semcomp de são carlos
DESCRIPTION
Ruby on Rails e Agilidade em São Carlos.TRANSCRIPT
Tuesday, December 15, 2009
Ruby on RailsTuesday, December 15, 2009
AkitaOnRails.comslideshare.net/akitaonrails
Tuesday, December 15, 2009
Tuesday, December 15, 2009
> 100 slides< 1 hora
Tuesday, December 15, 2009
www.slideshare.net/akitaonrails
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Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Ruby on Rails 2.3
Ruby 1.8
“Novo” Ruby 1.9Tuesday, December 15, 2009
Ruby on Rails 2.3
Ruby 1.8
“Novo” Ruby 1.9Tuesday, December 15, 2009
Ruby on Rails 2.3
Ruby 1.8
“Novo” Ruby 1.9Tuesday, December 15, 2009
1993
“Matz”
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Tuesday, December 15, 2009
2001
“Prag Dave”
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Tuesday, December 15, 2009
2004
“DHH”
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Tuesday, December 15, 2009
07/2004 0.512/2005 1.003/2006 1.101/2007 1.212/2007 2.006/2008 2.111/2008 2.203/2009 2.3
2009? 3.0
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Tuesday, December 15, 2009
2006
Charles Nutter
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Tuesday, December 15, 2009
Tuesday, December 15, 2009
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Tuesday, December 15, 2009
“Tornar as coisas simples fáceis e as coisas complexas
possíveis”Filoso!a Ruby
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Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Orientação a Objetos?
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Tuesday, December 15, 2009
Alan Kay Dan IngallsTuesday, December 15, 2009
Alan KayTuesday, December 15, 2009
Alan KayTuesday, December 15, 2009
Eu inventei o termo ‘orientação a
objetos’, e posso lhes dizer que não
estava pensando em C++
Alan KayTuesday, December 15, 2009
Meta-programação
Tuesday, December 15, 2009
Meta-apresentação
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Tuesday, December 15, 2009
Ruby on Rails
Tuesday, December 15, 2009
Código que gera Código
Convention over Con!guration
Don’t Repeat Yourself
Extreme Programming
Tuesday, December 15, 2009
Código que gera Código
Convention over Con!guration
Don’t Repeat Yourself
Extreme Programming
Tuesday, December 15, 2009
Código que gera Código
Convention over Con!guration
Don’t Repeat Yourself
Extreme Programming
Tuesday, December 15, 2009
Código que gera Código
Convention over Con!guration
Don’t Repeat Yourself
Extreme Programming
Tuesday, December 15, 2009
Restful Resources
Unicode, Time Zone, i18n
Segurança (XSS, CSRF, Injection)
Rack Support (Middlewares)
Tuesday, December 15, 2009
Restful Resources
Unicode, Time Zone, i18n
Segurança (XSS, CSRF, Injection)
Rack Support (Middlewares)
Tuesday, December 15, 2009
Restful Resources
Unicode, Time Zone, i18n
Segurança (XSS, CSRF, Injection)
Rack Support (Middlewares)
Tuesday, December 15, 2009
Restful Resources
Unicode, Time Zone, i18n
Segurança (XSS, CSRF, Injection)
Rack Support (Middlewares)
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
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Tuesday, December 15, 2009
class Product < ActiveRecord::Base after_create :set_initial_inventory has_many :variants, :dependent => :destroy has_many :images, :as => :viewable, :order => :position, :dependent => :destroy has_many :properties, :through => :product_properties belongs_to :tax_category
validates_presence_of :name validates_presence_of :master_price validates_presence_of :description
make_permalink :with => :name, :field => :permalinkend
Model
Tuesday, December 15, 2009
class Product < ActiveRecord::Base after_create :set_initial_inventory has_many :variants, :dependent => :destroy has_many :images, :as => :viewable, :order => :position, :dependent => :destroy has_many :properties, :through => :product_properties belongs_to :tax_category
validates_presence_of :name validates_presence_of :master_price validates_presence_of :description
make_permalink :with => :name, :field => :permalinkend
Model
Tuesday, December 15, 2009
class Product < ActiveRecord::Base after_create :set_initial_inventory has_many :variants, :dependent => :destroy has_many :images, :as => :viewable, :order => :position, :dependent => :destroy has_many :properties, :through => :product_properties belongs_to :tax_category
