Railsstutorial：db：populate vs. factory girl

namespace :db do
  desc \"Fill database with sample data\"
  task :populate => :environment do
    Rake::Task[\'db:reset\'].invoke
    User.create!(:name => \"Example User\",
                 :email => \"example@railstutorial.org\",
                 :password => \"foobar\",
                 :password_confirmation => \"foobar\")
    99.times do |n|
      name  = Faker::Name.name
      email = \"example-#{n+1}@railstutorial.org\"
      password  = \"password\"
      User.create!(:name => name,
                   :email => email,
                   :password => password,
                   :password_confirmation => password)
    end
  end
end

Factory.define :user do |user|
  user.name                  \"Michael Hartl\"
  user.email                 \"mhartl@example.com\"
  user.password              \"foobar\"
  user.password_confirmation \"foobar\"
end