 2009
Java 2 (v5.0 update 3) Java 2 (v5.0 update 8) Java 2 (v5.0 update 12) Java 2 (v5.0 update 16) Java 2 (v5.0 update 17) Java 2 (v5.0 update 18) Java 2 (v5.0 update 21)
april 28, 2005 august 11, 2006 may 31, 2007 july 11, 2008 december 2, 2008 march 24, 2009 september 11, 2009
Java 2 (v1.4.2_18) Java 2 (v1.4.2_19)
Ruby 1.8.3 Ruby 1.8.4 Ruby 1.8.5 Ruby 1.8.6 Ruby 1.8.7 july 11, 2008 december 2, 2008
Ruby 1.9.1 Ruby 1.9.2 preview 1 Ruby 1.9.2
september 21, 2005 august 25, 2006 march 13, 2007 may 31, 2008 january 30, 2009 july 18, 2009 august 18, 2010
december 24, 2005

Self 4.3
ECMA Eiffel june 30, 2006
june 2005
PHP 4.4.1 PHP 4.4.2 PHP 4.4.4 PHP 4.4.7 PHP 4.4.8 PHP 4.4.9
october 31, 2005 january 13, 2006 august 17, 2006 may 3, 2007 january 3, 2008 august 7, 2008
PHP 5.0.4 PHP 5.0.5 PHP 5.1.6 PHP 5.2.0 PHP 5.2.3 PHP 5.2.5 PHP 5.2.6 PHP 5.2.7 PHP 5.2.8 PHP 5.3 PHP 5.3.5
PHP 5.1.0 PHP 5.2.4 PHP 5.2.9 january 6, 2011
pril 3, 2005 september 6, 2005 november 24, 2005 august 24, 2006 november 2, 2006 may 31, 2007 august 30, 2007 november 9, 2007 may 1, 2008 december 4, 2008 december 8, 2008 february 26, 2009 june 30, 2009
Perl 5.8.7 Perl 5.8.8 Perl 5.10 Perl 5.11.0 Perl 5.12.0 Perl 5.12.3
june 3, 2005 february 2, 2006 december 18, 2007 october 2, 2009 april 12, 2010 january 21, 2011
O’Caml 3.09.2 O’Caml 3.10.0 O’Caml 3.10.2 O’Caml 3.11.0 O’Caml 3.11.1 O’Caml 3.12.0
april 14, 2006 may 16, 2007 february 29, 2008 december 4, 2008 june 12, 2009 august 2, 2010

Scheme R6RS (draft) Scheme R6RS
september 14, 2006 august 28, 2007 Haskell 2010 Haskell HP 2010.2.0.0
(announced) july 2010
november 2009

1 2 3 4

1954 1957

FORTRAN FORTRAN I FORTRAN II FORTRAN III
november 1954 october 1956 1957 end-1958

B-O Flow-Matic COBOL
1957 1958 1959

JOVIAL
1959

IAL ALGOL 58
1958 1958

Lisp Lisp 1
1958 1959

Languages
february 27, 2011

1954 1957


FORTRAN
1957 1958 1959

JOVIAL
1959

IAL ALGOL 58
1958 1958

Lisp Lisp 1
1958 1959

Languages
february 27, 2011

1954 1957


FORTRAN
1957 1958 1959

JOVIAL
1959

IAL ALGOL 58
1958 1958

LISP
Lisp Lisp 1
1958 1959

Languages
february 27, 2011

$(':checkbox').map(function() {
return this.id;
}).get().join(',');

gem install rails

rails new nome_do_projeto

Request

Web Server

Rack Middlewares

Routes

Controller

View Model

Response Request

Web Server

Rack Middlewares

Routes

Controller

View Model

RubyGem “Jar”

Rake Ant, Make

Bundler* Maven

* não baixa toda a internet

> bundle list

Gems included by the bundle: * mail (2.2.19)
* abstract (1.0.0) * mime-types (1.16)
* actionmailer (3.0.7) * polyglot (0.3.1)
* actionpack (3.0.7) * rack (1.2.2)
* activemodel (3.0.7) * rack-mount (0.6.14)
* activerecord (3.0.7) * rack-test (0.5.7)
* activeresource (3.0.7) * rails (3.0.7)
* activesupport (3.0.7) * railties (3.0.7)
* arel (2.0.9) * rake (0.8.7)
* builder (2.1.2) * sqlite3 (1.3.3)
* bundler (1.0.13) * thor (0.14.6)
* erubis (2.6.6) * treetop (1.4.9)
* i18n (0.5.0) * tzinfo (0.3.27)