validates_presence_of :name validates_presence_of :master_price validates_presence_of :description
make_permalink :with => :name, :field => :permalinkend
Model
Tuesday, December 15, 2009
class Product < ActiveRecord::Base after_create :set_initial_inventory has_many :variants, :dependent => :destroy has_many :images, :as => :viewable, :order => :position, :dependent => :destroy has_many :properties, :through => :product_properties belongs_to :tax_category
validates_presence_of :name validates_presence_of :master_price validates_presence_of :description
make_permalink :with => :name, :field => :permalinkend
Model
Tuesday, December 15, 2009
class Product < ActiveRecord::Base after_create :set_initial_inventory has_many :variants, :dependent => :destroy has_many :images, :as => :viewable, :order => :position, :dependent => :destroy has_many :properties, :through => :product_properties belongs_to :tax_category
validates_presence_of :name validates_presence_of :master_price validates_presence_of :description
make_permalink :with => :name, :field => :permalinkend
Model
Tuesday, December 15, 2009
class Product < ActiveRecord::Base after_create :set_initial_inventory has_many :variants, :dependent => :destroy has_many :images, :as => :viewable, :order => :position, :dependent => :destroy has_many :properties, :through => :product_properties belongs_to :tax_category
validates_presence_of :name validates_presence_of :master_price validates_presence_of :description
make_permalink :with => :name, :field => :permalinkend
Model
Tuesday, December 15, 2009
class Product < ActiveRecord::Base after_create :set_initial_inventory has_many :variants, :dependent => :destroy has_many :images, :as => :viewable, :order => :position, :dependent => :destroy has_many :properties, :through => :product_properties belongs_to :tax_category
validates_presence_of :name validates_presence_of :master_price validates_presence_of :description
make_permalink :with => :name, :field => :permalinkend
Model
Tuesday, December 15, 2009
<div id="product-listing"> <%= breadcrumbs(@taxon) %> <br/> <%= render :partial => "shared/products.html.erb", :locals => {:products => @products, :taxon => @taxon } %></div>
<% content_for :sidebar do %> <td id="shop-by-col" valign="top"> <%= render :partial => "shared/taxonomies" %> </td><% end %>
<%= render :partial => 'shared/paginate', :locals => {:collection => @products, :options => {}} unless @products.empty? %>
Views ERB
Tuesday, December 15, 2009
<div id="product-listing"> <%= breadcrumbs(@taxon) %> <br/> <%= render :partial => "shared/products.html.erb", :locals => {:products => @products, :taxon => @taxon } %></div>
<% content_for :sidebar do %> <td id="shop-by-col" valign="top"> <%= render :partial => "shared/taxonomies" %> </td><% end %>
<%= render :partial => 'shared/paginate', :locals => {:collection => @products, :options => {}} unless @products.empty? %>
Views ERB
Tuesday, December 15, 2009
<div id="product-listing"> <%= breadcrumbs(@taxon) %> <br/> <%= render :partial => "shared/products.html.erb", :locals => {:products => @products, :taxon => @taxon } %></div>
<% content_for :sidebar do %> <td id="shop-by-col" valign="top"> <%= render :partial => "shared/taxonomies" %> </td><% end %>
<%= render :partial => 'shared/paginate', :locals => {:collection => @products, :options => {}} unless @products.empty? %>
Views ERB
Tuesday, December 15, 2009
ActionController::Routing::Routes.draw do |map|
map.resources :products map.resources :addresses map.resources :orders, :has_many => [:line_items]
map.namespace :admin do |admin| admin.resources :users admin.resources :products endend
Rotas RESTFul
Tuesday, December 15, 2009
ActionController::Routing::Routes.draw do |map|
map.resources :products map.resources :addresses map.resources :orders, :has_many => [:line_items]
map.namespace :admin do |admin| admin.resources :users admin.resources :products endend
Rotas RESTFul
Tuesday, December 15, 2009
ActionController::Routing::Routes.draw do |map|
map.resources :products map.resources :addresses map.resources :orders, :has_many => [:line_items]
map.namespace :admin do |admin| admin.resources :users admin.resources :products endend
Rotas RESTFul
Tuesday, December 15, 2009
ActionController::Routing::Routes.draw do |map|
map.resources :products map.resources :addresses map.resources :orders, :has_many => [:line_items]
