ceara on rails 2009
DESCRIPTION
Ruby on Rails e Agilidade no Ceará, dia 7/nov.TRANSCRIPT
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Tuesday, December 15, 2009
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Filoso!a Ruby on Rails
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AkitaOnRails.com
Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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www.slideshare.net/akitaonrails
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Ruby on Rails 2.3
Ruby 1.8
“Novo” Ruby 1.9
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Ruby on Rails 2.3
Ruby 1.8
“Novo” Ruby 1.9
Tuesday, December 15, 2009
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Ruby on Rails 2.3
Ruby 1.8
“Novo” Ruby 1.9
Tuesday, December 15, 2009
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1993“Matz”
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2001“Prag Dave”
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Tuesday, December 15, 2009
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Orientação a Objetos?
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Tuesday, December 15, 2009
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Alan Kay Dan Ingalls
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Eu inventei o termo ‘orientação a
objetos’, e posso lhes dizer que não
estava pensando em C++
Alan Kay
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Meta-programação
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Sim, faz praticamente
tudo
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Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Demo
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Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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2006Charles Nutter
Tuesday, December 15, 2009
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2004“DHH”
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Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Ruby on Rails
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Código que gera Código
Convention over Con!guration
Extreme Programming
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Código que gera Código
Convention over Con!guration
Extreme Programming
Tuesday, December 15, 2009
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Código que gera Código
Convention over Con!guration
Extreme Programming
Tuesday, December 15, 2009
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Restful Resources
Unicode, Time Zone, i18n
Segurança (XSS, CSRF, Injection)
Suporte a vários bancos de dados
Envio/Recebimento de e-mails
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Restful Resources
Unicode, Time Zone, i18n
Segurança (XSS, CSRF, Injection)
Suporte a vários bancos de dados
Envio/Recebimento de e-mails
Tuesday, December 15, 2009
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Restful Resources
Unicode, Time Zone, i18n
Segurança (XSS, CSRF, Injection)
Suporte a vários bancos de dados
Envio/Recebimento de e-mails
Tuesday, December 15, 2009
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Restful Resources
Unicode, Time Zone, i18n
Segurança (XSS, CSRF, Injection)
Suporte a vários bancos de dados
Envio/Recebimento de e-mails
Tuesday, December 15, 2009
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Restful Resources
Unicode, Time Zone, i18n
Segurança (XSS, CSRF, Injection)
Suporte a vários bancos de dados
Envio/Recebimento de e-mails
Tuesday, December 15, 2009
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gem install rails
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“Beautiful Code”
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//$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*$/ validates_length_of :credit_card_name, :within => 3..70 def total hotel.price * nights end def nights ((checkout_date - checkin_date) / 1.day).round end def to_s "Booking(#{user},#{hotel})" endend
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class Booking < ActiveRecord::Base belongs_to :hotel belongs_to :user validates_presence_of :hotel validates_presence_of :user validates_presence_of :credit_card validates_presence_of :credit_card_name validates_length_of :credit_card, :within => 16..16 validates_format_of :credit_card, :with => /^\\d*$/ 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
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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
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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
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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
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190vs
40
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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
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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
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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
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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
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Ferramentas Ágeis
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Repositórios GitoriousGithub
Integração Contínua IntegrityCruise Control
Deployment CapistranoPuppet
Monitoramento New Relic
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Repositórios GitoriousGithub
Integração Contínua IntegrityCruise Control
Deployment CapistranoPuppet
Monitoramento New Relic
Tuesday, December 15, 2009
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Repositórios GitoriousGithub
Integração Contínua IntegrityCruise Control
Deployment CapistranoPuppet
Monitoramento New Relic
Tuesday, December 15, 2009
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Repositórios GitoriousGithub
Integração Contínua IntegrityCruise Control
Deployment CapistranoPuppet
Monitoramento New Relic
Tuesday, December 15, 2009
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Mitos?
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Mais Produtivo
“Melhor”
Anti-legado
Tuesday, December 15, 2009
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Sempre se Lembre
Poderíamos contratar um Macaco Treinadopara fazer seu Trabalho!
Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Como é feito um software?
Tuesday, December 15, 2009
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“Engenharia”
Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Análise Codi!cação
Tuesday, December 15, 2009
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Programação “Compilação”
Tuesday, December 15, 2009
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“Codi!cador”
Tuesday, December 15, 2009
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“Arquiteto”
Tuesday, December 15, 2009
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Standish Group - CHAOS Report 2009
Tuesday, December 15, 2009
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Sucesso32%
Fracasso Médio44%
Fracasso Total24%
Standish Group - CHAOS Report 2009
Tuesday, December 15, 2009
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Quebre Regras!
Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Prazo Custo
Tuesday, December 15, 2009
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Escopo
Prazo Custo
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Futuro Previsível?
Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Winston W. Royce - 1970
Tuesday, December 15, 2009
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“Eu acredito neste conceito mas a implementação descrita acima é
arriscada e convida falhas.”
Winston W. Royce - 1970
Tuesday, December 15, 2009
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“Eu acredito neste conceito mas a implementação descrita acima é
arriscada e convida falhas.”
Winston W. Royce - 1970
Tuesday, December 15, 2009
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“Eu acredito neste conceito mas a implementação descrita acima é
arriscada e convida falhas.”
Winston W. Royce - 1970
Tuesday, December 15, 2009
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crédito: Jeff PattonTuesday, December 15, 2009
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crédito: Jeff PattonTuesday, December 15, 2009
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crédito: Jeff PattonTuesday, December 15, 2009
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crédito: Jeff PattonTuesday, December 15, 2009
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crédito: Jeff PattonTuesday, December 15, 2009
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crédito: Jeff PattonTuesday, December 15, 2009
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crédito: Jeff PattonTuesday, December 15, 2009
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crédito: Jeff PattonTuesday, December 15, 2009
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crédito: Jeff PattonTuesday, December 15, 2009
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crédito: Jeff PattonTuesday, December 15, 2009
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crédito: Jeff PattonTuesday, December 15, 2009
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“Soft”ware exigetécnica e
criatividade
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Trabalho Previsível?
Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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// create some properties and get the default SessionProperties props = new Properties();props.put("mail.smtp.host", _smtpHost);Session session = Session.getDefaultInstance(props, null); // create a messageAddress replyToList[] = { new InternetAddress(replyTo) };Message newMessage = new MimeMessage(session);if (_fromName != null) newMessage.setFrom(new InternetAddress(from, _fromName + " on behalf of " + replyTo));else newMessage.setFrom(new InternetAddress(from)); newMessage.setReplyTo(replyToList); newMessage.setRecipients(Message.RecipientType.BCC, _toList); newMessage.setSubject(subject); newMessage.setSentDate(sentDate); // send newMessageTransport transport = session.getTransport(SMTP_MAIL);transport.connect(_smtpHost, _user, _password);transport.sendMessage(newMessage, _toList);
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new EmailMessage() .from("[email protected]") .to("[email protected]") .withSubject("Fluent Mail API") .withBody("Demo message") .send();
crédito: Guilherme Chapiewski
Tuesday, December 15, 2009
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Escopo
Prazo Custo
Tuesday, December 15, 2009
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Escopo
Prazo Custo
QualidadeVariável
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Qualidade
Prazo Custo
EscopoVariável
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Qualidade
Prazo Custo
EscopoVariável
Tuesday, December 15, 2009
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Agilidade
Tuesday, December 15, 2009
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Agilidade não é Rapidez
Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Robert C. Martin
Tuesday, December 15, 2009
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“Uncle Bob”
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Código Limpo
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Tuesday, December 15, 2009
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Test Driven Development
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Tuesday, December 15, 2009
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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
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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
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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
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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
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Tuesday, December 15, 2009
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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
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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
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Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Não é mais demorado?
Tuesday, December 15, 2009
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Cowboy Profissional
Produtividade
Tuesday, December 15, 2009
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1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Prod
utiv
idad
e
Tempo
Cowboy Profissional
Produtividade
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1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Prod
utiv
idad
e
Tempo
Cowboy Profissional
Produtividade
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1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Prod
utiv
idad
e
Tempo
Cowboy Profissional
Produtividade
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1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Prod
utiv
idad
e
Tempo
Cowboy Profissional
Produtividade
Tuesday, December 15, 2009
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1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Prod
utiv
idad
e
Tempo
Cowboy Profissional
Produtividade
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1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Prod
utiv
idad
e
Tempo
Cowboy Profissional
Produtividade
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1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Prod
utiv
idad
e
Tempo
Cowboy Profissional
Produtividade
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1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Prod
utiv
idad
e
Tempo
Cowboy Profissional
Produtividade
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1 2 3 4 5 6 7 80
17.50
35.00
52.50
70.00
Prod
utiv
idad
e
Tempo
Cowboy Profissional
Produtividade
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Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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237 Equipes137 Finalizadas
Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Empreendedorismo
Código e “Forma”
Ciclo de Vida de Projetos
Comunidade Open Source
Tuesday, December 15, 2009
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Empreendedorismo
Código e “Forma”
Ciclo de Vida de Projetos
Comunidade Open Source
Tuesday, December 15, 2009
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Empreendedorismo
Código e “Forma”
Ciclo de Vida de Projetos
Comunidade Open Source
Tuesday, December 15, 2009
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Empreendedorismo
Código e “Forma”
Ciclo de Vida de Projetos
Comunidade Open Source
Tuesday, December 15, 2009
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Pro!ssionalismo
Tuesday, December 15, 2009
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Tuesday, December 15, 2009
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Obrigado!akitaonrails.com
railssummit.com.br
Tuesday, December 15, 2009