> rake -T
rake log:clear
rake about rake middleware
rake db:create rake notes
rake db:drop rake notes:custom
rake db:fixtures:load rake rails:template
rake db:migrate rake rails:update
rake db:migrate:status rake routes
rake db:rollback rake secret
rake db:schema:dump rake stats
rake db:schema:load rake test
rake db:seed rake test:recent
rake db:setup rake test:uncommitted
rake db:structure:dump rake time:zones:all
rake db:version rake tmp:clear
rake doc:app rake tmp:create

> rails generate
Usage: rails generate GENERATOR [args] [options]

General options:
-h, [--help] # Print generator's options and usage
-p, [--pretend] # Run but do not make any changes
-f, [--force] # Overwrite files that already exist
-s, [--skip] # Skip files that already exist
-q, [--quiet] # Suppress status output

Please choose a generator below.

Rails: observer
controller performance_test
generator plugin
helper resource
integration_test scaffold
mailer scaffold_controller
migration session_migration
model stylesheets

> rake middleware Rack
Middlewares
use ActionDispatch::Static
use Rack::Lock
use ActiveSupport::Cache::Strategy::LocalCache
use Rack::Runtime
use Rails::Rack::Logger
use ActionDispatch::ShowExceptions
use ActionDispatch::RemoteIp
use Rack::Sendfile
use ActionDispatch::Callbacks
use ActiveRecord::ConnectionAdapters::ConnectionManagement
use ActiveRecord::QueryCache
use ActionDispatch::Cookies
use ActionDispatch::Session::CookieStore
use ActionDispatch::Flash
use ActionDispatch::ParamsParser
use Rack::MethodOverride
use ActionDispatch::Head
use ActionDispatch::BestStandardsSupport
run Demo::Application.routes

Response Request

Web Server

Application
Rack Middlewares Server Rack:
Mongrel,
Routes Thin,
Passenger,
Controller Unicorn
View Model

Web Server:
NginX
Response Request
Apache
Web Server

Application
Rack Middlewares Server Rack:
Mongrel,
Routes Thin,
Passenger,
Controller Unicorn
View Model

... e chegamos em
2011!

Patrocinadores
Rubinius
JRuby
RailsInstaller
RVM
Bundler
JQuery
RubySpec

~1 milhão
de desenvolvedores
4M até 2013 (Gartner)

A maioria trabalha
com tecnologia “X”,
portanto também vou

Um commodity é um bem ou serviço para
o qual há demanda, mas que é ofertado
sem diferenciação qualitativa notável por
todo o mercado.

Commoditização acontece à medida que
o mercado de bens e serviços perde
diferenciação por toda sua base de
fornecimento - normalmente porque
todos estão fazendo a mesma coisa.

Wikipedia

Jack of All
Trades
master of none

Renaissance
Man
Polymath

SchedulerFactory sf = new StdSchedulerFactory();
Scheduler sched = sf.getScheduler();

job = new JobDetail("job2", "group1",
SimpleJob.class);

trigger = new CronTrigger("trigger2",
"group1", "job2", "group1",
"15 0/2 * * * ?");

sched.addJob(job, true);

SchedulerFactory sf = new StdSchedulerFactory();
Scheduler sched = sf.getScheduler();

JobDetail job = newJob(SimpleJob.class)
.withIdentity("job1", "group1")
.build();

CronTrigger trigger = newTrigger()
.withIdentity("trigger1", "group1")
.withSchedule(cronSchedule("0/20 * * * * ?"))
.build();

sched.scheduleJob(job, trigger);

describe Account do
it "has a balance of zero when first created" do
Account.new.balance.should eq(Money.new(0))
end
end

• Mais Fácil de aprender?

• Mais Produtivo?

• Mais Qualidade?