map.namespace :admin do |admin| admin.resources :users admin.resources :products endend
Rotas RESTFul
Tuesday, December 15, 2009
ActionController::Routing::Routes.draw do |map|
map.resources :products map.resources :addresses map.resources :orders, :has_many => [:line_items]
map.namespace :admin do |admin| admin.resources :users admin.resources :products endend
GET /products/newGET /productsPOST /productsGET /products/1GET /products/1/editPUT /products/1DESTROY /products/1
Rotas RESTFul
Tuesday, December 15, 2009
class UsersController < Spree::BaseController resource_controller before_filter :initialize_extension_partials actions :all, :except => [:index, :destroy] show.before do @orders = Order.checkout_completed(true) .find_all_by_user_id(current_user.id) end
create.after { self.current_user = @user }
create.response do |wants| wants.html { redirect_back_or_default(products_path) } end end
Controller
Tuesday, December 15, 2009
class UsersController < Spree::BaseController resource_controller before_filter :initialize_extension_partials actions :all, :except => [:index, :destroy] show.before do @orders = Order.checkout_completed(true) .find_all_by_user_id(current_user.id) end
create.after { self.current_user = @user }
create.response do |wants| wants.html { redirect_back_or_default(products_path) } end end
Controller
Tuesday, December 15, 2009
class UsersController < Spree::BaseController resource_controller before_filter :initialize_extension_partials actions :all, :except => [:index, :destroy] show.before do @orders = Order.checkout_completed(true) .find_all_by_user_id(current_user.id) end
create.after { self.current_user = @user }
create.response do |wants| wants.html { redirect_back_or_default(products_path) } end end
Controller
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“Beautiful Code”
Tuesday, December 15, 2009
//$Id: Booking.java 5579 2007-06-27 00:06:49Z gavin $package org.jboss.seam.example.booking;
import java.io.Serializable;import java.math.BigDecimal;import java.text.DateFormat;import java.util.Date;
import javax.persistence.Basic;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.ManyToOne;import javax.persistence.Temporal;import javax.persistence.TemporalType;import javax.persistence.Transient;
import org.hibernate.validator.Length;import org.hibernate.validator.NotNull;import org.hibernate.validator.Pattern;import org.jboss.seam.annotations.Name;
@Entity@Name("booking")public class Booking implements Serializable{ private Long id; private User user; private Hotel hotel; private Date checkinDate; private Date checkoutDate; private String creditCard; private String creditCardName; private int creditCardExpiryMonth; private int creditCardExpiryYear; private boolean smoking; private int beds; public Booking() {} public Booking(Hotel hotel, User user) { this.hotel = hotel; this.user = user; }
@Transient public BigDecimal getTotal() { return hotel.getPrice().multiply( new BigDecimal( getNights() ) ); }
@Transient public int getNights() { return (int) ( checkoutDate.getTime() - checkinDate.getTime() ) / 1000 / 60 / 60 / 24; }
@Id @GeneratedValue public Long getId() { return id; } public void setId(Long id) { this.id = id; } @NotNull @Basic @Temporal(TemporalType.DATE) public Date getCheckinDate() { return checkinDate; } public void setCheckinDate(Date datetime) { this.checkinDate = datetime; }
@ManyToOne @NotNull public Hotel getHotel() { return hotel; } public void setHotel(Hotel hotel) { this.hotel = hotel; } @ManyToOne @NotNull public User getUser() { return user; }
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public void setUser(User user) { this.user = user; } @Basic @Temporal(TemporalType.DATE) @NotNull public Date getCheckoutDate() { return checkoutDate; } public void setCheckoutDate(Date checkoutDate) { this.checkoutDate = checkoutDate; } @NotNull(message="Credit card number is required") @Length(min=16, max=16, message="Credit card number must 16 digits long") @Pattern(regex="^\\d*$", message="Credit card number must be numeric") public String getCreditCard() { return creditCard; }
public void setCreditCard(String creditCard) { this.creditCard = creditCard; } @Transient public String getDescription() { DateFormat df = DateFormat.getDateInstance(DateFormat.MEDIUM); return hotel==null ? null : hotel.getName() + ", " + df.format( getCheckinDate() ) + " to " + df.format( getCheckoutDate() ); }
public boolean isSmoking() { return smoking; }
public void setSmoking(boolean smoking) { this.smoking = smoking; }
public int getBeds() { return beds; }
public void setBeds(int beds) { this.beds = beds; } @NotNull(message="Credit card name is required") @Length(min=3, max=70, message="Credit card name is required") public String getCreditCardName() { return creditCardName; }
public void setCreditCardName(String creditCardName) { this.creditCardName = creditCardName; }
public int getCreditCardExpiryMonth() { return creditCardExpiryMonth; }
public void setCreditCardExpiryMonth(int creditCardExpiryMonth) { this.creditCardExpiryMonth = creditCardExpiryMonth; }
public int getCreditCardExpiryYear() { return creditCardExpiryYear; }
public void setCreditCardExpiryYear(int creditCardExpiryYear) { this.creditCardExpiryYear = creditCardExpiryYear; } @Override public String toString() { return "Booking(" + user + ","+ hotel + ")"; }
}
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class Booking < ActiveRecord::Base belongs_to :hotel belongs_to :user validates_presence_of :hotel validates_presence_of :user validates_presence_of :credit_card validates_presence_of :credit_card_name validates_length_of :credit_card, :within => 16..16 validates_format_of :credit_card, :with => /^\\d*$/ validates_length_of :credit_card_name, :within => 3..70 def total hotel.price * nights end def nights ((checkout_date - checkin_date) / 1.day).round end def to_s "Booking(#{user},#{hotel})" endend
Tuesday, December 15, 2009
class Booking < ActiveRecord::Base belongs_to :hotel belongs_to :user validates_presence_of :hotel validates_presence_of :user validates_presence_of :credit_card validates_presence_of :credit_card_name validates_length_of :credit_card, :within => 16..16 validates_format_of :credit_card, :with => /^\\d*$/ validates_length_of :credit_card_name, :within => 3..70 def total hotel.price * nights end def nights ((checkout_date - checkin_date) / 1.day).round end def to_s "Booking(#{user},#{hotel})" endend
Tuesday, December 15, 2009
class CreateBookings < ActiveRecord::Migration def self.up create_table :bookings do |t| t.references :user t.references :hotel t.datetime :checkin t.datetime :checkout t.string :credit_card t.string :credit_card_name t.integer :credit_card_expiry_month t.integer :credit_card_expiry_year t.boolean :smoking t.integer :beds
t.timestamps end end
def self.down drop_table :bookings endend
Tuesday, December 15, 2009
class CreateBookings < ActiveRecord::Migration def self.up create_table :bookings do |t| t.references :user t.references :hotel t.datetime :checkin t.datetime :checkout t.string :credit_card t.string :credit_card_name t.integer :credit_card_expiry_month t.integer :credit_card_expiry_year t.boolean :smoking t.integer :beds
t.timestamps end end
def self.down drop_table :bookings endend
Tuesday, December 15, 2009
class CreateBookings < ActiveRecord::Migration def self.up create_table :bookings do |t| t.references :user t.references :hotel t.datetime :checkin t.datetime :checkout t.string :credit_card t.string :credit_card_name t.integer :credit_card_expiry_month t.integer :credit_card_expiry_year t.boolean :smoking t.integer :beds
t.timestamps end end
def self.down drop_table :bookings endend
Tuesday, December 15, 2009
190vs
40
Tuesday, December 15, 2009
http://www.railsonwave.com/railsonwave/2008/6/4/yellowpages-com-migrates-to-rails
“Eles servem mais de 23 milhões de visitantes/mês. A conversão resultou em 20 mil linhas de Ruby em vez de 125 mil linhas de Java e, mais importante, facilitou a dificuldade que tinham em manutenção. Eles também finalizaram a reescrita do sistema em apenas 3 meses com 4 desenvolvedores. Uma vez completo e otimizado, o site deles
agora é mais rápido que antes.”
Tuesday, December 15, 2009
http://www.railsonwave.com/railsonwave/2008/6/4/yellowpages-com-migrates-to-rails
“Eles servem mais de 23 milhões de visitantes/mês. A conversão resultou em 20 mil linhas de Ruby em vez de 125 mil linhas de Java e, mais importante, facilitou a dificuldade que tinham em manutenção. Eles também finalizaram a reescrita do sistema em apenas 3 meses com 4 desenvolvedores. Uma vez completo e otimizado, o site deles
agora é mais rápido que antes.”