2 meses
(tempo desenv. 50% menor)

Variáveis
$blue: #3bbfce;
$margin: 16px; /* CSS */

.content-navigation { .content-navigation {
border-color: $blue; border-color: #3bbfce;
color: color: #2b9eab;
darken($blue, 9%); }
}
.border {
.border { padding: 8px;
padding: $margin / 2; margin: 8px;
margin: $margin / 2; border-color: #3bbfce;
border-color: $blue; }
}

Nesting
table.hl { /* CSS */
margin: 2em 0;
td.ln { table.hl {
text-align: right; margin: 2em 0;
} }
} table.hl td.ln {
text-align: right;
li { }
font: {
family: serif; li {
weight: bold; font-family: serif;
size: 1.2em; font-weight: bold;
} font-size: 1.2em;
} }

Mixins
@mixin table-base {
th {
/* CSS */
text-align: center;
font-weight: bold;
#data {
}
td, th {padding: 2px} float: left;
} margin-left: 10px;
}
@mixin left($dist) { #data th {
float: left; text-align: center;
margin-left: $dist; font-weight: bold;
}
}
#data td, #data th {
#data {
@include left(10px); padding: 2px;
@include table-base; }
}

Selector Inheritance
/* CSS */

.error {
.error, .badError {
border: 1px #f00;
border: 1px #f00;
background: #fdd;
background: #fdd;
}
}
.error.intrusion {
font-size: 1.3em;
.error.intrusion,
font-weight: bold;
.badError.intrusion {
}
font-size: 1.3em;
font-weight: bold;
.badError {
}
@extend .error;
border-width: 3px;
.badError {
}
border-width: 3px;
}

var Animal, Horse, Snake, sam, tom;
var __hasProp = Object.prototype.hasOwnProperty,
__extends = function(child, parent) {
for (var key in parent) { if (__hasProp.call(parent,
key)) child[key] = parent[key]; }
function ctor() { this.constructor = child; }
ctor.prototype = parent.prototype;
child.prototype = new ctor;
class Animal child.__super__ = parent.prototype;
constructor: (@name) -> return child;
};
Animal = (function() {
move: (meters) -> function Animal(name) {
this.name = name;
alert @name + " moved " + meters + "m." }
Animal.prototype.move = function(meters) {
return alert(this.name + " moved " + meters + "m.");
class Snake extends Animal };
return Animal;
move: -> })();
alert "Slithering..." Snake = (function() {
__extends(Snake, Animal);
super 5 function Snake() {
Snake.__super__.constructor.apply(this, arguments);
}
class Horse extends Animal Snake.prototype.move = function() {
alert("Slithering...");
move: -> return Snake.__super__.move.call(this, 5);
alert "Galloping..." };
return Snake;
super 45 })();
Horse = (function() {
__extends(Horse, Animal);
sam = new Snake "Sammy the Python" function Horse() {
tom = new Horse "Tommy the Palomino" Horse.__super__.constructor.apply(this, arguments);
}
Horse.prototype.move = function() {
alert("Galloping...");
sam.move() return Horse.__super__.move.call(this, 45);
tom.move() };
return Horse;
})();
sam = new Snake("Sammy the Python");
tom = new Horse("Tommy the Palomino");
sam.move();
tom.move();
loadrun

Rails 3.1:
Release Candidate
THIS WEEK!
(may 2011)

RubyConf
Brasil
3 e 4 de Novembro

Pedro Franceschi
@pedroh96

15 anos

Pedro Franceschi
@pedroh96

9 anos

Pedro Franceschi
@pedroh96

6 anos

Pedro Franceschi
@pedroh96

Obrigado!
www.gonow.com.br
u.akita.ws/semac2011

Sorteio de Bolsas de
Estudo Online (3)

Curso de Ruby on Rails 3 do básico ao
avançado com o Daniel V. Lopes
(http://egenial.com.br/cursorails)

Curso de Node.js com Emerson Leite da
Globo.com
(http://egenial.com.br/nodejs)

Curso de HTML5+CSS3 com o Cleiton
Francisco da Jus Navegandi
(http://egenial.pro/pt/html5)

SEMAC 2011 - Apresentando Ruby e Ruby on Rails

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