Tuesday, December 15, 2009
http://www.railsonwave.com/railsonwave/2008/6/4/yellowpages-com-migrates-to-rails
“Eles servem mais de 23 milhões de visitantes/mês. A conversão resultou em 20 mil linhas de Ruby em vez de 125 mil linhas de Java e, mais importante, facilitou a dificuldade que tinham em manutenção. Eles também finalizaram a reescrita do sistema em apenas 3 meses com 4 desenvolvedores. Uma vez completo e otimizado, o site deles
agora é mais rápido que antes.”
Tuesday, December 15, 2009
http://www.railsonwave.com/railsonwave/2008/6/4/yellowpages-com-migrates-to-rails
“Eles servem mais de 23 milhões de visitantes/mês. A conversão resultou em 20 mil linhas de Ruby em vez de 125 mil linhas de Java e, mais importante, facilitou a dificuldade que tinham em manutenção. Eles também finalizaram a reescrita do sistema em apenas 3 meses com 4 desenvolvedores. Uma vez completo e otimizado, o site deles
agora é mais rápido que antes.”
Tuesday, December 15, 2009
Ferramentas Ágeis
Tuesday, December 15, 2009
Repositórios GitoriousGithub
Integração Contínua
IntegrityCruise Control
Deployment CapistranoPuppet
Monitoramento New Relic
Tuesday, December 15, 2009
Repositórios GitoriousGithub
Integração Contínua
IntegrityCruise Control
Deployment CapistranoPuppet
Monitoramento New Relic
Tuesday, December 15, 2009
Repositórios GitoriousGithub
Integração Contínua
IntegrityCruise Control
Deployment CapistranoPuppet
Monitoramento New Relic
Tuesday, December 15, 2009
Repositórios GitoriousGithub
Integração Contínua
IntegrityCruise Control
Deployment CapistranoPuppet
Monitoramento New Relic
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Comunidade
Tuesday, December 15, 2009
Satish Talim
rubylearning.org
Tuesday, December 15, 2009
Geoffrey
peepcode.com
Tuesday, December 15, 2009
Ryan Bates
railscasts.com
Tuesday, December 15, 2009
Peter Cooper
rubyinside.com.br
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
O que dizempor aí ...
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Pouco usado
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Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Rails não Escala
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Tuesday, December 15, 2009
Tuesday, December 15, 2009
Blaine Cook
http://www.akitaonrails.com/2008/6/17/chatting-with-blaine-cook-twitter
Tuesday, December 15, 2009
Para colocar as coisas em perspectiva, o Friendster foi
escrito em Java e eles mudaram para PHP.
MySpace foi escrito em ColdFusion e eles mudaram
para ASP.NET.
Blaine Cook
http://www.akitaonrails.com/2008/6/17/chatting-with-blaine-cook-twitter
Tuesday, December 15, 2009
Para colocar as coisas em perspectiva, o Friendster foi
escrito em Java e eles mudaram para PHP.
MySpace foi escrito em ColdFusion e eles mudaram
para ASP.NET.
Blaine Cook
http://www.akitaonrails.com/2008/6/17/chatting-with-blaine-cook-twitter
Quando as pessoas caem em problemas de escalabilidade, normalmente acham que a
linguagem é o problema, mas eu acho que isso raramente é
a realidade.
Tuesday, December 15, 2009
http://www.computerworld.com.au/article/268003/ruby_rails_rolls_into_enterprise?fp=16&fpid=1
“O The New York Times usou Ruby on Rails para agregar, analizar e mostrar os
resultados das eleições em quase tempo real em um de seus sites mais acessados
de todos os tempos.”
Tuesday, December 15, 2009
http://www.computerworld.com.au/article/268003/ruby_rails_rolls_into_enterprise?fp=16&fpid=1
“O The New York Times usou Ruby on Rails para agregar, analizar e mostrar os
resultados das eleições em quase tempo real em um de seus sites mais acessados
de todos os tempos.”
Tuesday, December 15, 2009
Ruby é Lento
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x mais lento que C++
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0 50 100 150 200
Python 2
Ruby 1.9
Perl
JRuby
Python 3
PHP
Ruby 1.8.6
x mais lento que C++
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Homepage: 331 ms
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Homepage: 331 ms
Total: 5.45 s
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Performance!=
Escalabilidade
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Outros Mitos?
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Tuesday, December 15, 2009
Mais Produtivo
“Melhor”
Anti-legadoTuesday, December 15, 2009
Sempre se Lembre
Poderíamos contratar um Macaco Treinadopara fazer seu Trabalho!
Tuesday, December 15, 2009
Agilidade
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Tuesday, December 15, 2009
Robert C. Martin
Tuesday, December 15, 2009
“Uncle Bob”
Tuesday, December 15, 2009
Código Limpo
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Tuesday, December 15, 2009
Test Driven Development
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Tuesday, December 15, 2009
describe BankAccount do before :each do @bank_account = BankAccount.new :balance => 250 end it "should not be valid" do @bank_account.should be_valid end it "should transfer funds successfully" do @bank_account.should_receive(:transfer) .with_args(:amount => 100) .and_return(true) @bank_account.execute_transaction(:amount => 100) @bank_account.balance.should == 150 endend
Tuesday, December 15, 2009
describe BankAccount do before :each do @bank_account = BankAccount.new :balance => 250 end it "should not be valid" do @bank_account.should be_valid end it "should transfer funds successfully" do @bank_account.should_receive(:transfer) .with_args(:amount => 100) .and_return(true) @bank_account.execute_transaction(:amount => 100) @bank_account.balance.should == 150 endend
Tuesday, December 15, 2009
describe BankAccount do before :each do @bank_account = BankAccount.new :balance => 250 end it "should not be valid" do @bank_account.should be_valid end it "should transfer funds successfully" do @bank_account.should_receive(:transfer) .with_args(:amount => 100) .and_return(true) @bank_account.execute_transaction(:amount => 100) @bank_account.balance.should == 150 endend
Tuesday, December 15, 2009
describe BankAccount do before :each do @bank_account = BankAccount.new :balance => 250 end it "should not be valid" do @bank_account.should be_valid end it "should transfer funds successfully" do @bank_account.should_receive(:transfer) .with_args(:amount => 100) .and_return(true) @bank_account.execute_transaction(:amount => 100) @bank_account.balance.should == 150 endend
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Funcionalidade: Adição Para evitar erros bobos Como um péssimo matemático Eu quero saber como somar dois números Cenário: Adicionar dois números Dado que eu digitei 50 na calculadora E que eu digitei 70 na calculadora Quando eu aperto o botão de soma Então o resultado na calculadora deve ser 120
Tuesday, December 15, 2009
Funcionalidade: Adição Para evitar erros bobos Como um péssimo matemático Eu quero saber como somar dois números Cenário: Adicionar dois números Dado que eu digitei 50 na calculadora E que eu digitei 70 na calculadora Quando eu aperto o botão de soma Então o resultado na calculadora deve ser 120
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Não é mais demorado?
Tuesday, December 15, 2009
Cowboy Profissional
Produtividade
Tuesday, December 15, 2009
1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Produtividade
Tempo
Cowboy Profissional
Produtividade
Tuesday, December 15, 2009
1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Produtividade
Tempo
Cowboy Profissional
Produtividade
Tuesday, December 15, 2009
1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Produtividade
Tempo
Cowboy Profissional
Produtividade
Tuesday, December 15, 2009
1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Produtividade
Tempo
Cowboy Profissional
Produtividade
Tuesday, December 15, 2009
1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Produtividade
Tempo
Cowboy Profissional
Produtividade
Tuesday, December 15, 2009
1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Produtividade
Tempo
Cowboy Profissional
Produtividade
Tuesday, December 15, 2009
1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Produtividade
Tempo
Cowboy Profissional
Produtividade
Tuesday, December 15, 2009
1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Produtividade
Tempo
Cowboy Profissional
Produtividade
Tuesday, December 15, 2009
1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Produtividade
Tempo
Cowboy Profissional
Produtividade
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Tuesday, December 15, 2009
237 Equipes137 Finalizadas
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Empreendedorismo
Código e “Forma”
Ciclo de Vida de Projetos
Comunidade Open Source
Tuesday, December 15, 2009
Empreendedorismo
Código e “Forma”
Ciclo de Vida de Projetos
Comunidade Open Source
Tuesday, December 15, 2009
Empreendedorismo
Código e “Forma”
Ciclo de Vida de Projetos
Comunidade Open Source
Tuesday, December 15, 2009
Empreendedorismo
Código e “Forma”
Ciclo de Vida de Projetos
Comunidade Open Source
Tuesday, December 15, 2009
Post hoc ergo propter hoc
Tuesday, December 15, 2009
Pro!ssionalismo
Tuesday, December 15, 2009
Tuesday, December 15, 2009
Obrigado!akitaonrails.com
railssummit.com.br
Tuesday, December 15, 2009